Heater VAZ-2109: diagram, device, principle of operation

Heating the interior of any vehicle is an indispensable condition for its operation in the cold season. Firstly, a warm interior provides the driver and passengers with comfort when moving, and secondly, a properly functioning stove is the key to safe movement, since the warm air that is constantly blown on the car windows prevents them from fogging up and freezing, completely blocking the driver’s visibility. There is probably no point in saying once again that a faulty heating system in a car makes it impossible to operate it in winter. Therefore, it is extremely important to always maintain the VAZ-21099 heating device in good condition. Without knowledge of its functional and structural features and the purpose of each of the components, there can be no question of proper operation and repair of the stove in a car.

We will conduct a small educational program in this publication, where we will describe in detail the diagram, design, features of the VAZ heater, and share with car owners some secrets of the device that will help them operate it for a long time without interruptions.

Let us immediately note that the layout and design of the VAZ-21099 stove on cars with a high panel is no different from a low-mounted torpedo. The only difference is the location of the interior heating controls and the length of the traction connection between the actuators (heater dampers) and control elements (controls on the panel).

What to do if the VAZ-2109 stove does not heat well

With the arrival of winter, many owners of "nines" are faced with the problem of heating in the cabin. Sometimes the stove produces an air temperature of 5-10 (rarely 15) degrees Celsius, and this is with 90-degree coolant! In such a situation, windows, including the windshield, often fog up, which significantly affects visibility. And this trend is observed in almost all domestic cars.

Therefore, the owners of such machines often finish this device, as they say, bring it to mind. So, let's figure out what to do if your stove doesn't heat well or doesn't work at all. VAZ-2109 is a model in which this problem is completely solvable. Causes of failure and their elimination Most often, this part malfunctions due to the lack of coolant in the engine system, which is strictly unacceptable even in the summer. But anything can happen on the road, and even if you have poured this liquid into the tank, you should not relax, since the VAZ-2109 stove can break at any second due to a leaky container.

Therefore, from time to time, pay attention to the presence of antifreeze in your car. Also, the cause of a breakdown or the supply of cold air instead of hot air can be a clogged system.

The VAZ-2109 stove should not have any contamination. And to prevent this, you should check it annually before the start of winter for the presence of foreign bodies in the form of fluff, dust and leaves. A heating radiator can also affect the smooth operation of this mechanism. In order to make sure that it is working or not, you need to measure its temperature during operation. To do this, simply touch its surface with your hand.

If the radiator is hot, then the VAZ-2109 stove will work well, but if, on the contrary, it is cold, the breakdown must be repaired immediately. Most often, the air plug in the radiator breaks. In order to enjoy the warm air in winter again, you need to raise the vehicle to some height (this could be an overpass or a curb).

After the front axle has become higher than the rear, you need to put the car on the handbrake and let the engine run at medium speed for at least 1-2 minutes. But if this does not help, then the failure is due to a leak in the system. Here, improvised methods will not help - you need to go to a service station without hesitation and check the radiator for chips and holes. And the best thing, of course, is to replace such a spare part, and then the VAZ-2109 stove will work for a long time.

How to choose a heater radiator 2109

All commercially available heater radiators are divided into three groups:

Copper stove radiators. An excellent opportunity to tune the stove, because copper has good thermal conductivity, but the most valuable thing about copper radiators is that they can be restored. If you approach the process of repairing and cleaning a copper radiator correctly, it will last almost forever. I don’t dare call it expensive, because with a difference in price from the standard one of 500-800 rubles, the effect and subsequent operation will confirm its unconditional superiority over aluminum models. A copper radiator is a little heavier than an aluminum one, but compared to the junk that we constantly carry in the trunk, this is not weight.
Aluminum heater radiators 2109. A good replacement for a copper-brass radiator if the replacement budget is no more than a thousand. This money will also include a lightweight aluminum radiator and pipes with clamps. The bad thing about aluminum models is that they are prone to corrosion, heat up quickly, but cool down just as quickly. Okay - price. For 800 rubles you can buy an average quality radiator, the only caveat is Luzar radiators. In terms of price, they are in the middle range, and the quality of the enterprise floats, as does the equipment. In addition, judging by the reviews, they tend to develop microcracks that are invisible to the eye, but the antifreeze, which will invariably evaporate from their surface all winter, will give the interior a unique aroma and the eternal mystery of “where does the antifreeze go.”
This category includes cheap radiators without a clear name of the manufacturer; we would not recommend dealing with them, despite the attractive price. Such a radiator can cost no more than 500 rubles, but if you look closely at its design, you can see a number of differences that lead to a decrease in the area of useful airflow. and the material used in their manufacture is another mystery.

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Comments 52

You shouldn’t have bought a new type of stove, the old type of stoves are cooler, there’s a metal partition, I installed one for myself, it heats perfectly. True, my controls are not mechanical, I plugged in a priory with geared motors and now there is climate control, I can honestly say, there have already been frosts and the heat is not shabby, the only negative is that the air ducts in the legs, on the europanel and this stove are somehow not They fit together, and in the end it blows half of the air under the panel)) the main thing is not to forget to tape the heater radiator in a circle at the ends when you install it. By the way, I just left the faucet open and don’t control it, I tested it in the summer, the heat doesn’t come out, so the damper is enough)

Why does the stove blow cold air?

If the heater radiator on a VAZ-21099 has stopped heating, most likely the coolant circulation in it has been disrupted. This problem is also caused by a number of reasons, let’s look at them:

It is quite possible that the coolant is outdated and, as a result, has lost its properties. Note that its service life is approximately five years. If during this time the antifreeze or antifreeze has never been changed, their structure begins to deteriorate with the formation of sediment, which, settling on the cooling lines, interferes with the normal operation of the system. This sediment also clogs the radiator, pipes and pipes of the heater, causing it to stop functioning normally and giving off heat. Therefore, it is necessary to free the system from the old cooling fluid by completely draining it, and then flush it using a special flushing compound. This liquid is poured into the cooling system, after which the power unit starts. The manufacturer indicates on the packaging how long it takes to use the flushing compound in the system with the engine running before draining it. After the flushing has been drained (it usually comes out of the system quite dirty), new coolant should be added in accordance with the manufacturer's instructions and the heater's performance checked. If after this the stove still does not heat, then its radiator is clogged. If, after cleaning and washing it, performance is still not restored, you will have to buy a new radiator.
One of the most vulnerable elements of the cooling system is the heater valve, which is controlled from inside the car using a special lever on the heater panel. The lever and faucet have a traction connection. It is necessary to check the functionality of the faucet. This is done like this: we move the lever, while controlling the opening and closing of the tap. If the faucet remains motionless or does not open/close completely, then the draft needs to be adjusted.
The VAZ-21099 stove heats poorly or does not work at all due to a drop in the antifreeze level in the cooling system. Because of this, air accumulates inside the heater radiator, and it practically does not function (it gives off little heat). To eliminate this, you only need to replenish the level of “cooling” in the system and constantly monitor it.
Airiness in the cooling system of the power unit is also a common cause. The carburetor has a heating pipe, which must be disconnected, since it is the highest point of the system, and accordingly, an air lock forms there. The next step is to free the system from air; to do this, remove the cap of the expansion tank and blow it out. Air will begin to escape from the hose that was previously removed from the carburetor, but as soon as coolant flows in instead, the hose must be put back in place. Air in the system has been eliminated.
The cause of the malfunction of the VAZ-21099 heater may be a failed thermostat, because of which the power unit does not reach the required temperature (90 degrees).
Failure of the pump deprives the cooling system of fluid circulation. At the same time, the engine boils and cold air blows from the air ducts. In this case, it is recommended to replace the pump.

As you can see, there are several reasons for poor operation of the stove in the VAZ-21099, and each of them is a consequence of other malfunctions.

What to do in case of depressurization

If there is a flood in the cabin, then first of all you need to move the crane control handle to the extreme left position. This will save you from scalding, engine overheating and the need to buy another bucket of antifreeze. If the valve is closed, but coolant flows out from under the torpedo, it means that the supply pipes, hoses, or the valve itself have burst. In this case, you need to urgently stop, turn off the engine and either take the car to a service center, or get the necessary tools from the trunk and begin repairs.

To determine the scope of work, you should find out the cause of the leak. First you need to look under the torpedo with a flashlight. The simplest option is that if the supply hose bursts, it will be immediately visible. Replacing it takes minutes if you have a repair kit and a screwdriver. However, the most common cause of heating system leaks is cracks in the radiator housing. Replacing a stove radiator is not an easy task.

Failed part

In the engine cooling system, the interior heater is located immediately after the cylinder block jacket. All particles washed off the walls of the block enter the radiator tubes and over time clog them severely. The coolant enters the stove under high pressure, and due to congestion, this pressure increases even more and penetrates worn areas. Reality confirms the theory: where it is thin, it breaks.

The depressurization of the stove is usually the fault of the car owner himself, who did not carry out an inspection in time, did not clean the device, or did not replace the hoses. This must be done at least once every 3 years.

Air lock formation

The stove on the VAZ 21099 may not heat up due to the formation of an air lock. This happens when the engine cools down after a long trip. Air accumulates in the radiator system, which subsequently goes to the thermostat. After restarting the engine after a few hours, this accumulated air enters the radiator and forms an air lock.

To get rid of excess air, you first need to unfasten the heating pipe from the carburetor, since airiness forms in it. Next, we free the system from the air lock: remove the cap from the expansion tank and blow it out. Air flow should come out from the previously detached hose, and then coolant should flow. When liquid starts flowing, attach the hose in place.

SubaroMows 01/25/2012 — 13:06

How the stove works: the coolant passes through a radiator, which consists of very small tubes and plates for heat transfer. The coolant is heated by the engine, goes to the radiator, the radiator plates heat up, the fan blows and the heat from the plates moves throughout the cabin through the air system. How to check: 1. Checking the temperature of the radiator: Without removing the panel, you can put your hand under the bottom and feel how hot it is. It should be such that the hand cannot tolerate it. If it is hot enough, move on to the second point. If it is cold, or is eaten warm, it is clear that the heat will not flow off it very well. see point 3. 2. If the radiator is hot, just hot, then naturally if you blow hard on it, hot air will come out. The whole trick here is to blow on it, and accordingly we are limited to the operation of the stove fan. It is not difficult to check it; we look at how powerful the air flow is; just put your hand on the air outlet from the stove. If it is blowing, then the problem is in the fan. 3. If the radiator is not hot: Problem with coolant flow through the radiator. Well, since Hiro replaced him, we rule that out. The problem of coming oh. fluid to the radiator: this work is performed by the faucet and pipes (those that lead from the faucet to the radiator and those that go from the engine to the faucet. We take and touch the pipes in the engine compartment that go to the engine, they should be hot, it’s also impossible to hold your hand. If they are hot, then the problem is in the faucet or the pipes that lead from it to the radiator. If they are cold, then either they themselves do not work, or the engine produces warm liquid. See point 4. 4. If the engine produces warm liquid, then this fluid is probably has time to cool down in a small circle. And this is possible if the fan in the engine compartment turns on earlier than usual, in theory it turns on when the coolant temperature is 92-95 degrees, this is normal, but if earlier then the problem is in the temperature sensor

The check is not difficult, you can do everything yourself.

Repair and scheduled maintenance of the stove for VAZ 2109

Speaking about repairing the stove on a VAZ 2109, it should be noted first of all that most of the problems with this unit can be avoided by carrying out scheduled maintenance. It is its absence that causes sudden breakdowns at the most inconvenient moment (cold season).

The most important points are as follows:

Regularly inspect air ducts and dampers - remove accumulated debris, clean the cabin filter, check the functionality of the dampers.
If the seals on the dampers are worn out, they need to be replaced as soon as possible.
When the dampers do not close tightly, you need to tighten the control traction cables.
Antifreeze needs to be replaced regularly. The specific period depends on the brand and here you need to follow the manufacturers’ instructions.
The tubes and the radiator itself need to be cleaned only with special branded liquids. Any amateur activity, for example using a sewer cleaner, will lead to failure of both the rubber tubes and the metal radiator (it will simply dissolve).
The easiest way to remove a leaking faucet or not allowing antifreeze to pass through at all is to remove it from the system or replace it with a more wear-resistant tap. But in this case, it will become impossible to control it from the cabin through the rod and lever.
The antifreeze level in the expansion tank must always be maintained at the proper level and when it drops, add what is missing.

Diagnosis of the reasons why the stove heats poorly on a VAZ 2109 should be carried out at medium engine speeds. The air temperature from the stove nozzles should reach 80-90 degrees Celsius in 5-10 minutes. Warming up the interior to +5 degrees from -10 degrees occurs in 10 minutes of operation of the stove.

Possible breakdowns of the heating system

The main reasons why the VAZ 2109 stove does not heat well are interruptions or breakdowns of three components of the heating system:

Radiator

Fan

Air ducts

Damage to the air duct assembly. The air ducts consist of plastic casings and large-diameter corrugated tubes. The flow of air through them is regulated by dampers. Seals protect against leakage of warm air or penetration of cold air. Problems in the operation of this unit most often arise when it becomes clogged with foreign particles of debris and dust. In this case, after inspection, the air ducts simply need to be cleaned of dirt. Another vulnerable part is the duct seals and dampers. The former can dry out and wear out - this leads to loss of tightness and leaks of warm air. The dampers often do not close completely. As a result, cold air penetrates the system and heating also does not occur.

Fan assembly failure. The rotary-type blower fan on the VAZ 2109 is powered by electricity from the on-board electrical network through a ballast resistor. The switching itself and the rotation speed are regulated by the vernier on the control panel - it is located on the left side of the valve levers. Most often, the fan itself or the resistor burns out. If this is detected, they need to be replaced.

Advice! In a home garage, failure of these electrical parts can be detected by testing them with a multimeter.
Radiator unit failure. This unit includes, first of all, the radiator itself, a temperature sensor (located between its plates), pipelines, and a motor pump (pumps antifreeze into the radiator and discharges it into the expansion tank).

Failures related to this unit, and leading to the fact that the stove does not heat well on the VAZ 2109, come down to two groups:

clogging of the internal volumes of pipelines with antifreeze deposits and other pollutants
mechanical wear of rubber tubes, the radiator itself and the pump motor.

Their determination is possible after disassembling the system and inspecting its individual parts:

Are there any problems with fluid flow?
are there any cracks or chips?
Is the pump pumping liquid?

Basic malfunctions and methods for their elimination

There can be many reasons for the malfunction, here are the most common ones.

Warm air does not flow well into the cabin or does not flow at all

Malfunction of the fan or switch handle - one of the common reasons is a breakdown of the electric motor of the fan, wiring, or switch handle.

Test methods - to check this fault it is necessary; turn on the vehicle ignition, turn the control lever to the first position, listen.

The sound of the fan should be audible in the cabin, if not, then you need to open the hood and listen there. If the sound of the fan is not heard, the reason is in it or the switch.

Troubleshooting - remove the fan motor, check it, if it is fixed, check the serviceability of the wiring and the switch handle and fix the problem.

Malfunction of the air ducts - if the fan is working, but the air does not enter the cabin.

Test methods - to check, you just need to turn on the heater fan, open the air ducts and check with your hand one by one whether air is supplied to the windshield, side windows to the feet and the top of the driver and passenger.

Elimination - you need to check the air ducts; most likely they are clogged with dust, leaves or fluff. If again air does not enter the cabin, you need to check the functionality of the air duct dampers.

Cold air is blowing from the stove VAZ 2109, 21099

On a frosty winter day, going on a long trip, planning that this trip will be comfortable thanks to the stove, turn it on and... be horrified, because cold air is coming from the stove! What to do in such a situation?

The simplest way to solve the problem is to tighten the radiator damper cable. It can be found on the radiator housing, located near the gas pedal.

Front-wheel drive VAZ models often experience a breakdown such as incomplete opening of the heating tap. Diagnostics is carried out by comparing the temperature of the radiator pipes. In the case when the temperatures differ, we can say with confidence that the tap is not closed completely, which is why cold air is blown out instead of warm. The solution to the problem lies, again, in tightening the valve control cable and adjusting it.

It also happens that the air pumped by the stove escapes through the cracks in the air vents. Leaks lead to this problem. A simple sealing of the seams will help return everything to normal and again enjoy the warmth of your favorite stove.

Antifreeze leak VAZ 2109

Antifreeze leakage in the ninth VAZ model is one of the most common problems. This suggests that, first of all, you need to work on the cooling system; it’s time to change the pipes.

But why does the release occur?

Firstly, this may well be trivial wear and tear of components. As a rule, hoses and pipes fail to work properly, since they are made of fragile material in VAZ cars.

Low quality parts, as well as defects and wear, directly affect the health of the radiator. Components from a careless assembler lead to multiple problems that have the most detrimental effect on both the heating system and the entire operation of the car.

One of the most vulnerable elements of the stove is the expansion tank. Plastic, this word alone makes one suspicious, is not able to withstand such powerful loads that fall on this part, which is certainly important for the car. And, if many foreign cars are equipped with a reliable, durable tank, the domestic manufacturer has not yet thought of this trick and year after year produces cars with a plastic tank that regularly becomes incapacitated. It is useless to repair it; it is easier to replace it with a new one.

Now it’s worth figuring out how to determine the release of coolant.

If oil stains remain under the car when parked for a long time, there is no doubt that antifreeze is leaking.

This problem can also be determined by the smell: during normal operation of the car, the interior should never smell of it.

Sometimes you can see white smoke coming out of the exhaust pipe. Poor quality gasoline? It’s possible, but more likely it’s an antifreeze leak.

You can prevent breakdowns by regularly checking the condition of the car and its components for wear, especially the timing belt.

Now that all the basic m are known

points regarding the malfunction of the VAZ 21009 radiator, you can safely try your hand as a car mechanic. A little skill, patience and a detailed description of the diagnostic procedure will help you avoid mistakes and unnecessary expenses at the service station.

Good luck on your journey!

Checking the functionality of the heater elements

The first step is to test the fan. To do this, you need to turn on the ignition, and then start the fan by setting its switch to the first speed position. If it is working properly, the sound of its operation should be clearly heard. If the cabin is quiet, open the hood and listen to the sounds of the fan in the engine compartment. If the heater fan is “silent,” it means that you will have to remove it from the car and have it checked by an auto electrician, or, if you have the appropriate knowledge, check it yourself.

If during the inspection no faults were found with the fan, it is installed in place, and air still does not blow from the stove, the cause of the problem should be looked for in the wiring. It is necessary to determine why there is no voltage supplied to the terminals of the fan motor and to fix the problem. When the VAZ-21099 stove does not heat, even if the fan is working, the reason for this should be looked for in other elements of the heater.

The next step in troubleshooting is to check how well the heater air ducts are working. It is necessary to open them all, and, one by one, raise your hand to check the air flow on the windows, into the feet of the driver and passenger, and into the car interior. The air flow should be felt well. If all the heater air ducts are open and there is no airflow from them, you will need to disassemble the stove itself and look for the causes of the problems there.

Operating principle of the furnace system

As soon as the temperature outside the window drops below zero degrees, coolant in the car begins to flow directly through the furnace tap. After the engine warms up to the optimal temperature (about ninety degrees), antifreeze will begin to flow into the radiator.

Inside the car there is a special lever on the panel that is responsible for turning on the ventilation system. In the VAZ 21099 it is equipped with three power modes. You can also select the direction of the air flow. The air is directed using shock absorbers located at different points in the car.

Heating system VAZ 21099

Replacing the heater VAZ 21099

It is more correct to say that the car heating system is a kind of unit endowed with:

An electric motor with a fan that supplies hot air to the interior of the car;
A resistance system that ensures proper operation of the fan (provides the required fan speed);
Button to turn the heater on and off;
The stove radiator through which the coolant passes.

Main stove malfunctions

As we have already mentioned, the stove is connected to the internal combustion engine cooling system. Accordingly, heating problems may arise for the following reasons:

Insufficient amount of coolant in the system.
Clogging of radiator tubes.
There are air pockets in the system. To eliminate them, you will need to unscrew the cap of the radiator or expansion tank and let the engine idle for a while.

There are a number of cooling system malfunctions that can also affect the performance of the VAZ-2109 heating system. We look at the most common ones.

The weak point of the heating system is the valve through which antifreeze enters the heater radiator. This unit may leak. In this case, it must be replaced with a new one.

Poor quality coolant causes damage to rubber pipes due to its aggressive chemical composition.

Check the condition of the pump, which is responsible for pumping antifreeze and circulating it in the cooling system.

Poor operation of the stove can be caused by incorrect operation of the electric motor that drives the heating system fan.

If you notice extraneous sounds in the operation of this motor, this is a signal for a number of problems:

Possible overheating due to fuse failure.
When operating at low speeds, warm air does not flow - the electric motor has failed or there has been a break in the electrical circuit of the heating system.

Check the condition of the heater core regularly. It can become clogged during operation, and this provokes an insufficient supply of antifreeze. To carry out preventive work, you need to dismantle this element and wash it. If the part cannot be cleaned, then it is better to buy a new one and replace it.

Experienced car enthusiasts claim that the problem of poor operation of the stove may be a loose fit of the damper. Because of this, cold air from the street enters the cabin, and warm air goes to the feet. To solve this problem, just adjust the damper using a special control lever. It is located next to the gas pedal. Use pliers to tighten the cable that goes to the damper. Make two turns around the head of the bolt that secures the cable to the control arm.

If these steps do not help solve the problem, then inspect the joints of the pieces of foam rubber or plastic. Perhaps cracks and gaps have formed there. You can solve the problem with the help of sealant or simply change the insulation.

Replacing the stove radiator

VAZ 21099 heater radiator replacement

However, a common cause of malfunction is not the stove itself, but the heating radiator. Its replacement will be discussed below.

Preparation

Replacing the heater radiator VAZ 21099

Replacing the heater radiator will require the preparation of two containers. You can put plastic in one of them, screws and nuts in the second. In addition, you will need:

Replacement algorithm

Remove the trim located at the top of the torpedo;
We find the bolts that secure the dashboard.

Note. It is also necessary to prepare a container for coolant, which may unexpectedly leak from the radiator. The approximate volume of the dishes is 7 liters. It would be enough.

The stove tap closes;
The stove is set to the “cold” position;
The car engine must also be cooled;
We find the radiator mounts and unscrew them (there should be three of them);
Raise the rod located above the radiator;
We remove the stove pipes, placing a container under them.

Attention: when the first pipe is removed, about 200 grams of liquid should flow out of it. It is recommended to use clean dishes so that the leaked antifreeze can be refilled into the system in order to save money.

The first pipe will need to be closed with something, and then the second one will need to be removed;
Now you need to dismantle the radiator.

Note. As a rule, dismantling the radiator is not difficult. It moves without problems, although the edge of the torpedo may get in the way. To avoid obstacles, it is recommended to raise the edge of the torpedo slightly and rest your back against the lower edge of the torpedo. Then you need to move the radiator to the lower mount, located on the passenger side of the seat, and only then can it be easily removed.

Replacing the heater radiator on a VAZ 21099

Before installing a new radiator, you should attach the foam rubber sold in the kit around the entire perimeter:

We install the new radiator in the stove body;
We put the pipes back on;
We connect the parts using clamps.

Attention! Don't forget to tighten the clamps after a couple of days to avoid coolant leakage.

We lubricate the fittings on the radiator with silicone glue, and then put them on the pipes.

The replacement of the heater radiator is now complete. While working with your own hands, it will be useful to study a lot of photo materials on the topic. The step-by-step instructions presented above are not the only ones. If anything is unclear, you can find the information you are interested in on the Internet. The main thing is to carry out the work yourself, because there is nothing complicated about it, and in the service station the price of such services is very high.

The heater does not work on VAZ 2108, 2109, 21099 cars, reasons

Many owners of VAZ 2108, 2109, 21099 cars are familiar with the situation when, after turning on the electric motor of the heater fan (“stove”), it does not work or works, but only at the highest or lowest speed. Let's look at why this happens and what to do in such a situation.

Causes of failure of the heater fan electric motor - “stove”

— Heater speed switch is faulty

The simplest thing is that its back part (a round chip with several contacts) has moved away from vibration, or the contacts in it or on the switch itself have oxidized. The switch connection should be restored and the contacts should be cleaned. To do this you will have to disassemble part of the front panel.

— The “ground” in the electrical circuit for turning on the electric motor of the “stove” has disappeared

On VAZ 2108, 2109, 21099, the negative wire comes from the electric motor itself and is attached next to it to the car body. We clean the contact to restore ground.

— The wiring of the electrical circuit for turning on the fan motor is faulty

Perhaps the connecting block has simply come loose or the connections have oxidized. In the worst case, there is a “break” in some wire. Using the diagram we find the problem area.

— The electric motor itself is faulty

First of all, the brushes of the electric motor and its commutator (to which they are pressed) are suspect. Brushes may be worn out or damaged and may become stuck. The collector wears out or becomes dirty. In any case, it is necessary to remove the heater motor, disassemble it and check for a malfunction.

Replacement instructions

In most cases, the reason lies precisely in the radiator device, so below we will talk about how to replace the VAZ 2109 heater radiator.

How to change the unit on cars with a high or low panel, read on:

The device itself is located at the passenger’s feet, under the glove compartment. The replacement procedure will be identical for cars with a high and low panel, only in the first case you will have to remove the passenger seat. After removing the chair, you can see the screws on the right that secure the panel; they need to be unscrewed. The panel itself needs to be slightly pulled towards itself; insert some kind of spacer, for example, a wooden beam, into the gap that appears.
Fully tighten the tap, and place a rag under possible coolant leaks.
Then open the engine compartment and unscrew the cap on the radiator unit. The last unit is located between the glove box, as well as the lower shelf below it. The steps you need to follow next must be completed as quickly as possible, otherwise the coolant may spill. The lines that come from the radiator device must be closed; this will require plugs. Reach your hand through the detached center console, disconnect the lower line and plug the hole with a plug as quickly as possible.
Repeat similar steps with the upper hose.
The radiator is removed after all consumables have been drained. A new device is being installed.

Some car owners believe that if the backlight on the center console in the heater area disappears, this is due to the operation of the stove. Remember that the backlight of the stove has nothing to do with the operation of the unit as a whole, so if the backlight has disappeared, you need to find an open circuit and repair it.

Sorry, there are no surveys available at this time.

It is no secret that its service life and reliability of operation largely depend on how an item is handled. This is perfect for a car heater. The more correctly you operate it, the better and longer the stove will be able to work.

There are a few simple rules that, if followed, will extend the life of this unit.

During cold weather, control the stove in two modes. First, start the car, set the control to “All on glass”, and while driving, switch to directing the heat to your feet.
Do not block the air supply nozzles.
Carpeted interior floors will require you to aim the nozzles higher.
Try to always keep the glass clean.
Use air conditioning in damp weather.

Choosing types of radiator

The stove taps are all the same, but the heater radiators come in three types:

copper;
aluminum original (DAAZ);
aluminum Chinese.

Stove heating valve

The best of them are original ones, produced in Russia, at the DAAZ plant. They have swirlers that ensure the interior is warmed up even at a coolant temperature of 60°. Copper radiators are stronger, they can be soldered in case of breakdown, but with them the interior warms up only at 80-85°. The worst option is Chinese radiators. They are very fragile, they do not have swirlers. With them, the cabin is warm only if you are standing in a traffic jam or turning the engine above 2500 rpm.

Now the main secret: why are car owners who have an interior with a high panel so lucky? Everything is very simple. First, they don't have to fiddle with choke and speedometer cables. Secondly, if you need to replace the heater radiator, just remove the steering casing, unscrew all the screws securing the torpedo and simply move its right edge further into the cabin. Everything is ready, you can remove the radiator.

There is also a radical way to provide access to the system parts: carefully cut off the bottom shelf of the panel and screw it back with screws. Now you can simply unscrew it whenever you need access to the stove. Assembling the interior heating system and dashboard must be done in the reverse order.

As you know, on a VAZ 21099, replacing the heater is the most important procedure. Not only the normal operation of the stove and heating of the car interior, but also a number of other significant processes depend on this. Replacing the heater in a VAZ 21099 is not such a complicated job, and you can handle it yourself. It’s probably not worth mentioning that first you need to determine the operating principle of the system in order to be able to competently carry out the replacement yourself. Knowing the principle also allows you to correctly judge a possible breakdown.

DIY repair

To carry out repairs yourself, you need to use the following tools:

a Phillips head screwdriver;
10mm wrench.

When dismantling, you need to remove the plastic trim, which is located on the outside of the windshield. To remove it, you need to open the hood and remove the 5 bolts that secure the trim to the body. Remove the rubber seal from the engine compartment and pry the casing with a screwdriver to get to the motor and oven fan. Now you can remove the motor. It is attached to the body of the VAZ 2108 with two bolts.

When the clamps are disconnected, you can turn off the power and disconnect the positive wire of the furnace under the dashboard. The negative one is attached over a special thread and pressed down with a special nut. You need to unscrew the nut by touch and fold back the negative wire. By disconnecting the wires, you can remove the motor and install a new fan. The entire structure is assembled in reverse order.

It is important to note that breakdowns associated with the stove also depend on which panel is installed on the VAZ - low or high. Both have their downsides

For example, on a high one the central flap does not open completely. It is she who is responsible for supplying cold and hot air to the car interior. To solve this, you need to adjust the damper. And to get to it you need to disassemble the dashboard.

If we talk about the low panel, this is where the thermostat often breaks. Of course, if it wears out, the oven will not work. It is recommended to change it every two or three years. And if replacement does not solve the problems, it is worth replacing the hoses that connect the stove and radiator.

Photo gallery “Stove removal and repairs”

In the photos provided below you can see in more detail how the furnace repair scheme occurs.

1. Unscrew the motor fixing bolts.

2. Remove the fan.

Removing a faulty device

First you need to determine whether your car has a low or high center panel. If the panel is low, then you are definitely out of luck. To remove it you will have to sweat.

First, turn the front wheels so that they point straight ahead.
Then open the hood, remove the negative terminal from the battery, remove the choke cable from the choke lever, and disconnect the speedometer cable from the gearbox.
Remove the stove faucet handles.
We take out, by pulling towards ourselves, the electric fan switch handle.
Unscrew the 4 screws securing the beard trim and pull it towards you.
We disconnect all the plugs, having previously marked or remembered which connectors they will need to be inserted into later.
Unscrew the 4 screws securing the stove control panel.
Unscrew the 2 screws securing the instrument panel visor and remove it.
We squeeze the clamps of the instrument panel and remove it from the dashboard.
Disconnect the speedometer cable, all plugs and fittings from the dashboard, and remove it.
Pull it towards you and remove the handles for the headlight range control and the dashboard light switch.
Unscrew the nuts securing the headlight range control and the dashboard light switch.
Remove the steering wheel and steering column switches.
Set the ignition key to position “0” and remove the connector with the ignition switch wires.
Unscrew the fastening screws and remove the central panel.

Why does the stove blow cold air?

If the heater radiator on a VAZ-21099 has stopped heating, most likely the coolant circulation in it has been disrupted. This problem is also caused by a number of reasons, let’s look at them:

It is quite possible that the coolant is outdated and, as a result, has lost its properties. Note that its service life is approximately five years. If during this time the antifreeze or antifreeze has never been changed, their structure begins to deteriorate with the formation of sediment, which, settling on the cooling lines, interferes with the normal operation of the system. This sediment also clogs the radiator, pipes and pipes of the heater, causing it to stop functioning normally and giving off heat. Therefore, it is necessary to free the system from the old cooling fluid by completely draining it, and then flush it using a special flushing compound. This liquid is poured into the cooling system, after which the power unit starts. The manufacturer indicates on the packaging how long it takes to use the flushing compound in the system with the engine running before draining it. After the flushing has been drained (it usually comes out of the system quite dirty), new coolant should be added in accordance with the manufacturer's instructions and the heater's performance checked. If after this the stove still does not heat, then its radiator is clogged. If, after cleaning and washing it, performance is still not restored, you will have to buy a new radiator.

One of the most vulnerable elements of the cooling system is the heater valve, which is controlled from inside the car using a special lever on the heater panel. The lever and faucet have a traction connection. It is necessary to check the functionality of the faucet. This is done like this: we move the lever, while controlling the opening and closing of the tap. If the faucet remains motionless or does not open/close completely, then the draft needs to be adjusted. The VAZ-21099 stove heats poorly or does not work at all due to a drop in the antifreeze level in the cooling system. Because of this, air accumulates inside the heater radiator, and it practically does not function (it gives off little heat). To eliminate this, you only need to replenish the level of “cooling” in the system and constantly monitor it. Airiness in the cooling system of the power unit is also a common cause. The carburetor has a heating pipe, which must be disconnected, since it is the highest point of the system, and accordingly, an air lock forms there. The next step is to free the system from air; to do this, remove the cap of the expansion tank and blow it out. Air will begin to escape from the hose that was previously removed from the carburetor, but as soon as coolant flows in instead, the hose must be put back in place. Air in the system has been eliminated. The cause of the malfunction of the VAZ-21099 heater may be a failed thermostat, because of which the power unit does not reach the required temperature (90 degrees). Failure of the pump deprives the cooling system of fluid circulation. At the same time, the engine boils and cold air blows from the air ducts. In this case, it is recommended to replace the pump.

As you can see, there are several reasons for poor operation of the stove in the VAZ-21099, and each of them is a consequence of other malfunctions.

Car owners of “nines” know the operating features of their car’s heating system. When everything is fine in summer, in winter the opposite situation occurs, and cold air enters the cabin. And this is already unpleasant, and also harmful to health. In addition, the side and windshields fog up. Problems with the VAZ-2109 stove must be resolved in advance in order to be fully equipped for winter.

The stable operation of the heating system in a car can be influenced by a huge number of factors. Therefore, before you begin troubleshooting, you need to generally understand how the system works.

Heater replacement or repair

Replacing the heater for VAZ 21099

If there are no signs that the radiator is leaking and the other parts are in order (the electric fan rotates normally, etc.), you need to proceed to repair or replace the stove. Let's start the repair process:

Loosen the clamps;
We disconnect 2 hoses from the tap under the instrument panel (the work is carried out in the cabin);
Now you need to disconnect the hoses going into the engine compartment (loosen the clamps);
We find the nuts securing the stove faucet and unscrew them;
Remove the tap;
The crane rod holder is also dismantled;
It’s time to remove the cover that protects the stove gear shift lever;
Next, the floor covering is removed;
The screw securing the floor lining at the rear of the tunnel is removed;
The floor tunnel lining is dismantled along with the shift;
Now it’s time to dismantle the internal ventilation air duct (disconnect it from the heater);
All wires going to the electric fan are disconnected;
You should also disconnect the wires from the resistor;
Now you need to unscrew the nuts on the right side of the stove;
We remove the stove along with the control panel.

After this, the stove can either be replaced or repaired. Everything will depend on the degree of its malfunction. If, for example, the stove is blowing weakly, then you can adjust the dampers and everything will work out. This video shows how to do this.

Features of the VAZ 2109 stove design

1. Heater casing mounting bracket; 2. Heater control damper; 3. Left heater casing; 4. Leg heating damper rod; 5. Radiator gasket; 6. Radiator; 7. Heater gasket; 8. Electric motor; 9. Fan shrouds; 10. Fan impeller; 11. Heating damper; 12. Heated windshield air duct; 13. Side nozzle air duct; 14. Side nozzle; 15. Central nozzle flap; 16. Blade pusher; 17. Blade axis; 18. Shoulder blade; 19. Lever for shutting off the central nozzle; 20. Windshield heating damper rod; 21. Lever for changing the direction of air flow; 22. Air heating control handle; 23. Windshield air supply handle; 24. Leg air supply handle; 25. Control lever bracket; 26. Bracket for fastening the rod shell; 27. Crane control rod; 28. Heater control damper rod; 29. Foot heating flap; 30. Axes of air heating control levers; 31. Screw clamp; 32. Heater valve; 33. Crane body; 34. Valve lever; 35. Hoses connecting the tap to the heater radiator; 36. Internal ventilation duct; 37. Windows for heating the feet of rear passengers; 38. Heater valve; 39. Driver's foot heating window; 40. Facing the central pillar; 41. Internal cavity of the central pillar; 42. Exhaust ventilation duct; 43. Upholstery of the central pillar; 44. Exhaust ventilation deflector lining; 45. Rubber valve; 46. Deflector housing; 47. Exhaust ventilation deflector; 48. I. Heater; 49.II. Heater operation diagram; 50.III. Heater valve; 51.IV. Interior exhaust ventilation

The stove consists of 2 plastic casings (right and left), which are connected to each other along the perimeter with fastening brackets. A special harness is placed into the grooves of the casings for sealing. The electric fan, which forces air into the passenger compartment, is secured with two screws on top of the heater. The design of the stove is made in such a way that the electric fan can be easily removed from the engine compartment.

An electric motor of type 45.3730 is attached to the fan casings, on the shaft of which an electric fan impeller with three rotation speeds is installed thanks to two resistor spirals. To obtain the required rotation speed of the impeller, an additional resistor is provided, attached to the hole in the stove casing on the left side with a screw.

The radiator for heating the supplied air is installed in the heater casings. It is attached to the right casing with three screws and sealed with a polyurethane foam gasket. It consists of:

two rows of tubes,
cooling plates,
two plastic tanks.

The heater tap, consisting of a housing with two pairs of pipes, is connected to the cooling system by rubber hoses. The cooling system pump circulates fluid through the radiator. On the supply line in the faucet body, a plate faucet valve is installed on the axis, which has a hole that allows coolant to pass through. The valve lever is connected by a rod to the handle lever, which can be used to control air heating. When you turn this lever, the hole in the valve will open the line so that fluid begins to flow into the radiator. Read more about replacing the heater valve here.

The stove is controlled using three handles, the levers of which are mounted on the axes of a plastic bracket attached to the instrument panel with four screws. The heating control handle acts on the valve lever through the rod and on the damper drive lever. When it moves completely to the right, both the valve and the damper are fully opened, and air is supplied by an electric fan through the radiator, where the heated coolant flows.

When the handle is in the middle position, the valve and damper are in intermediate positions; in this case, part of the air passes through the radiator, and part bypasses it. This reliably ensures the required degree of air heating at the moment. If the handle is placed in the extreme left position, the valve and control damper are completely closed, and the air supplied to the cabin is not heated.

The upper left handle, which regulates the air supply to the feet of the driver and passengers, is connected to the damper lever by a rod. When it is moved to the left, the foot warmer flap opens and air from the casings is directed into the windows. On the left and right sides, air is supplied to the feet of the driver and front passenger. Air is supplied to the feet of passengers in the rear seats through the interior ventilation duct.

Heaters old and new

Finally, we note that the VAZ-21099 of different years of production used heaters with certain design features that related to the angle of the radiator and the location of the main damper.

In so-called old-style stoves (on cars before 1998), the radiator was installed almost vertically, and the main damper was located under the heat exchanger. There was a partition between the rear wall of the case and the radiator, which formed a channel that provided air supply down the case.

When the damper was open, the air flow moved through the radiator, where it was heated and supplied to the air ducts. In ventilation mode, the main damper closed the heat exchanger, forming, together with the front wall of the housing, another channel through which the flow went directly to the air ducts.

In the new model stoves (on cars produced since 1998), the radiator position angle was significantly smaller than on old heaters, which is believed to provide a larger contact area of the air flow for heat exchange.

The position of the main damper and its shape also changed (it became arched). It began to be located above the radiator. In the closed position (ventilation mode), the damper ensures air movement along the shortest path to the air ducts. In heating mode, it blocked the cold air supply channel to the air ducts and directed the flow down the housing, from where it went to the heat exchanger.

Heating of the interior of any car is provided by air, which is heated in the heater radiator. The VAZ 2109 heater radiator is connected in parallel to the main radiator, which is part of the cooling system of a car engine.

The heater itself is secured with four nuts in the passenger compartment under the instrument panel to bolts that are welded to the air supply box. The air heated in the heater is directed through an air duct system into the passenger compartment. The air ducts are attached to the instrument panel from below and sealed with gaskets.