Chevrolet Niva stove: heating system design, heater replacement, how to replace the cable, control unit and pipes with your own hands + video

It is indispensable if you live outside the city, it justifies itself as a car for the whole family and is very stable. With the arrival of the autumn-winter period, good and high-quality operation of the heater will be relevant. If the stove does not heat well, the Chevrolet Niva will become a very uncomfortable car, and you will have to forget about its advantages. Moreover, if the car was parked in the garage overnight, it is problematic to be in it and feel the cold comparable to that of a basement. Let's consider the main components of this technological unit of the car:

radiator;
fan;
dampers;
pipes;
air duct;
unit for regulating fluid movement.

The stove will work properly if each of its parts works properly and in a coordinated manner.

Main malfunctions and methods for eliminating them in the Chevrolet Niva car stove:

The ventilating elements of the heater burned out. This will be immediately visible in winter by the formation of characteristic condensation on the windows. They simply need to be replaced with new ones;
the unit that regulates the temperature breaks, since it can be made of plastic rather than rubber or rubber, which has greater wear resistance. Naturally, the possibility of the cable falling off should also be considered. Depending on the situation, you either carefully return the part to its place and it continues to perform its traction function, or you need to purchase a new one and replace it;
poor filter performance due to clogging. Accordingly, they need to be cleaned or purged, otherwise air pockets will form in the stove, disrupting its productive operation;
problems with the cooling system - you should rinse and fill in a new coolant - antifreeze or antifreeze, which is changed annually for prevention;
The damper that regulates the supply of cold and hot air has broken. It will have to be replaced;
The thermostat is not working well. It might simply get jammed. Please note that the heater will malfunction when driving fast. It must be replaced immediately, because poor quality work will lead to an increase in temperature throughout the Chevrolet Niva;
The resistor on the radiator has burned out or the radiator is clogged. There can be many reasons: antifreeze, insects, leaves and other debris. Also, water should not be allowed to get into this part of the stove. The radiator must be cleaned periodically, and in case of a malfunction, a new resistor must be purchased and installed. Cleaning is carried out with compressed air or a vacuum cleaner, an industrial hair dryer;
The heater control unit, the so-called controller responsible for regulating the interior temperature, may fail. This is already a problem with electronics; to fix it, you need the services of a specialist.

Recommendations for normal and long-term operation of the heating-cooling system in a Chevrolet Niva:

periodically lubricate the bearings of the stove ventilation device;
Check the filters and radiator regularly, and if necessary, clean them or purchase new ones. The filter cleans the air from dust and infections coming from the street;
remove air pockets when the engine is idling and muffled;
clean the pipes with citric acid or a special product, since poor quality coolant forms sediment and build-up in the pipes.

At a temperature of minus 20 degrees, the Chevrolet heating system should heat the top of the cabin to an average of 10 degrees, and the temperature in the legs is 5-7 degrees higher. Passengers in the rear seats will receive air with a temperature of about 14 degrees. This way, everyone will be in comfortable conditions, and the trip in winter will be quite pleasant.

To avoid problems with the heating and ventilation system, preventive maintenance should be carried out systematically. After all, a car is a complex device that will drive well and function properly only with proper care.

Of course, problems with the stove are not the most critical troubles or breakdowns, but your health, mood and, naturally, performance depend on your comfort and the comfort of your passengers. We value not the quantity, but the quality of the years lived, so let your Chevrolet Niva be a high-quality, elegant and capable car.

How to fix the problem in which the stove on a Chevrolet Niva does not blow at your feet

It is not difficult to fall in love with a vehicle like the Chevrolet Niva with all your heart. The car is truly beautiful and comes with a fair amount of benefits. Unfortunately, in modern reality it is almost impossible to find a device or mechanism that does not have flaws.

The Chevrolet Niva was also no exception, so it is not at all surprising that after some period of direct operation of this vehicle, complaints from car owners begin to arrive. This flow of some discontent especially intensifies in the winter.

Complaints are related to the fact that on the Chevrolet Niva the stove does not blow into the feet at all, which freeze very quickly, depriving both the driver and passengers of comfort. Why the stove refuses to blow in this direction is not a mystery. It’s just that most drivers are convinced that this is a technical defect due to insufficient attention from the designers who developed such a model.

To ensure proper comfort for the driver and passengers, it will be necessary to modify the heater damper drive.

This way you can come to an agreement with the Niva Chevrolet stove and make it evenly warm up the interior.

The stove is good (if it works). The stove is hot, the cabin is warm, I can’t find where to blow into my feet...

The filter cleans the air from dust and infections coming from the street; remove air pockets when the engine is idling and muffled; clean the pipes with citric acid or a special product, since poor quality coolant forms sediment and build-up in the pipes. As a result, it cannot effectively blow in several directions at once, but when the flow is directed towards the legs, the air is distributed anywhere, but not in the desired direction. This is done as follows:

If you move the lever in the opposite left direction until it stops, air will flow between the side and top deflectors. Actually, this is a design feature of this model.

Unfortunately, in modern reality it is almost impossible to find a device or mechanism that does not have flaws. The Chevrolet Niva was also no exception, so it is not at all surprising that after some period of direct operation of this vehicle, complaints from car owners begin to arrive. This flow of some discontent especially intensifies in the winter.

Complaints are related to the fact that on the Chevrolet Niva the heater does not blow into the feet at all, which freeze very quickly, depriving both the driver and passengers of comfort.

Why the stove refuses to blow in this direction is not a mystery. It’s just that most drivers are convinced that this is a technical defect due to insufficient attention from the designers who developed such a model.

The radiator must be cleaned periodically, and in case of a malfunction, a new resistor must be purchased and installed. Cleaning is carried out with compressed air or a vacuum cleaner, an industrial hair dryer; The heater control unit, the so-called controller responsible for regulating the interior temperature, may fail.

We recommend: Why antifreeze boils in the expansion tank: a review of common breakdowns

This is already a problem with electronics; to fix it, you need the services of a specialist. Recommendations for normal and long-term operation of the heating-cooling system in a Chevrolet Niva: The filter cleans the air of dust and infections coming from the street; remove air pockets when the engine is idling and muffled; clean the pipes with citric acid or a special product, since poor quality coolant forms sediment and build-up in the pipes.

At a temperature of minus 20 degrees, the Chevrolet heating system should heat the top of the cabin to an average of 10 degrees, and the temperature in the legs is degrees higher.

You can also relatively smoothly regulate the amount of air supplied in different directions. After such a modification, you may encounter a decrease in air flow. This is due to air redistribution.

Chevrolet Niva 2004, 80 l. With. — self-repair

The result is that in the middle position the cabin is still quite cool. To eliminate this drawback, you will need an unnecessary plastic canister.

We cut off the neck from it and attach it to the deflector. The result is a fairly powerful and targeted flow.

The cause of cold in the cabin may also be a simple heater failure. Therefore, we will consider the most common causes of breakdowns. All of them lie on the surface, and in principle are characteristic of many modern cars. The most common cause is a blown fuse. Check the appropriate fuse and replace it if necessary.

The main reasons when the stove does not blow warm air into your feet

The heater radiator is leaking

Before gutting the air ducts and air dampers, you need to make sure that the antifreeze warms up to its operating temperature.

And this may depend on a lot of factors - the quality of the pump , the tightness of the system and the heater radiator , including the correct operation of the thermostat, and the quality of the coolant. If the temperature with a fully warmed-up engine is within 80-90 degrees, we look for the reasons for the lack of air in the legs in the design of the heater.

Turn on maximum heat.

A feature of the stove on a Chevrolet Niva is the absence of a heater radiator tap, that is, antifreeze circulates in a full circle in winter and summer and passes through the heater radiator. Taking this fact into account, the factory somewhat complicated the design of the air ducts and air dampers - there are two of them in the Chevrolet Niva.

Upper deflector flap.

One works for frontal airflow, the second is responsible for supplying air to the feet of the front and rear passengers and the driver. It is with this damper that problems arise that we will try to solve.

Correctly turn on the foot airflow

It turns out that even after several years of owning a Niva Chevrolet, not everyone knows how to properly turn on the warm air to blow their feet. By using fan speed controls and damper position controls, and using sound logic, we can end up with a situation where the entire flow of hot air is directed onto the windshield and into the face of the driver and front passenger. Of course, the car is warm, even hot, but your feet are cold.

Practice has shown that Shniva has a special algorithm for supplying hot air to the legs . On most instances this is done like this:

We warm up the engine until the flow of warm air is clearly felt by the hand.
The fan speed switch is set to the fourth position, 4th speed.
Turn the airflow direction knob to exactly 12 o'clock.
Immediately return it to the 10-11 o'clock position.
Correct position of the stove blower control.
The air damper will make a characteristic click and the air flow will flow to your feet. Now you can set the blowing intensity at your discretion.
If this method did not work the first time, the second or third time it works in 90% of cases.

Having remembered this sequence, you will have to turn on the airflow several times, after which the damper will rub in and find the desired position itself in accordance with the pictogram on the adjustment handle.

It's all about the inaccuracy of assembling the heater assembly - backlashes and gaps interfere with air distribution and setting the damper in the desired position from the first turn on.

Heater diagram

The most common reason for its failure is: Warm air does not enter the lower part of the cabin Before starting repairs of the stove, you should check the temperature of the coolant. Perhaps the problem is not in the interior heater, but in the cooling system.

With the help of damper position regulators, warm air is directed to different parts of the cabin. First, the dampers should be adjusted. To supply hot air to your feet, follow these steps: The engine warms up until the warm air can be felt with your hand. Consequently, it is almost impossible to open the tap without breaking it.

stove Niva Chevrolet

https://youtube.com/watch?v=UNMCm8ypDbI

To get to it, you need to dismantle the dashboard in the cabin on the passenger side. The stove tap is mounted in a special niche in the engine compartment. If the tap has been replaced, then it is better to install new pipes along with it, because during operation they have probably lost their elasticity.

Collective farm tuning of the Niva Chevrolet stove: In some cases, the correct switching method does not work and then you have to modify the heater in order to achieve its full functionality. The main problem with dampers and ducts is leakage.

We will improve the cracks and eliminate leaks in the stove. Remove the heater control unit by disconnecting all wires and cables from it. If there is a radio, remove that too. Disconnect the transmission tunnel lining.

You don’t have to remove it completely, but only lift it by unscrewing two screws on the driver’s and passenger’s sides. Remove the steering wheel, steering column trim and unscrew the screws securing the front panel. When removing the dashboard, mark all the wires to make it easier to reattach them in their places in the future.

Without removing the entire front panel, when dismantling the heater unit, some elements of the air conditioner and the stove itself can be damaged. Remove the front panel frame attached to the body with screws. The heater housing cannot be removed without dismantling the front panel frame. Behind the frame you will find the heater unit casing, connected to the intermediate housing of the heater or to the evaporator section on a car with air conditioning.

Chevrolet Niva 2012, 80 l. With. — self-repair

Installation of a new unit is carried out in reverse order. The most common purpose of such tuning is to improve the air supply to the driver's and front passenger's footwells. To do this, install additional air ducts and adjust the shape of the damper drive strip

For such modification you will need: You must work with the plastic of the heater housing very carefully, as it is quite fragile

The steps are performed in the following order: Select tubes suitable for the role of additional air ducts. You can use plumbing pipes as additional air ducts. Remove the side trims on the center console on both sides.

Air flows in the cabin are distributed by air ducts, which are located under the instrument panel and under the floor tunnel lining, and under the floor upholstery to supply air to the feet of the rear passengers.

To control the distribution of air flows, use the distribution regulator handle on the center console of the instrument panel, as well as the regulators and guides of the central and side deflectors on the instrument panel.

To heat the interior, move the temperature control knob to the hot red zone. In this case, the outside air is directed using a damper through the heater radiator, which is integrated with the engine cooling system.

Remove the screws of the tie rod brackets. Disconnect the rods from the heater damper levers. Unscrew the screw of the bracket securing the recirculation flap drive rod and remove the lever bracket and disconnect the wiring harness block from the heater electric fan switch.

Heater diagram First of all, we want to orient you that the Niva already has a liquid-type heater installed, which allows you not only to supply warm air into the car interior, but also to cool the running engine, preventing it from overheating. It's no secret that overheating the engine entails extremely undesirable consequences.

An electromagnetic clutch is built into the compressor pulley, which engages and disengages the compressor shaft from the pulley according to signals from the engine control system controller. Refrigerant vapor from the compressor under high pressure enters the condenser located in front of the radiator of the engine cooling system. Passing through the honeycombs of the condenser, the refrigerant is cooled by the counter flow of air and with the help of fans of the cooling system.

Chevrolet Club - Information

First of all, check the flow in the expansion tank at idle. There should be a vigorous flow. If there is no stream, then throw the pump in the trash. The pump must be original, no cheap one will do, it has a smaller impeller. With a non-original or faulty pump, a stream appears in the tank only when you re-gas it.

Pump and test. Lech wrote:. Good day everyone! I would also like to make my small contribution to the forum if, of course, anyone else is interested. Not long ago I had problems with the heater which I solved by replacing the pump. If I posted the topic incorrectly, please correct me.

The essence of my problem was that with the engine well warmed up, the temperature in the cabin left much to be desired. The strong air flow from the heater was lukewarm. Thanks to the respected forum participants, the decision was made to change the pump. Indeed, in my case, the stream in the reservoir at idle was completely absent, appearing only closer to the engine speed. Having removed the pump, it turned out that there was a “hepa” with a small impeller:. The hepa impeller has a diameter of 64mm. The TZA impeller has a diameter of 72mm.

Measuring the air temperature from the heater in the glass mode with a well-warmed engine before replacing the pump showed the following result: After replacing the pump with the original one, a steady stream appeared in the expansion tank at idle speed and the heater air temperature in the same mode on the glass increased significantly: Now I I felt warm, I even unscrew the heat-cold knob to 12 hours, otherwise it’s too hot..

The presence of a wheel on the windshield is especially incomprehensible. What can we now understand from this diagram? Theoretically, nothing blows from there until you put the front in position.

In practice, it constantly blows from the front if the dampers are not treated using the technology below. In short, you need to turn the wheel in the front position. Feel what is blowing from there and never touch it again. Additional airflow to the windshield never hurts. The diagram has errors, but not major ones, the main thing is to grasp the meaning. Treatment using technology improves the overall warming of the feet.

Indications for treatment are:. This bonus significantly increases the comfort in the car interior when the damper is in frosty weather.. Bigfoot wrote a:. Everything works perfectly, now it blows where I want, in the legs of Tashkent it even blows in the legs of the rear passengers. This has never happened before.. It is better to increase the efficiency of heating the legs by eliminating air leaks from the large technological holes podiums for fastening the damper cables, which are installed at the factory no one is fooling around.

The holes are through, air is blown out of them from the stove... Here they are visible in the light. Don’t put the foam rubber too far into them, otherwise the damper will jam the heat and cold. In the photo the largest one is in the center. The flap with its small squiggle on the right can pinch and drag pieces of foam rubber inside. Where else can cold air siphon from?

From the joints of part number 4. Owners of Shniv with a condo can relax or tense up. Because simply removing the glove compartment will not solve anything. But you can check it by removing the glove compartment and rushing through in the cold with a breeze, the passenger can feel everything.. No problems were found with the other joints. Maybe this will reassure owners of Eltse trim levels.

Malfunctions of the stove of the Niva Chevrolet SUV and their elimination

Car heating system

The Chevrolet Niva SUV has a heating system that not only heats the interior in winter, but also cools it in summer.

Its design includes:

Control block;
radiator;
coolant pump;
pipes;
evaporator;
tap;
compressor.

In addition, the design has a resistor and a fuse that are responsible for functionality.

Heating system diagram

Possible faults

Various problems with the Chevrolet Niva are possible: the heater blows cold air, the fan may not work, etc.

The cause of the problem may be the following:

The stove tap does not work;
radiator pipes are damaged;
the additional resistor does not function;
radiator is faulty;
The control unit does not work.

To restore the functionality of the system, you need to know how to troubleshoot problems and repair faulty elements or replace them.

How to fix a resistor?

Before repairing a resistor, you need to make sure that it is inoperative. To do this, you need to turn on the ignition and check its operation - how the air will blow. This device is responsible for the operation of the fan, or more precisely, its rotation frequency. If the fan does not work in the first three speed positions, then the device is faulty.

Checking the device for serviceability

To change the resistor, you need to pull the glove compartment forward without removing it. Disconnect the wiring harness. Next, remove the device and install a new part. After the process is completed, you should check the operation of the fan at different speeds (author - Andre Vladimirovich).

How to change the tap and pipes?

Over time, due to wear and tear, the pipes become unusable and the heater valve leaks. The stove pipe is replaced if it is leaking. If the faucet is faulty, it should be replaced. It is better to replace it with a ceramic product; they last longer than the standard ones. It is recommended to change the pipes along with the tap: over time, they lose elasticity and may leak.

Control block

The control unit contains switches for heating system modes. If it doesn't work, it needs to be replaced. To do this, you need to dismantle the device and replace it with a new one. You can carry out repairs, but in this case you need to understand electrics or entrust the repair to a professional.

Fan

If the fan is not working, check the functionality of the electric motor. Using this device, air is pumped into the interior of the car. To repair the fan, it must be removed. The removed device is checked using the battery. If the motor is not working, it must be replaced. You can completely replace the entire device by purchasing a new device in advance.

Replacing the heater (radiator)

Replacement is carried out if antifreeze begins to leak. The radiator is located behind the glove box, in a niche on the left side of the front passenger's feet.

New replacement product

The procedure includes the following steps:

First, turn off the on-board network by disconnecting the negative terminal from the battery.
Then you need to remove the glove compartment and side panel.
Drain the antifreeze from the block.
Next, unscrew the air duct blowing on the legs so that it does not interfere with removing the parts.
Then remove the cabin air filter.
Having unscrewed the snail, we move the damper body to the side. Then you should disconnect the wires, and take out the volute and motor.
Next, unscrew the evaporator screws and disconnect the hose. Moving the evaporator to the side and gently pressing it to the floor, remove the device.
Then disconnect the pipes. If there are new pipes, the old ones can be cut off.
After unscrewing the two fastening screws, remove the heater radiator from the niche.
We install a new device. Assembly is carried out in reverse order.
Add coolant.

Main stove malfunctions

Stove malfunctions can be very different. The most common reason for its failure is:

heater valve malfunction;
damage to radiator pipes;
failure of the additional resistor;
radiator damage;
control unit problems.

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As a result of any of the above situations, the stove stops working normally.

Warm air does not enter the lower part of the cabin

Before repairing the stove, you should check the temperature of the coolant (coolant). Perhaps the problem is not in the interior heater, but in the cooling system. If the engine warms up to operating temperature (90˚C), then the cause of the malfunction should be sought in the stove.

With the help of damper position regulators, warm air is directed to different parts of the cabin

The dampers should be adjusted first. To supply hot air to your feet, follow these steps:

The engine warms up until the warm air can be felt with your hand.
The heater fan speed switch is set to position 4.
The airflow direction knob turns to the 12 o'clock position and immediately returns to 10 o'clock. Air should begin to flow into the lower part of the cabin.
If the result is not achieved, the procedure is repeated.

This sequence of actions is due to assembly errors. Due to gaps and backlashes, interference is created with air distribution and installation of the damper in the desired position the first time. If after these steps the heat still does not reach your feet, the heating system needs to be modified.

Antifreeze leak from the stove

In used cars, coolant often begins to leak from the stove. The reason for this is usually wear and tear on the pipes or a malfunction of the heater tap. Since antifreeze circulates under pressure, all connections must be tight. However, during prolonged use, hoses and gaskets lose their elasticity and burst. After inspecting the heating system and identifying the leak, the worn part is replaced with a new one. When making repairs, you should not use clamps made in China due to their poor quality.

Due to loss of elasticity, the stove pipes crack over time and leak antifreeze.

Coolant can also leak from the heater radiator itself. In this case, it will have to be replaced with a new one.

The stove doesn't heat well

To diagnose the malfunction, turn on the ignition, start the stove and try to change the intensity of the air supply. If at the first three speeds the air is not supplied or is supplied cold, the cause of this is a faulty resistor that needs to be replaced.

The reason for the inability to switch speeds is the failure of the resistor

If the resistor is OK, the diagnosis continues. Check the coolant level. If it is low, add antifreeze to normal and check it after a few days. If the level has noticeably decreased, you should pay attention to the hoses and pipes, wear of which is usually the cause of coolant leakage.

One of the reasons for poor heating of the interior by the heater may be a low level of coolant in the system

If the control unit malfunctions, it will have to be removed. Repairing the unit at home is only possible if you have the appropriate tools - it’s easier to contact a car service center. Another reason for the stove stopping may be a dust-clogged cabin filter. In this case, the load on the electric motor increases, which, in turn, leads to failure of the heater fuse.

Video: replacing the heater fuse on a Chevrolet Niva

Warm air may also flow poorly or not at all into the cabin due to contamination of the heating system. In this case, it should be washed. This is true when purchasing and operating used cars.

The device of the stove of the Niva Chevrolet car

The Chevrolet Niva is equipped with a liquid-type heater. It supplies warm air to the cabin and cools the engine, overheating of which can lead to disastrous consequences and costly repairs.

Without air conditioning

The Chevrolet Niva heating system consists of the following elements:

ventilation duct;
windshield heating duct;
intermediate body;
air intake filter;
fan;
interior heating duct;
foot heating duct;
heater radiator.

The intensity of the hot air supply is regulated using dampers. The air duct system distributes the heat flow to various areas of the cabin: windshield, side windows, legs, doors, etc. In addition, there is a four-speed air supply switch.

Heating system for the interior of a Chevrolet Niva car, where 1 is the side deflector air duct; 2 — windshield air duct; 3 - intermediate body; 4 - intermediate air duct; 5 — outside air filter housing; 6 — fan housing of the heating and ventilation system; 7 — central deflector; 8 — air duct for blowing the front passenger’s feet; 9 — facing of control units; 10 — front air duct for blowing the legs of rear seat passengers; 11 — rear air duct for blowing the legs of rear seat passengers; 12 — heater assembly; 13 — air duct for blowing the driver’s feet; 14 - side deflector

With air conditioning

The air conditioning system allows you to regulate the temperature and humidity in the cabin. Before turning on the air conditioner, the heater fan is turned on, and the temperature control knob is set to minimum. Almost the entire air conditioning system is located in the engine compartment. Only the evaporator is brought into the cabin between the heater and the electric motor, providing heat exchange between the incoming air and the refrigerant.

Heater and air conditioner diagram, where 1 - heater housing; 2 — inlet pipe of the heater radiator; 3 — heater radiator outlet pipe; 4 — air conditioner evaporator housing; 5 — evaporator outlet pipe; 6 — evaporator inlet pipe; 7 — fan housing; 8 — control cable for the external air supply damper

As the refrigerant moves through the evaporator tubes, it absorbs heat and turns into a gaseous state. The evaporator fins are cooled, and the fan directs cold air into the cabin and reduces the temperature. Gaseous refrigerant from the compressor under pressure enters the condenser, cools and turns into a liquid state. After this, the liquid is supplied to the receiver, and from it to the evaporator reducer, where it again turns into a gaseous state. A new cycle begins.

Causes of poor stove performance

The recirculation lever is removed and the panel trim is removed. Behind the cladding, use a screwdriver to unscrew the screws and remove the backlight bulbs for the instrument panel of the heating system.

The terminal block is disconnected and the bolts securing the rods are unscrewed. The heater damper rods and the heater fan switch are disconnected.

The heater is repaired, if required, and reinstalled in the reverse order. Before you begin removing the radiator, you must purchase a new radiator. Drain the antifreeze from the radiator and remove the air supply filter.

To remove the filter, you need to unscrew the housing screws. Disconnect the power wires for the electric fan and heater. We unscrew the screws securing the fan and the heater itself.

We remove the heating duct, which is designed to warm the feet of passengers sitting in front. Unscrew the 2 self-tapping screws securing the heater and slightly pull the radiator out of the socket.

Use pliers or side cutters to break the upper corner of the plastic radiator flange. When installing a new radiator, first cut off the corner. After installation, seal the hole in place of the cut corner. Turn the fan on to maximum and check for cold air leaks at the entrance of the air duct from the fan to the stove. There is no factory seal and if there are air leaks, cold air will blow into the passenger's feet.

I sealed it with sealant and it became warmer in the car. The old and thin radiator was removed.

New in the process of installation. When removing the old radiator, I was very upset by the amount of coolant with which he filled the heater. I also felt for the damper with my hand through the hole for the radiator and realized that the lever opened it by one percent. I set the damper to the vertical position with my hand, the lever did not react at all.

Interior heater repair

The stove in the Chevrolet Niva is considered one of the most reliable components of the car. However, it can sometimes fail.

Replacing the heater cable

Sometimes it is not possible to change the position of the heater damper. The reason for this is a broken cable. To replace it, you will need a standard set of tools and a headlamp. Replacing the cable is carried out as follows.

The driver's seat moves back.
The handles are removed from the damper control panel and the screws are unscrewed.
The panel is dismantled on the left side at the location of the driver's feet.

To access the cable you will need to remove the heater control mechanism

Using a cable, the position of the air supply flap is changed

Replacing the interior heating control unit

A faulty control unit can also cause the interior heating system to not operate correctly. Its dismantling, necessary for repair or replacement, requires the following procedure.

The negative terminal is disconnected from the battery.
All handles are removed from the heater control mechanism. To do this, you need to carefully pull them towards you.

All handles are removed from the heater control mechanism

Use a flat screwdriver to remove the air circulation lever

Use a screwdriver to pry up and then remove the block lining

Two self-tapping screws are unscrewed under the cladding

The connector with wires is removed from the control unit

After dismantling, the control unit is repaired or replaced with a new one.

Replacing stove pipes

If a coolant leak is detected, the pipes along with the clamps should be replaced. The work is performed in the following sequence:

The coolant is drained from the system.
The screws securing the glove compartment are unscrewed and it is removed.
Use a Phillips screwdriver to unscrew the clamp of the lower pipe. The hose is removed carefully - the antifreeze should not get on exposed skin. If difficulties arise, the pipe should be rotated around its axis.
The second pipe is removed in the same way.
New hoses are installed and tightened with clamps.

If antifreeze leaks, the stove pipes are replaced with new ones.

Video: dismantling the stove pipes on a Chevrolet Niva

Replacing the stove fan

If the fan does not turn on or if strange noises appear when it is turned on, then the electric motor is most likely faulty.

Before removing the heater motor, you need to make sure it is faulty.

The most common reasons for its failure are:

Lack of voltage on the electric motor due to poor contact.
Visible damage to the motor wires due to chafing.
The 25 A fan fuse located in the fuse box number F18 has failed.
Failure of one of the resistors, manifested in the absence of one of the speed modes.
No ignition.
Deterioration of the armature and brushes of an electric motor as a result of long-term continuous operation.

If the electric motor malfunctions, it will need to be dismantled.

In any of the above situations, the electric motor will need to be removed.

Heating system fan repair

To diagnose a malfunction, the electric motor is connected directly to the battery. If it works, the problem should be looked for elsewhere. Otherwise, the electric motor is removed for repair or replacement. It is located under the glove compartment panel in the cabin. After dismantling, the electric motor is disassembled and inspected.

The heater motor may not work due to internal contamination.

The design of the electric motor is quite simple. The reason for its stopping may be contamination, wear-out of the armature, bushings or brushes.

The cause of failure of the electric motor may be wear out of the brushes or armature.

The electric motor is cleaned and reinstalled or replaced with a new one.

Heater radiator repair

The main signs of a malfunctioning heater radiator are as follows:

Coolant accumulates under the floor mat on the driver's side;
there is a smell of coolant in the cabin;
when heated, a greasy film forms on the glass, which cannot be washed off with water;
the stove does not heat the interior well;
The coolant level in the expansion tank decreases.

A coolant leak from the heater radiator must be repaired immediately

If any of the signs are detected, the stove is diagnosed, based on the results of which a decision is made to repair or replace the radiator. More often, car owners install a new radiator. In this case, the system is completely freed from coolant.

When the heater radiator fails, it is usually replaced

Replacing a radiator on a car with air conditioning is a rather complex process that requires special equipment and appropriate skills.

Video: replacing a heating system radiator

Repair and replacement of stove tap

The need to repair the stove tap arises when a leak appears or it is impossible to close or open it completely. The fact is that in the summer the tap is closed, and its elements stick to each other. When you try to turn it off, the tap breaks. Usually it is replaced with a new one.

If the stove valve fails, replace it with a new one.

The tap is replaced as follows:

When the engine has cooled down and the heater tap is fully open, the coolant is drained.
The traction cable and glove compartment are removed.

Solutions to the problem

However, realizing that poor bottom heating is a technical mistake of car developers, drivers still do not want to put up with such a problem and strive to modernize something on their own, eliminating the discomfort that has arisen. In principle, such owners do the right thing. You cannot give in to problems; it is important to look for ways to solve them. If it is difficult to find the right course of action on your own, then by visiting specialized forums, it becomes much easier to come to the right decision with the collective wisdom.

Technical problems

Initially, we suggest that you figure out why such a problem arises on Niva. In this vehicle, the heating and ventilation systems are interconnected. Air penetrating from outside enters the radiator, then it can be heated, and after that the warm flows will be redirected into the car interior. At the same time, the developers provided the vehicle with three main ways for warm air to enter the cabin. It all depends on what position the driver sets the switch:

When the lever is moved all the way to the right, air will penetrate through the upper deflectors.
If you move the lever in the opposite (left) direction all the way, air will flow between the side and top deflectors.
If the lever is installed centrally, the air should be directed directly to the legs, but, unfortunately, in practice this cannot be achieved.

It should be noted that by choosing the first option for installing the lever, the driver will be able to provide a good flow of warm air onto the windshield, helping to quickly remove ice if it occurs. Experienced drivers do not recommend choosing the second option for installing the lever, since in this case the warm air flows will be mainly directed under the dashboard, leaving only “crumbs” to heat the interior.

Solutions

Now that the reasons for poor heating, especially in the lower part of the car’s interior, have become clear, it doesn’t hurt to delve into the recommendations we have proposed, which will guide you towards actions that can completely eliminate the problem.

So, most of all the problem lies in the incorrect operation of the dampers, which do not rotate enough in the right direction, and sometimes close completely. An old bank card will help you solve a technical problem. No, you will not pay off, spend your financial savings. Please note that we suggested that you use the old, no longer needed card. We'll just really need to cut some things out of plastic.

Now remove the decorative panel of the heater, then remove the damper control. While holding this regulator in your hands, remove its lower part. We recommend that you do not make hasty movements, since all parts of this regulator are made of not very durable plastic. It is not difficult to break such fragile plastic structures. Unfortunately, this will complicate your work later, since you will have to use a soldering iron to restore the integrity of the structure.

We recommend: A proven method for repairing an engine without disassembly

Now set the upper flap to the upper position. To forcefully “tightly” secure this position of the dampers, prepare a suitable-sized bracket (you can even cut it yourself), and then secure it with self-tapping screws. Be sure to make sure that the bracket you install creates a real obstacle to choosing a different direction for the lower flap. From the prepared plastic card, cut out a new path for the air flow, singe the edges of the cut out part and introduce them into the structure you have modernized. Of course, after performing these not very complicated steps, you need to return the device to its place, doing all the same steps in the opposite direction.

Unfortunately, while anticipating the joy of high productivity of your own work, you suddenly discover that the air is directed exactly where you wanted it, but at the same time you notice that the strength of the air flow has become less. For this reason, the problem of poor foot heating has not been completely solved. However, we propose to continue some technical changes. Take an old plastic canister, cut out the neck, install it to the deflector, and secure it securely with self-tapping screws. This very simple technical trick will ensure increased flow.

Additional reasons

There are also additional reasons why heating the Niva’s interior becomes impossible. This can happen when a fuse blows due to a short circuit in the vehicle's electrical circuit. Of course, you will have to identify the blown fuse and replace it. In the same way, a resistor can fail; you will also need to remove it and install a new one in return.

If the heater is working, but you are not very happy with the heating power, we recommend checking the coolant level. Oddly enough, a small amount of antifreeze or antifreeze prevents the vehicle from heating well. Sometimes, by pouring in coolant, without following the recommendations, and performing all these actions hastily, the driver himself “airs” the system, which is why the heating power also drops. In this case, it will be necessary to bleed the system to eliminate any air pockets that have arisen in the system.

The following can also negatively affect interior heating:

excessive contamination of the fan;
failure of the stove motor;
thermostat malfunction;
destruction of bearings.

So, if you are attentive to your vehicle, immediately delve into the essence of the problems, eliminate them in a timely manner, following the algorithm we propose, your Niva will last a long time and will delight you with excellent work.

If this happens regularly, then it makes sense to check the wiring. The problem may also be in the fan itself. To test, turn on the ignition and check the voltage at the engine terminals.

If it is missing, you will have to replace the motor.

Naturally, each specific car has its own gaps in the heating system, so there cannot be a single treatment recipe. However, with little effort, without removing the front panel and the entire heater, you can modify the guides for the dampers so that the main flow of warm air is supplied to the feet.

To do this, you need to remove the casing from the console on the driver's side and, if desired, the steering column casing. In front of us, on the stove side, is a die that is responsible for the direction of movement of both dampers, and therefore the direction of air supply.

All that remains is to unscrew the die with the slots, change the shape in the uppermost slot from curved to straight, maintaining the starting and ending points. Having changed the geometry of the movement of the upper damper, it remains to firmly fix the lower one, which is responsible for blowing the legs. It is enough to fix the lever of the lower damper with a self-tapping screw in the position of blowing the legs.

Now there will be constantly warm air in the legs, and its quantity and proportions between the windshield and the legs are smoothly selected by a conventional air direction regulator.

Video How to Remove the Heater Control Unit Niva Chevrolet

air flow direction control knobs;
switch for high-speed fan operation.

After all three switches are removed, arm yourself with a screwdriver and, by prying it a little, remove the air circulation control lever. Now nothing will hinder you; you can easily remove the control unit lining itself. Also, carefully pry it in several places with a screwdriver and remove it. Under the facing panel you will find two screws, which will be easy to unscrew using a Phillips screwdriver. After these steps, you can carefully remove the control unit itself. On the reverse side you will see that a block of wires connected to the speed mode switch is attached to the block; be sure to pull it out too. In the same way, find the block of wires connected to the backlight lamps, and disconnect them too. If your car has an air conditioner, then you will need to additionally disconnect the hoses from the vacuum switch.

A little lower you will find a bracket holding the shell of the damper drive rod. You need to carefully pry it off with a screwdriver. Do the same with the other rods, ensuring that the control unit is completely disconnected.

As you can clearly see, there are no particular difficulties when dismantling the control unit. But you realize that you should not, of course, do such manipulations for the sake of enthusiasm and practical experience. It is often necessary to remove the unit if the backlight bulbs have burned out. Changing them is simple, just spin the socket in the opposite direction, pull it out, change the lamp, and then do all the steps in reverse order.

You also have to disassemble the control unit when you discover that the heater of your Chevrolet Niva does not work or works with serious problems.

Very often the electronic control unit for the stove installed on your Niva fails. In this case, you will still have to turn to qualified electricians for help, since you can remove the unit, but you cannot identify the cause of the problem. To carry out such work, it is very important to have various tools, instruments, testers and devices, and it is also important to have good knowledge of electrical engineering.

So, if you are unhappy with the way the stove works on your Chevrolet Niva, you don’t like the fact that the car’s interior warms up slowly, then act boldly, look for the reasons, solve problems, armed with tips and necessary instructions, and enjoy the good performance of your car.

Upgrading the Niva Chevrolet stove: making it blow into your feet

One of the ways to solve the problem of poor foot airflow.

In some cases, the correct switching method does not work and then you have to modify the heater to achieve full functionality.

The main problem with dampers and ducts is leakage.

We will improve the cracks and eliminate leaks in the stove.

Warm air simply spreads throughout the cabin, escaping through leaks in the dampers and air ducts. Naturally, each specific car has its own gaps in the heating system, so there cannot be a single treatment recipe.

However, with little effort, without removing the front panel and the entire heater, you can modify the guides for the dampers so that the main flow of warm air is supplied to the feet. To do this, you need to remove the casing from the console on the driver's side and, if desired, the steering column casing .

Blowing die

In front of us on the stove side is a die , which is responsible for the direction of movement of both dampers, and therefore the direction of air supply. All that remains is to unscrew the die with the slots, change the shape in the uppermost slot from curved to straight, maintaining the starting and ending points.

A radical solution to the problem of poor foot airflow is to close one damper AT ALL with foam rubber.

Having changed the geometry of the movement of the upper damper, it remains to firmly fix the lower one, which is responsible for blowing the legs. It is enough to fix the lever of the lower damper with a self-tapping screw in the position of blowing the legs. Now there will be constantly warm air in the legs, and its quantity and proportions between the windshield and the legs are smoothly selected by a conventional air direction regulator. This way you can come to an agreement with the Niva Chevrolet stove and make it evenly warm up the interior.

Refinement of the heating system of the Chevrolet Niva

When the intensity of supply of air heated by the heater into the cabin decreases, it becomes necessary to modify the heating system. This is due to errors in the assembly of the system. The main problem is the lack of tightness in the air ducts and dampers. This leads to incorrect distribution of warm air throughout the cabin. The modification is carried out as follows.

The steering column casing and driver's side console are removed.
On the heater side, a plate is removed that sets the direction of air supply.

The die located on the heater side needs improvement

To give the desired trajectory of movement of the damper, you can glue a plastic card to the die

The last stage of modification of the stove is the rigid fixation of the lower damper

As a result, warm air will be distributed throughout the cabin strictly in accordance with the position of the flow direction regulator.

Thus, even an inexperienced car enthusiast can ensure a comfortable microclimate in the interior of a Chevrolet Niva car. To do this, you just need to strictly follow the instructions and recommendations of professionals.

When purchasing a brand new Chevrolet Niva, most car enthusiasts are already in love with this vehicle. They are ready to list all the advantages of the car on their own, without the help of auto center employees. One of these advantages is the quality of the heater. Even in severe frost, the interior warms up perfectly within a few minutes, helping to maintain a comfortable temperature for the driver and passengers.

Unfortunately, sometimes the euphoria from the high efficiency of the stove quickly dissolves and nothing remains of the trail of praise addressed to it. Most often, the reason for this is low-quality components supplied to the conveyor, which ensure equally poor-quality assembly of the stove. As a result of this, Niv Chevrolet owners begin to notice that warm air blows only in one direction, and there is no way to regulate the flow. If you also had to encounter such a problem, then we suggest that you familiarize yourself with our recommendations that will help you navigate where to look for the problem and how to fix it.

Dismantling the stove

The stove is dismantled as follows.

The negative terminal is removed from the battery.
Remove the dashboard, performing the same steps as when replacing the control unit.
The screws securing the heater to the cross member of the instrument panel are unscrewed.
The stove is pulled out from its installation location.

Removing the stove from a Niva Chevrolet car is quite simple

How to understand that the heater motor on a Niva Chevrolet is faulty?

On Niva Chevrolet cars, the heater is turned on from inside the car using a regulator located on the dashboard.

It has four locking positions, one position is responsible for turning off, and the rest for the air blowing speed. Therefore, if when you turn it on, there is no air blowing, or extraneous sounds are heard, this will indicate that the device at least requires maintenance.

Causes of motor malfunction

The main reasons why the stove motor fails include the following:

There is no power to the device. This may be caused by a lack of contacts or a problem with the battery.
There is damage to the motor wires; due to their location in a niche, they may be subject to chafing.
The fuse has blown. This could happen if a current of the largest value from the standard passed through the circuit. It is in the 25A standard. Number F18.
The preliminary resistance has failed. A similar problem manifests itself in the fact that the stove will not work in one of the speed modes.
Problems with ignition. This fact should also not be excluded, because the stove only works when the ignition is on.
The motor and its drive shaft are worn out due to long-term operation of the device.

In any of the above cases, in order to understand what happened to the motor, it is necessary to dismantle it.

The electric motor of the interior heater fan on a Niva Chevrolet car is removed for repair or complete replacement. To carry out repair work, prepare a standard set of tools, turn off the power to the car by disconnecting the minus terminal from the battery and perform the following sequence of actions:

Dismantle the glove box.

We disconnect the block with the power wires from the fan electric motor.
Next, disconnect the air supply hose.

Using a screwdriver, unscrew the three screws securing the fan motor and remove it along with the impeller.

Remove the retaining ring and impeller from the shaft.
Carry out the necessary repairs or replacements, then reassemble and install the engine in the reverse order.

At this point, the repair work to remove the heater fan electric motor on the Niva Chevrolet has been completed.

If only fourth speed works

In cases where the motor refuses to work at the first, second and third speeds, but turns perfectly at the fourth, the same resistor with three isolated windings is to blame. If you can’t buy it, you can try to restore it yourself. True, only in the case when the thermal fuse has blown, naturally, no one will rewind the windings, the game is not worth the candle.

Fan resistor

You can remove and check the resistor without dismantling the engine. This is done like this:

Use a Phillips screwdriver with a short blade to unscrew the rightmost screws securing the glove compartment.
Unscrew the rightmost screws securing the glove compartment.
We gain partial access to the motor, but this is enough to get to the resistor.
Move the glove compartment aside to get to the resistor.
Remove the terminal block and move the wiring harness to the side.
We remove the contact block.
Using a Phillips screwdriver, unscrew the screw securing the additional resistor.
Unscrew the screw securing the resistor.
We remove the resistor from the housing.
Resistor contacts.
We take out the resistor.
We check the integrity of the thermal fuse with a multimeter. If it is faulty, you can try to replace it.
Installation of a new or restored resistor is carried out in the reverse order.

Symptoms of a problem

The simplest situation is when the electric motor does not spin at all. In this case, there may be several reasons:

Failure of fuse No. 18 with a nominal value of 25 A. It protects only the heater motor circuit.
Break, short circuit, damage to the motor winding.
Lack of contacts on the motor power supply block, damage to the wiring.
Damage, freezing or wear of the electric motor brushes.
There is no voltage at the output contacts of the speed switch, the switch is broken.

Connection diagram for the electric motor of the heater fan and the rear window heating element: 1 – ignition switch; 2 – mounting block; 3 – heater motor switch; 4 – additional resistor; 5 – heater electric motor; 6 – rear window heating element; 7 – switch for heated rear window with control lamp; A – to power supplies; K6 – additional relay; K7 – relay for turning on the heated rear window.

Stove fan repair

It is more difficult when the engine turns, but does not develop sufficient speed. This is dangerous because when the rotation of the electric motor shaft is difficult, it consumes much more current, so the fuse may burn out and the winding may fail. Diagnosing a fault in this case requires some experience and the breakdown may not be immediately detected, but a blown fuse will make it clear that there are problems with the motor.

In addition, insufficient motor speed can be caused by an interturn short circuit in the armature winding or wear or clogging of bushings or bearings. It is also possible that the cabin filter is clogged. In the case of bearings or bushings, the engine will make noise during operation, and the noise will increase over time. This can be treated either by replacing the motor, or by lubricating or replacing bushings or bearings.

The cause of increased noise from the stove may be clogged bearings and bushings that need to be lubricated.

The bushings or bearings are lubricated only with a regular spindle and machine oil. Engine oil or grease is not used in this case. A new engine costs about 600 rubles, depending on the manufacturer.

Causes of the problem and solutions

If desired, you can lubricate the travel niches of the crank arms on the control unit with caliper lubricant suitable for temperature conditions for use with metal, plastic and rubber goods. We install the control unit and ventilation in place. Next, we climb to the heater from the side of the driver’s right leg, take a lying position with our body described in paragraph. We install the levers in place and tighten the screws. The screws are installed in order to freely, without interference, fasten the rods with the rod fastening bracket and install the previously removed damper drive bushings without problems and without losses. back, having previously lubricated the outer part with the above lubricant.

After we have secured the rods with brackets and put the bushings in place, we tighten the screws until they stop. I used MC caliper lubricant Initially, prepare tools and some items that will make the task easier.

Since you will have to bend down and manipulate under the bottom of the dashboard, we recommend that you purchase a headlamp or install the flashlight so that its light output is directed to the place you need. It would also be quite appropriate to move the front seat back slightly to expand the space for yourself.

After completing such preparatory work, proceed to direct action.

Chevrolet Niva heater damper repair

DIY heater cable replacement

How to secure the heater damper cable.

Niva Chevrolet heater blows cold air

Niva Chevrolet Niva Chevrolet Replacing the heater radiator

Replacing the interior heater tap without draining the antifreeze. NIVA. All methods for removing the stove tap.

Adjusting the NIVA hand brake. We tighten the Niva hand brake cable ourselves

Spear in the air intake - what happens if you remove it?

Great is Mother Russia for craftsmen! How many minds were born here and created their ingenious inventions, which made it possible to comprehend the laws of aerodynamics and lift hundreds of types of aircraft into the air!

One of the most difficult problems was the lack of oxygen to power turbojet engines at high speeds, when the flow of air into the engine is extremely uneven.

The solution was found in the middle of the last century at TsAGI near Moscow by installing a cone in front of the air intake and eliminating the effect of engine surge. By the way, the first aircraft with such a cone was the famous MiG-21

What's all this for? Moreover, car designers also encountered a similar problem when the engine operating zone exceeded 3,000 rpm. The engine consumes air much more actively and its supply becomes uneven. But there is already a solution! The pipe was slightly expanded and the same air mass separator (restrictor) was installed in it, at the same time significantly reducing the noise from this pipe.

Naturally, this was done not by pastry chefs, but by engineers, having previously measured the required diameter for the inlet port and “taught” the ECU to take the new design into account when operating the throttle valve.

But, domestic drivers are strong in spirit and, imagining themselves to be aircraft engineers, let’s cut the restrictor out of the air duct pipe. They don’t realize that if something didn’t need to be installed on the car, then it wouldn’t be installed! No! Everywhere there are machinations of the decaying West, which wants to strangle their cars with unnecessary gadgets.

Having not felt any positive difference in the behavior of the engine, they joyfully write posts on the Internet about how the car gained fifty horses and urge them to cut out the rest so as not to look like idiots on their own. And then you can reflash it, because for some reason the consumption increases.

Bottom line: if your bad head doesn’t give you rest, disassemble this pipe, take out the restrictor (in common parlance - a spear) and go for a ride. Then put it back.

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