VAZ 2109 injector heater does not work • AUTOVIBER.RU

Poor contact

Over time, contacts may oxidize. The check is not difficult; to do this, just move the block with the harnesses. If the fan starts working during the diagnostic process, then the cause has been found. The malfunction can be eliminated by cleaning the problematic contact in the mounting block.

During oxidation, the contact is usually covered with a green or white coating.

Poor contact

During oxidation, the contact is usually covered with a green or white coating.

The fan of the VAZ 2109 2114 stove does not work, one of the reasons

VAZ 21099 heater injector does not work reasons - All about LADA Granta

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.

Secondly, an interturn short circuit of the armature winding may occur in the electric motor. In this case, the “stove” fuse (4th or F7 in block 2114) will light up. Electric motor to be replaced.

Reasons why the heater fan motor only runs at low speed

— Heater speed switch is faulty

The contacts have oxidized or the switch itself has failed.

— The motor armature commutator is dirty or oxidized

It is necessary to remove the electric motor, disassemble and clean the collector.

— The armature shaft jams in the bearings

Extraneous sounds (grinding, squealing, creaking) are possible from the electric motor. The fuse may blow. We are replacing the electric motor.

Reasons why the heater motor operates only at high speed

— Heater speed switch is faulty

— An additional resistor for the heater fan motor has burned out

— The electric motor of the heater fan (“stove”) can be connected to the on-board network either directly (highest speed) or through an additional resistor having two resistance spirals (0.23 Ohm and 0.82 Ohm). If both spirals are included in the chain, the speed is low, if one is 0.23, the speed is average.

More articles on heating and ventilation of the interior of VAZ 2108, 2109. 21099

A stove in the interior of a VAZ-2109 car is necessary in winter. Therefore, if for some reason it stops working

its fan, the car owner begins to seriously worry and takes all actions to solve the problem. This article will discuss the reasons for the failure of the VAZ-2109 stove fan and methods for identifying them.

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Heater fan VAZ 2108/2109

Breakdowns of the stove motor, although not so often, still occur. If this unit fails, the quality of heating is significantly reduced. Depending on the nature of the problem, extraneous noise may appear that distracts the driver's attention. In this situation, repair or replacement of the device is required, for which it must be removed from the car.

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.

We recommend: High engine idle speed: causes, solutions

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.

Why the VAZ-2109 stove fan does not work and how to fix it

A stove in the interior of a VAZ-2109 car is necessary in winter. Therefore, if for some reason it stops working

its fan, the car owner begins to seriously worry and takes all actions to solve the problem.
This article will discuss the reasons for the failure of the VAZ- 2109
and methods for identifying them.

How to disassemble a fan motor

If the stove fan does not work and you do not want to buy a new one, but prefer to deal with the problem yourself, you will need to disassemble the motor itself.

Unscrew the 2 fan mounting screws.
Unhook the fan itself; to do this, disengage its support.
Tear off the foam seal on the right side of the casing.
Remove the fan shroud support.
Using a screwdriver, release the plastic latches of the casing.
Using a screwdriver, pry up the 2 spring latches and unhook them.
Now you can remove the cover from the motor.
Pull out the motor, and the heater motor impeller will also come out with it; do not remove it so that the balancing is not disturbed.
Unscrew both screws that hold the brush holder.
Remove the 2 cage nuts.
Remove the brush holder.
Perform a visual inspection of the collector. If there are scratches or burns, it needs to be cleaned with fine-grained sandpaper. If there is more serious damage that cannot be repaired, replace the motor.
Reassemble everything in reverse order.

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If you already have experience in repairing electric motors, then it will not be difficult for you to cope with this, however, sometimes it is easier to replace a broken motor with a new one than to suffer from repairing the old one and extending its life for a very short time.

Fuses and relays

One of the simplest and most unpleasant faults is a blown fuse. It is simple because anyone can replace a fuse, but it is unpleasant because it can be very difficult to determine why it blew. Typically, fuses blow due to a short circuit in the electrical wiring. On VAZ 2114 cars, the 30-amp fuse F7 is responsible for the heater, on which the cigarette lighter, glove compartment lighting, electric headlight washer motor and rear stack heating also depend. Accordingly, none of this will work

along with the stove.

Reasons why the VAZ-2109 stove fan does not work

Experienced specialists involved in repairing the VAZ-2109 identify several of the most common reasons why the fan of a car heater-stove stops working.

The first reason is a burnt-out fuse element. It is called the most problematic, since it can be difficult to determine that this particular part has failed. To do this, it is necessary to review the entire conductive circuit of the vehicle's heating system. If the problem lies precisely in a damaged fuse, then you should know its marking - “F7” (it corresponds to the specified fuse current strength of 30 A).

The second reason is poor contact in the mounting block. This contact can simply oxidize. To test this assumption, you can simply move the block with the flagella attached to it. If the furnace fan suddenly starts working again after these manipulations, then the reason is precisely this contact. The solution to the problem is obvious - you should clean the oxidized contact in the mounting block.

The third reason is that the relay has flooded in the ignition system. This reason is easy to find out. To do this, you need to pay attention to the moment at which the VAZ-2109 heating device starts working. If it turns on after the warm-up phase of the vehicle has already completed, then the ignition relay is filled with oil. In this case, experts advise replacing the failed relay, which is located on the VAZ- 2109

under the dashboard.

The fourth reason is that the fan does not start operating immediately (like the car heater itself), but at third speed. It turns out that the described reason has a direct connection with the additional resistor. So, at the first two speeds, the fan is powered by electric current using this additional resistor. When switching to the third speed mode, electric current begins to flow directly to the fan without any additional devices. If you replace the damaged additional resistor, the car heater fan will begin to function at the first speed mode.

Also, experts attribute the faulty state of the switch of this system to the reasons why the fan included in the design of the heating system of a vehicle may not work. The switch described is located under the center console. To diagnose it, you need to perform a number of simple operations:

dismantle the center console;
start the car;
We take a twelve-volt light bulb (for example, a marker light bulb), which will serve as a kind of tester if we solder wires to it - “minus” and “plus”;
“minus” wire – we close it to the body;
“plus” wire – touch the 1st, 2nd and 3rd contacts of the additional resistor.

Let's diagnose the reaction of the light bulb tester:

the tester is on - the switch is in working condition;
the tester does not light up - the switch does not work.

In the second case, we connect the wire of the light bulb tester to the “plus” of the switch and again diagnose its reaction:

the tester is on - there is no break in the current-carrying circuit, the fuse is not damaged;
the tester does not light up - there is a break somewhere in the current-carrying circuit, but the fuse is in working order.

Having analyzed the problem situation and the reasons that led to its occurrence, they should be solved by replacing the failed part.

Also, the malfunction may be hidden in non-functioning parts of the fan itself. Most often, its electric motor—the heart of this device—fails. This reason is diagnosed when all the previous ones turned out to be unsuitable. If we consider in more detail the types of fan motor malfunctions, we can highlight among them:

THE VAZ 2109,2115,2114,2113 OVEN FAN DOES NOT WORK

This part burned out.
The electric motor has poor contact with the vehicle's ground.
Sticking is observed in the brushes of the electric motor of the car heater fan.

The critical reason for the failure of the VAZ-2109 heating system fan is the confirmed fact that its electric motor burned out. In this case, the entire device will have to be replaced at once, and not a specific part.

Fan doesn't work

The most common reason, it happens, is that the fan does not work, it simply does not blow, and, accordingly, warm air does not flow well into the cabin, or rather does not flow at all. Of course, the heater radiator will heat up, but for heating the entire cabin, this is extremely insufficient.

The fan or the electronics that control it need to be replaced. Or look at the fuse, often it simply blows and needs to be replaced.

Stove motor failure

The heater motor may burn out over time, but before you start replacing it, check all fuses, the ignition relay, and the heater temperature switch for integrity. If all this is in order, the problem is with the motor. It must be replaced by first disassembling and removing the dashboard. We described in detail how to do this above. You also need to remove antifreeze or antifreeze from the system and turn off the heater valve.

After removing all the pipes, pull out the old stove and install a new one in its place. After checking the performance of the heater, you can fill the cooling system with the previously drained liquid.

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I often have problems with my car's heater. Stove

It heats very poorly and produces light warm air. I think there are malfunctions in the cooling system, as they said. What about fixing cars? It is clear that you are a master of your craft.

I have a stove

It heats up, but the air is simply lost in the air ducts, hot air comes out of the engine, but when it comes out it doesn’t blow at all. Although the whole torpedo is hot and only the glass blowing works. I assembled everything correctly, what could be the problem.

I have a problem with the heater in my car, I tried all the above methods, but nothing helps, it didn’t work and still doesn’t work. Either my hands are not from there, or... I don’t know what else it could be. In general, tell me, maybe it would be easier to install a new stove?

Fan replacement process

Of course, you should prepare for any task; only in these cases can you count on an optimal result. It is imprudent to purchase any spare parts or the new motor itself in advance, since no one knows what the problem is, why the heater motor on your VAZ-2108 howled so much. However, to carry out diagnostics it must first be removed. For these specific actions, you will need to have a Phillips screwdriver, a 10mm socket and a ratchet handle on hand. We will work both from the engine compartment and from the interior.

Algorithm of actions

First, open the hood and unscrew the five bolts that securely secure the plastic trim. We remove it and put it aside so that it does not interfere with us during all subsequent actions. Now remove the rubber seal on the hood as it prevents the fan guard from being removed. As soon as you remove this casing, you will immediately be able to find the motor itself. It is easy to see that it is fastened with two bolts. Arm yourself with a pre-prepared screwdriver and unscrew these bolts.

After this, we suggest that you move into the car interior and prepare to continue working in an uncomfortable position. It is very important to disconnect the power leads. Under the instrument panel you will find a positive wire plug, unplug it. The next step should be to disconnect the negative wire. However, it is additionally secured with a nut located in an inaccessible place. For this reason, try to initially feel it, and then, after getting used to it, unscrew it using a socket and ratchet. Once you disconnect the wires, push them towards the motor itself. Leave the interior and go to the engine compartment again. Grasp the engine with both hands and carefully turn it from side to side to find the optimal location to remove it.

After you manage to remove the heater motor, inspect it to make sure it is intact and free of mechanical damage. If your diagnostics show that the stove motor can no longer be restored, go to the store and buy a new one. You really don’t want to part with some money, but you still have no other choice. It is impossible to travel without a heater in winter, not only because there is no comfort, but also because such trips are unsafe.

Some craftsmen are making efforts to remake a failed motor. If the bushings on the VAZ or UAZ heater motor “fly”, many decide to insert bearings instead. Indeed, it is possible to revive the fan’s operation, but especially not to get rid of the noise. Only you can decide for yourself whether to purchase a new one or restore the old one; we are not your guide in this matter. In any case, you will also have to perform steps aimed at installing a new or restored motor back into the engine compartment. Don't worry about this because you will have to do the same thing, just in reverse order.

Why “the stove doesn’t heat up” on a VAZ 2109

Let's start with those that are fairly easy to identify. If the electric fan fails, the amount of air flow passing through the heater core will depend only on the speed of the vehicle. If the car is stationary or moving at low speed, there will be very little warm air in the cabin. This malfunction is easily determined. We turn on the fan in one of the operating modes, but we do not hear the noise of the operating fan.

The lack of warm air for blowing the windshield and side windows will be felt if the air ducts are not sealed. To check, warm up the engine to operating temperature, open the hood, touch with your hand the tube supplying coolant to the heater radiator, and then touch the tube discharging it. If you feel a temperature difference, it means that the heater is working, and the warm air partially goes into the gaps of the air ducts.

One of the bottlenecks of the VAZ heating system is2109

, is the heater valve. It is a non-separable plastic case, inside of which there is a thin plate on the axis. So, when you turn it, it will block the flow of coolant. In summer, the tap is closed, and this plate can stick to the body. Then it will simply be impossible to open it.

Another reason for the incomplete opening of this damper may be the pulling of the drive cable. When the valve damper control lever is moved to the on position, due to the longer cable, the damper does not open completely, which reduces the flow of hot liquid into the heater radiator.

The valve of the faucet is rigidly fixed to the turning axis, but there are cases when the axis rotates in this thin plate and then it will remain in the position it was before the axis was turned. If at that moment it blocked the inlet hole, then it will no longer be possible to open it, which means that the hot coolant will not flow into the heater radiator.

A damper is also installed in front of the heater radiator. When open, it forces air flow through the radiator core. In the closed position, air flows into the cabin, bypassing the radiator. If this damper in the open position is not pressed against the heater body, then cold air enters through the resulting gap, which will reduce the temperature of the entire flow. This malfunction occurs again due to the pulling of the drive cable.

Before you look for why the stove

on a VAZ 2109, you need to check the engine cooling system. Is the coolant warming up to an operating temperature of 90 degrees, is the coolant level sufficient on a cold engine, and are there any air pockets anywhere? Having made sure that the cooling system is in normal operating condition, only then do we move on to troubleshooting the heater, paying special attention to the heater valve.

Heating system radiator

A radiator is built into the stove body to heat the air flows, which then blow into the cabin. Using three screws, this element of the system is screwed to the right casing and sealed with a polyurethane foam gasket.

The radiator design is a combination of:

2 rows of tubes.
2 rows of cooling plates.
2 plastic tanks.

It has two pairs of pipes, it is connected to the cooling system by rubber pipes, where coolant circulation is ensured using a pump. In the valve casing, on the axis of the supply line, there is a plate valve, which has a hole; it allows the coolant to pass through. The valve lever is connected by a rod to the handle lever, which also controls the process of heating the air flow. If you turn this lever, the hole in the valve will open the line for coolant to enter the radiator.

To ensure uniform heating of the car interior, the stove has two central nozzles, as well as left and right, to which air ducts are connected.

What is a stove fan

A car heater, which is popularly called a stove, is designed to perform a simple and at the same time important function - heating the interior. In addition, the device helps eliminate fogging of windows in cold and damp weather. During normal operation of the heating system, the temperature in the interior of the “nine” should be maintained at +20 ˚С with the same indicators outside, but only with a minus sign. In the legs, with maximum heating mode, the value should be maintained at +25 ˚С. One of the important components of the stove, in addition to the radiator, is the fan. The purpose of this device, its malfunctions and repairs should be considered in more detail.

Purpose of the device

The purpose of the motor is to increase the efficiency of the heating system and air circulation in the car. Its operation is based on air intake from outside and its subsequent supply into the cabin through the radiator. As a result of the air flow passing through the heat exchanger, the air enters the cabin already warmed up.

Heater operation diagram: a - VAZ 2108; b - VAZ -2108–01: 1- fan impeller; 2 — air duct for heating the windshield; 3 — windshield heating flap; 4 — damper for heating the driver’s feet; 5 — central nozzle flap; 6 - central nozzle; 7- radiator; 8 — heater control damper; 9 — driver’s foot heating window; 10 - internal ventilation duct

Where is the motor located on the VAZ 2108/09

The heater motor on the VAZ 2108/09 is installed in a niche in the engine compartment in front of the windshield, which is radically different from the design of the heater of classic Zhiguli cars, which have a fan installed in the cabin. The unit is an electric motor with an impeller mounted on it, through which air is pumped into the cabin.

The heater motor on the VAZ 2108/09 is installed in a niche in the engine compartment in front of the windshield

Electrical component of the stove

Below is an electrical diagram for turning on the fan. For it to work, you need a temperature sensor, which is located in the radiator. When the coolant reaches a certain temperature, the sensor gives a signal and the fan turns on automatically.

Mounting block.
Ignition.
Additional resistance (resistor).
Motor.
Button that controls the motor.

A – to the terminal with a plus sign “30” of the generator.

Some cars still have an old mounting block installed, in which case the fan is turned on via a relay.

Exhaust ventilation

The car is equipped with exhaust ventilation, which circulates air from the interior to the street. It is located behind the body openings for the side windows.

Air also passes out through the deflectors when the car moves. The ventilation process is carried out due to the vacuum that occurs at the deflectors during movement. Air is sucked out from the rear of the cabin under the deflector trim; for this purpose, the rubber valves are pressed out and the air flow goes out through the deflector hole to the street.

Rubber valves are needed to prevent outside air from entering the car interior.

Internal structure and principle of operation

The heating system installed on the VAZ-2109 has its own differences and features compared to other cars in the AvtoVAZ line.

The heater consists of a pair of plastic casings (on the right and on the left), which are connected to each other along the entire perimeter with clamping brackets. A special flagellum is placed in the grooves of the casings to seal it well. The fan supplies air flow to the interior of the machine. Stove

The VAZ-2109 is designed so that the fan can be easily removed independently from the engine compartment.

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An electric motor of type 45.37230 is attached to the casing, and a fan is located on its shaft. To obtain its desired speed, Renault provided additional resistance. It was attached to the left side of the hole in the heater casing using a screw.

Heating system elements

The stove diagram clearly shows the location of its main functional elements. It should be noted that the design of the stove on VAZ-2108 models, 2109

and 21099 are the same. Many car owners know that the heater in these models is not fully developed. As a result, the interior is not heated properly, so a decision is made to modify the stove with your own hands. Just in this case, it is important to know the design of the heater so as not to confuse anything.

The design of the stove of the VAZ-2109 car, whether it is a high panel or a low one, is absolutely identical. Therefore, the information presented will be useful to owners of this model with any instrument console.

Knowing the main points and what is located where, you can already try to independently deal with the problems that arise and fix the malfunctions that appear, while saving money and time on trips to the service station.

Troubleshooting or why the heater fan stopped working

If faults appear in the electrical circuits, the fan simply will not turn on. This can be determined by the value of the coolant temperature; the index arrow will move to the red zone of the scale. To troubleshoot in this case, reduce the load on the engine to idle speed and turn on the interior heater. Then open the tap to supply coolant to the heater radiator. Start coasting until you come to a complete stop.

Always start looking for the cause of a malfunction with the electric motor switch. To do this, open the hood and disconnect the sensor terminal. To continue testing, you will need a piece of wire with which you need to short-circuit the 2 wires that go to the terminal. In this case, insulate the jumper so that it does not come into contact with the ground. Start the car, if there are no other problems, the fan will start working. But it will work constantly until you turn off the car.

If after your actions the fan does not work, then open the cover of the mounting block and check the fuses on it to see if they are working. If the fuses are good, but the fan still does not work, then the problem lies in the electric motor.

To test the motor you will need 2 insulated wires to connect the motor terminals directly to the battery. If the fan starts working

, check where the air flow is directed, if it goes under the hood, then everything is correct, but if not, then you need to change the polarity of the wires that you connected to the battery.

As can be seen from the above, the main reasons why the fan does not turn on is a malfunction of the relay or system wiring.

What aspects to pay attention to

In what cases does the heating system of a car interior fail? What aspects should you pay special attention to?

Insufficient opening of the heating tap

The real problem in most cases occurs in VAZ cars with front-wheel drive. To check, it is necessary to compare the temperature conditions of the two pipes, namely the inlet and outlet. If there is a difference in temperature, the valve is not open enough. In order to carry out the adjustment, it is necessary to tighten the cable designed to control the valve to the maximum open state. In this case, you should carefully monitor the condition of the entire structure, since the valve is a weak point and sooner or later its switching will no longer be possible. A drastic solution may be to remove the valve from the system or install a ball valve, but in both cases there will be a problem with the easy adjustment of the fluid used to cool the interior.

Insufficient tightness of air ducts

The air that is pumped by the fan of the stove used can partially escape into the cracks. At the same time, the temperature in the car interior decreases. It is imperative to seal the connections of the entire structure, since only in this case will the optimal air temperature be maintained.

Air pockets in the radiator

Another reason why the heating regulator cannot work at full capacity is the presence of air pockets. A manifestation of the problem may be cold air coming from the deflectors. In this case, the vehicle must be placed on a hill with its front wheels, then the heater tap must be fully opened and gassed.

How to replace the heater motor

Very often, when a creaking noise appears when the stove is turned on, it indicates a malfunction of its motor or its imminent failure. In this case, you will need to replace the heater motor. There are also cases when you need to replace a heater fan; the operating principle for replacing a motor and a fan is very similar.

Crosshead screwdriver.
Ratchet with a head 10 mm in diameter.
Flat screwdriver.

Replacing a VAZ stove fan is not a difficult job, the main thing is to clearly know what exactly you will do and in what order.

Remove the plastic cover of the heating system; it is located in the engine compartment of the car and is held on by five bolts.
Slide the heater motor protective cover; to do this you will need to remove the rubber band that acts as a hood seal.
When removing the fan with the motor, unscrew the 2 mounting bolts that secure them.
Then return to the cabin and find the positive wire plug under the steering wheel and unhook it.
The next step is to unhook the negative wire; to do this, unscrew the fixing nut using a ratchet.
Return to the engine compartment and remove the heater motor.
Replace faulty parts.
Reassemble everything in reverse order.

Try not to mess up anything with the connections of the electrical circuit, otherwise you will have to disassemble everything again.

It should be noted that any VAZ owner can handle the job.2109

, and - about the cost of a new motor complete with a fan.

VAZ 2109 - how to remove the interior heater fan

The main reason for removing the interior heater fan on a VAZ 2109 car is its failure for the purpose of subsequent repair or complete replacement. The fan is located in the engine compartment in the compartment between the engine and the passenger compartment and is placed in a plastic case. To carry out repair work, prepare a standard set of tools, and then perform the following sequence of actions:

Open the hood and disconnect the negative terminal from the battery.
Next, we move into the car interior and disconnect the power wire from the electric motor, disconnecting the block from the wires.
Immediately unscrew the engine mounting nut and remove the ground wire from the stud.

Next, we need to remove the electric motor casing, located in the compartment between the engine and the passenger compartment. Use a Phillips screwdriver to unscrew two screws securing it, and then remove it.

Unscrew the two screws securing the electric motor to the car body. After that, in order for us to remove it without problems, we need to unscrew the screws and remove the air intake grilles.

Now we remove the electric motor, to do this we slightly lift it, then turn it 90 degrees and pull it out of the body compartment.

At this point, the repair work to remove the interior heater fan of the VAZ 2109 is completed. Carry out the necessary repairs. Perform installation and subsequent assembly in reverse order.

Related materials:

How to disassemble a fan motor

If the stove fan does not work and you do not want to buy a new one, but prefer to deal with the problem yourself, you will need to disassemble the motor itself.

Unscrew the 2 fan mounting screws.
Unhook the fan itself; to do this, disengage its support.
Tear off the foam seal on the right side of the casing.
Remove the fan shroud support.
Using a screwdriver, release the plastic latches of the casing.
Using a screwdriver, pry up the 2 spring latches and unhook them.
Now you can remove the cover from the motor.
Pull out the motor, and the heater motor impeller will also come out with it; do not remove it so that the balancing is not disturbed.
Unscrew both screws that hold the brush holder.
Remove the 2 cage nuts.
Remove the brush holder.
Perform a visual inspection of the collector. If there are scratches or burns, it needs to be cleaned with fine-grained sandpaper. If there is more serious damage that cannot be repaired, replace the motor.
Reassemble everything in reverse order.

Sources:

https://avtoohaker.ru/snyatie-i-zamena/ne-rabotaet-pechka-v-vaz-2109-chto-delat-esli-ona-perestala-rabotat-i-ne-greet-prichiny-remonta https:/ /helping-auto.ru/vaz/2109/pochemu-ne-rabotaet-pechka-na-vaz-2109/ https://remam.ru/vozdsys/shema-i-ustrojsTVo-pechki-vaz-2109.html https: //remam.ru/vozdsys/ne-rabotaet-ventilyator-pechki-vaz-2109.html