Lada Granta stove: features of the heating system, malfunctions, replacement of components

The stove belongs to the heating, air conditioning and ventilation system of a car. The purpose of its work is to maintain a given temperature and humidity conditions, ensuring comfortable conditions for being in the car and an influx of fresh air. The type of ventilation system in Grant is supply and exhaust. The stove is controlled by simple controls that allow you to change the speed of air flow, its temperature and the direction of blowing: onto the windshield, into the legs, etc. To isolate the interior from unpleasant odors and faster warm-up in winter, an air intake switch for the stove is provided from outside or from the inside.

Heater for Lada Granta - troubleshooting methods and instructions for replacing the device

Motor repair

Quite often the stove starts howling, the reason is a malfunction of the fan motor. The easiest way to fix it is to install a new part. But this is not always a good solution. For many foreign cars, this small engine is quite expensive. If the car is old, then you will have to look for the part at a disassembly site, which is not the best option. Engine repair is not difficult, and can save quite a lot of money for your budget.

To carry out repair work you will need to remove the part. This process can vary significantly between models, so check the manual for your machine. The engine repair itself is carried out in the following order:

First we remove the impeller. It needs to be slightly heated with a hairdryer and tapped with light blows of a hammer;
The rotor is riveted;
Usually, the cause of howling is the burning of the bushing to the shaft and/or lack of lubrication. Remove the bushing. It will have to be carefully knocked out. Apply grease to the shaft, also lubricate the bushing;
The bushing is carefully hammered into place, after which the engine is riveted back. The assembled motor is installed in the car.

All work takes a maximum of a couple of hours (depending on the characteristics of your car). The cost of repairs is almost zero. You will only waste a small amount of lubricant. Conclusion

. Any malfunction of the interior heating in winter makes operating the car uncomfortable. Therefore, the question of why the stove fan only works at speed 4 with the onset of cold weather turns out to be a pressing one. In fact, fixing this problem is very simple; for this you do not need any special knowledge in electrical engineering.

Characteristics of the Grant stove

The standard heating, air conditioning and ventilation system ensures the creation and maintenance of a comfortable microclimate in the car. Its main functions are:

interior ventilation;
preventing moisture condensation on glass;
preventing glass from icing;
heating the interior to a comfortable temperature;
air conditioning in the cabin.

The Lada Granta heating system is a single complex consisting of a large number of components and assemblies. The operation diagram of this system and its structure are shown in the figure.

Heating and ventilation system Lada Granta.

Windshield blower pipes.
Dampers for distributing air flows between the windshield and the passenger compartment.
Deflectors on the dashboard.
Leg warmer pipes.
A damper for distributing air flows between the areas of the windshield and passenger compartment, as well as the driver’s and passenger’s feet.
Stove radiator.
Air filter.
Recirculation gate.
Fresh air intake pipe.
Air intake pipe from the passenger compartment.
Electric fan.
Air conditioner evaporator.
Drainage.
Temperature regulator slider.

According to the Lada Granta heater diagram, the air entering through intakes 9 and 10 is supplied through the air conditioner evaporator to the mixing zone by fan 11, having previously been cleaned by filter 7. When the air conditioner is turned on, the heater is turned off and cold air enters the zone selected by the driver through dampers 14, 5 and 2. If it is necessary to warm up the interior, the air conditioner is turned off and air is supplied inside through the heater radiator 6. The heating time can be adjusted by changing the rotation speed of fan 11.

The rotation speed of the electric fan is adjusted by connecting additional resistors to the circuit of its electric motor. The connection is made through the air speed regulator located on the center console. It has five positions: four speeds and a zero “off” position.

Unlike previous AvtoVAZ models, the Lada Grant does not have a valve that regulates the amount of heat passing through the radiator. The air temperature is regulated by a damper gear motor.

Quick heating of the interior

To do this, do the following:

Turn control knob 2 to maximum heat.
Place the regulator handle 4 opposite the pictogram -
Switch the operating mode switch 1 of the electric heater fan to position “3”.
Open the side and center vents on the instrument panel.
Set lever 5 to the extreme right position - no outside air enters the cabin (recirculation mode).

WARNING
[td] It is not recommended to use the recirculation mode for a long time while the vehicle is moving, as this usually leads to fogging of the windows.

Troubleshooting methods

Heating the car interior directly depends on the proper functioning of the engine cooling system, since the air entering inside is heated when passing through the radiator of the Lada Granta stove. It is necessary to check the coolant level in the expansion tank: a decrease in the amount of antifreeze leads to impaired circulation and insufficient heat exchange. This result may also be due to a leak in the valve on the expansion tank plug.

Insufficient heating occurs due to a malfunction of the thermostat or pump in the engine cooling system. The cause of unsatisfactory performance is sometimes an air lock in the heating system. To eliminate it, with the engine warm, remove the heating hose from the throttle valve assembly. Then you need to create excess pressure in the expansion tank - unscrew the cap and blow into it. In this case, coolant containing air bubbles will flow from the removed hose. Similar actions must be performed with the second hose. This operation should be carried out with great care: antifreeze on a warm engine has a temperature of about 90°C, and when removing the hoses you can burn your hands.

The stove stops heating due to a malfunction of the gear motor that controls the damper that regulates the air temperature. Replacing the VAZ 2190 heater gearmotor can be done with your own hands, however, this is a rather labor-intensive procedure that requires professional experience. The part is located under the hood of the car, and to remove it you will need to dismantle the seals, frill, wiper arms and trapezoid. When replacing a nano gearmotor, it is recommended to check its performance by applying voltage to the corresponding terminals from the battery.

Important elements of the stove design are the heater radiator and the fan that supplies air to it. The heat exchanger must not be dirty, otherwise it must be replaced or repaired.

We carry out diagnostics

If it is cold outside and the interior cannot warm up properly, then you need to check the operation of the cooling system, which has a direct effect on heating the interior.

Coolant level

To do this, you need to open the hood and, with the engine not warmed up, check where the coolant is located.

If its level in the tank is between the minimum and maximum marks, then everything is in order. But, when this level decreases, problems with the tightness of the cooling system are possible, and this leads to a decrease in pressure inside the system. If the problem is not corrected, the stove will not be able to warm the air in the cabin effectively enough.

Thermostat

This is a native Luzar thermostat

We are talking about the possible sticking of the thermostat valves in a position where the coolant circulates only in a larger circle. So, during the cold period, the coolant will not warm up to normal temperature, and therefore the interior will not become warmer.

Thermostat location under the hood

You can verify the presence of this particular breakdown by the fact that the car, while stuck in traffic jams, begins to overheat very quickly. In addition, when moving along the highway at a stable speed, the engine loses its temperature too quickly, if we talk about the cold season. However, even if these “symptoms” are not observed in your car, this does not mean that the thermostat is working properly. It is quite possible that its defect lies only in tangible problems with the interior heater.

For even more complex cases, you can check the pipes that connect to the heater radiator. Normally, one should be hot and the other just slightly warm. If the second of the pipes is very cold, this will indicate that the stove radiator in your car is clogged. It won't be easy to clean it. Most likely, you will have to completely remove the entire stove.

How to change a heater

Replacement of the Lada Granta stove is carried out in accordance with the technological regulations of the manufacturer. But experienced car enthusiasts offer their own schemes for replacing this device, which are successfully used during repair work. First, you need to clear the space under the hood of the car: unscrew the battery terminals and bolts and remove it, remove the throttle body pipes, air ducts, and remove the air filter. After this, you can drain the antifreeze from the engine cooling system.

Work in the interior begins with dismantling the decorative cover of the handbrake: you need to unscrew two screws and release the tunnel fastening on the driver and passenger sides. Now you need to remove the gas pedal by unscrewing three bolts and disconnecting the contact group. Then you should remove the brake pedal mounting pin and press on it, freeing up space for further work. To access the heater radiator, remove the plastic side cover of the dashboard. To dismantle the heat exchanger, cut the pipes in two places.

The cut-off part of the pipes should be pulled out into the engine compartment, then bend the brake pedal and pull the old radiator into the cabin. After installing the new heat exchanger, its pipes are pushed into the cabin from the engine compartment, put on the radiator pipes and securely tightened with new clamps. Further installation of the removed parts occurs in the reverse order. Then the battery is installed and coolant is added.

Additional Tips

However, it also happens that the problem with heating the interior consists only of some small mistakes. Therefore, before you start disturbing the service center workers, check whether all the dampers on the stove are set in the required position.

There is a possibility that it is simply stuck. And, with a significant push, it will be moved from its place.

Often, car owners do not particularly monitor the condition of their car, which can result in various problems. For example, the stove heats poorly or cold air comes out of it. Why? This means something was overlooked somewhere. But don’t be afraid, you can carry out the repairs yourself. But first you need to find the cause of the breakdown.

Check the refrigerant level

You need to start by checking the antifreeze or antifreeze. Such an inspection should be carried out as often as possible; this can save you from many problems in the future.

Attention.

If a leak is discovered, you need to place a sheet of cardboard under the engine overnight, and in the morning you can determine the problem area. But keep in mind that this method only works if the leakage is severe. Otherwise, a more thorough inspection will be necessary.

Let us remind you that in the previous article we told you how to clean injector nozzles with your own hands. This procedure is especially relevant today, when the quality of fuel leaves much to be desired.

First you need to check where the leakage is possible.

1. Check how intact the expansion tank is.

2. Pay attention to the thermostat connections, which have three hoses carrying fluid.

3. Inspect the coolant inlet and outlet hoses to the passenger compartment opposite the engine.

4. Inspect the cooling radiator.

Attention.

If the leak is small, then you can simply let the engine cool and run your fingers along the bottom of the pipe joints.

1. Tighten the clamps.

2. Replace hoses if cracks are visible.

3. Add antifreeze and check how the stove now works.

Attention.

If your car is not the newest, it is better to use antifreeze as a coolant, since it is less fluid, unlike antifreeze.

Blockage in the system

Often an antifreeze leak is accompanied by a “plug” in the cooling system. Then the coolant enters the radiator irregularly, causing the heater to weaken.

To solve this problem, you need to open the tank, remove the radiator cap, warm up the engine, step on the gas, and raise the speed to 3500 rpm. Then the blades will direct the liquid at a higher speed and the plug will come out.

The problem with a poorly functioning stove may lie in the thermostat. When the engine warms up, there is a damper inside it that opens at a certain temperature. When this happens, fluid flows through the radiator, cooled by the fan. Over time, the damper can deteriorate, causing the engine to overheat and the heater to blow cold air.

The thermostat is located at the bottom left of the engine. Three pipes go to it. When the arrow on the gauge reaches the red mark, touch the thermostat (with a glove). If the hose that comes from it is cold, then the damper is broken.

Attention.

You can revive the thermostat using a handy method: take the key to 17 or 19 and lightly tap on the bottom.

There are many channels in the radiator that can become clogged, resulting in reduced heat transfer. You can purchase a new radiator or clean the old one.

Attention.

It is recommended to clean the circulation regularly every 2-3 years.

The heater tap can easily jam. With the first frost the problem can be identified. In this case, the tap simply does not switch to heating mode. Here, only replacing the tap will save you.

If air does not flow from the drainage system at all, then either the damper cables have fallen off or the motor has burned out.

Video. Why doesn't the stove heat up?

Sometimes it is enough to add coolant.

Elements of the Lada Granta heating system

Let's look at the design of the Lada Granta stove in the “Norma” configuration:

radiator;
three air pipes supplying flow to the left/right/central deflectors;
control module;
radiator housing;
rubber seals;
fan;
fan housing;
cables, mechanical rods of dampers;
regulator resistors.

Heater radiator
In the modification with a pre-installed air conditioner, the list is supplemented by a separate air duct, evaporator, and heater unit housing.

Engine Features

Due to the design of the car's cooling system, the engine does not warm up above 80 degrees. The management of AvtoVAZ does not see anything wrong with this; they have an official information letter on this matter. You can read it in the material: What is the operating temperature of an 8 valve engine.

The engine design is as simple as an axe. There are no hydraulic compensators, no sores were noticed. Mostly problems can arise due to malfunctions in the engine management system.

Video of acceleration to 100 km per hour

I haven’t shot my video yet, it’s winter, so we’ll wait for the weather to warm up. That's when I'll post it on our YouTube channel. In the meantime, here's a video from Grantovodov.

Here's another interesting video. It is interesting because the measurement is made using an application with a navigator, which means that the speedometer readings are more accurate if the navigator is well calibrated. Everyone knows that the higher the speed, the more the car’s speedometer lies.

How does a stove fan work?

The main task of the fan is to take air flow from the outside and deliver it to the deflectors.

The fan is activated by a mechanical button, to which a 12 V power supply is supplied. In the Lada Granta version, the fan operates at one of three speeds. The driver selects the most optimal mode depending on the temperature inside the cabin.

Additional resistors Grants

Without resistors, the fan operates at one speed with a stable rpm. There are a total of 3 resistors installed on the board.

When the lever is moved to the first position (three resistors), the fan rotates at the first speed, the very minimum. Transfer to the second position - second speed (two resistors). Transfer to third - third speed (one resistor). The detailed diagram of the stove is shown in the photo.

Air distributor flap

Installed to regulate the air flow coming from the fan to the glass for blowing through air ducts.

Often, deformation and bending of the plastic body under the influence of temperature leads to flow leakage and depressurization.

Temperature control flap

Regulates the supply of warm air flow from the stove heater to the car interior. The wider the damper is open, the greater the throughput of the “channel”, and vice versa, the narrower it is, the less.

Heat exchanger Grants

Its main purpose is to heat the air flow entering the cabin. The heat exchanger is connected to the power unit through two rubber pipes: supply and return for fluid circulation.

The standard location is the central part of the dashboard of the car interior.

Air temperature sensor inside the car

Structurally installed inside a plastic interior lighting lamp. To avoid overheating, the sensor is equipped with a forced airflow system.

The installation is designed so as not to distort the actual temperature readings.

Pipes

Rubber pipes literally permeated the entire cooling, stove heating, and air conditioning system. Without their help, it is impossible to connect sections of highways with each other. Fixation method: with clamps, metal ties.

Reviews

№	Positive
1.	Vladimir: Six months have passed since we bought the car, and there have been no breakdowns in such a short time. The fan refused to start several times, the reason turned out to be a bad fuse contact.
2.	Vasily: I have been actively using the machine for two years, there are no particular complaints, all units are working as normal. Breakdowns happen, like everyone else, but they are minor and can be easily fixed on your own.
3.	Gennady: after two months of the machine being idle, the stove heater began to supply little air. I disassembled it myself, cleaned it, works properly. My recommendations to car enthusiasts: don’t be afraid to repair them yourself.
4.	Kirill: I think that Granta is put together with high quality, the price is affordable for a family with an average income. Provided timely maintenance, no problems arise.
5.	Ivan: after buying the car, I immediately drained the factory antifreeze and bought good imported antifreeze. Now I don’t know any grief, the stove works like a charm.
6.	Dmitry: there were minor defects, I fixed them myself, but they were insignificant and did not affect the performance of the machine.
7.	Igor: I’m happy with the car, there are no major comments, as for domestic transport it’s very good.
Negative
1.	Victor: Over the two years of active use of the car, I contacted the service station several times under warranty. The fan malfunctioned, then the stove heater. Decided to renovate and sell. Renault Logan is several times better than its domestic counterpart.
2.	Vladlen: I’m dissatisfied with Grant’s purchase, I’ve already regretted wasting money several times. The car is not worth the investment.
3.	Gennady: a year and a half since purchasing the car, constant investments, purchase of consumables, repairs at service stations.

Conclusion The stove heating system of the Lada Granta is completely copied from the Lada Kalina. There are no complaints about the equipment, everything works properly. In order for the mechanism to serve for a long time, it is necessary to systematically carry out inspection and prevention.

Heating system control

To adjust the fan speed mode, the regulator has a gradation scale. The car owner independently selects the optimal fan rotation mode.

Heating system regulator in the cabin

Failure of the regulator blocks the operation of the entire vehicle interior heating system.

Interior ventilation and heating system of Lada Granta: checking, adjustment

The type of interior ventilation and heating system is supply and exhaust. The operating temperature of the interior heating fluid is in the range from 90 to 94°.

Warm (hot) air is supplied to the cabin by an electric fan. The feed speed is adjusted by a special regulator, which accelerates (reduces) the rotation speed of the impeller.

The electric motor has four positions:

Air intake follows from the outside through air intakes under the frill in the engine compartment. A filter is pre-installed to clean the flow. Filling: synthetic material.

Air is exhausted through a ventilation window in the rear of the car, behind the bumper.

The heater module is installed in the central part of the dashboard, under the panel. During engine operation, the liquid heats up and circulates along the circuit (water jacket).

The amount of air that comes from outside is regulated by the driver. The flow distribution is also controlled by a damper using a cable drive.

Diagnostics of the stove heating system

We place the car within the perimeter of the repair area and open the hood.
Let's start the engine.
Turn the regulator counterclockwise to the blue sector.
Using the lever, we alternately activate the first, second, third fan speeds.

If the fan does not change speed, then the cause of the malfunction is in the resistors.

If the fan does not activate, then there is a fault in the power circuit.

We carry out diagnostics using a multimeter.

We activate the stove heater damper; if no changes occur, then the damper drive is faulty.
After the engine has warmed up to a temperature of 60 - 70°, turn the regulator lever to the red sector position.
We check the air temperature, it should correspond to degrees. Otherwise, the damper drive is faulty.
If necessary, repeat the procedure by moving the regulator to the blue sector position.

Cooling

To cool the interior air, do the following:

Switch switch 1 (see Fig. 2) of the electric fan operating modes to one of the positions “1”, “2”, “3” or “4”.
Place the regulator handle 4 opposite the pictogram.
In the 3 pushbutton switch block, press the air conditioner switch key. The indicator located on the switch button will light green all the time the air conditioner is operating.

When the air passing through the evaporator cools, the water vapor contained in it condenses. The condensate is drained through a drain pipe under the bottom of the car. If the ambient air humidity is high, a puddle of water may form under the car, which is an indirect sign of the health of the air conditioning system.[/td]

Turning on the air conditioner while the engine is running under difficult conditions (long climbs, heavy city traffic, etc.) can lead to engine overheating. Monitor the coolant temperature gauge: if the temperature exceeds the permissible value, turn off the air conditioner. During long trips in city traffic, the efficiency of the air conditioner may decrease due to the intense thermal conditions of the engine. This is not a sign of malfunction; the air conditioner will operate effectively when driving under normal road conditions.

general information

Grant's cars are equipped with fairly high-quality stoves; the manufacturer equips them with aluminum radiators. The heating system itself is a single complex; in addition to the already mentioned radiator, which acts as a heat exchanger, it also includes other units and components: in particular, a fan, deflectors and air ducts.

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The air ducts are designed to supply air flow from the heater to the windshield vents and to the vents on the dashboard. They also supply air to the air ducts, which ensure its transmission to the feet of the people in the cabin.

While the car is moving, air enters the heater thanks to the holes located in the windshield trim. To increase the power of the air flow entering the cabin, both at the time of movement and during parking, a fan should be used, the rotation speed of which determines the intensity of its supply.

The uniform flow of air inside the car is ensured by an air temperature sensor, the inlet of which must be protected from any contamination. Special switches are provided to control the speed and direction of incoming air. In addition, with their help you can determine whether cold or heated air will come out of the heater.

Remember that the stove does not tolerate violations of operating rules, since each of its elements plays its own, very important role in the operation of the entire heating system. That is why the malfunction of any of its components will disrupt the normal functioning of all the others, be it a broken radiator or a failed tube.

Why is it necessary to change the oil in the Grant engine?

As a result of engine operation, the oil “ages”: contaminants accumulate in it, additives “work”, interacting with metal parts, air and combustion products. The oil itself gradually oxidizes, losing its properties and ceasing to perform the functions listed above. “Old” oil:

heat dissipates worse, bearings overheat and wear out more intensively;
loses its lubricating properties, which leads to increased friction in bearings and cylinders;
reduces its protective anti-corrosion properties;
accumulates combustion products, clogging the oil channels with them.

As a result, the engine life is significantly reduced, and there is a possibility of premature bearing failure followed by a major overhaul of the engine. Therefore, timely oil changes in the Grant engine are necessary.

How often should you change the oil?

The frequency of replacement does not depend on the time interval, but on the mileage of the car. The first oil change on a LADA Granta is performed after a mileage of 3000 km. This is due to the fact that the engine must be run-in. Subsequent replacements should be performed after 10-15 thousand kilometers.

What kind of oil should be poured into the LADA Granta?

According to the recommendations of VAZ designers, engine oil for Grant must correspond to groups SL or SJ according to the API classification, and its viscosity must correspond to the climatic conditions and operating characteristics of the vehicle.

How much oil should be filled

The popular “Granta” is available in two variations - with manual and automatic transmission. In the first case, when replacing, you will need approximately 3.2 liters of oil, in the second - 4.2 liters.

Note: The lubrication system holds a slightly larger amount of oil, but when replacing, some of the old oil remains in the engine.