Heater fan VAZ 2108, 2109: why it doesn’t work, where it is and how to remove it

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.

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.

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.

1. 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.
2. Slide the heater motor protective cover; to do this you will need to remove the rubber band that acts as a hood seal.
3. When removing the fan with the motor, unscrew the 2 mounting bolts that secure them.
4. Then return to the cabin and find the positive wire plug under the steering wheel and unhook it.
5. The next step is to unhook the negative wire; to do this, unscrew the fixing nut using a ratchet.
6. Return to the engine compartment and remove the heater motor.
7. Replace faulty parts.
8. 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 owner of a VAZ-2109 can handle the job, and the price is 1,500 rubles—about the cost of a new motor complete with a fan.

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:

1. 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.
2. Fully tighten the tap, and place a rag under possible coolant leaks.
3. 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.
4. Repeat similar steps with the upper hose.
5. 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.

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1. Open the hood and disconnect the negative terminal of the battery.
2. Behind the engine shield, unscrew the four screws securing the fan casing and remove it. Phillips head screws.

After removing the casing, remove the two screws that hold the fan housing in place.

Using a slotted screwdriver, open the latches and separate the plastic fan housing into two halves.

Disconnect the heater motor power supply terminal (it is located above the gas pedal).

Unscrew the nut by ten and remove the ground terminal of the heater motor (the terminal is located above the gas pedal).

After removing the wires, remove the fan along with the motor.

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.

1. Unscrew the 2 fan mounting screws.
2. Unhook the fan itself; to do this, disengage its support.
3. Tear off the foam seal on the right side of the casing.
4. Remove the fan shroud support.
5. Using a screwdriver, release the plastic latches of the casing.
6. Using a screwdriver, pry up the 2 spring latches and unhook them.
7. Now you can remove the cover from the motor.
8. 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.
9. Unscrew both screws that hold the brush holder.
10. Remove the 2 cage nuts.
11. Remove the brush holder.
12. 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.
13. Reassemble everything in reverse order.

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.

Radiator malfunction

A common reason why the heater on a VAZ 21099 does not work often lies in the malfunction of the heater radiator itself and, most likely, it needs to be replaced. The radiator is located at the feet of the front seat passenger.

The replacement for cars with low and high panels is almost the same, but the owner of a car with a high panel will need to remove the passenger seat. After dismantling the seat (if necessary, as described above), you need to unscrew the screws holding the panel itself. Pull the panel a little to create a gap into which the spacer is placed. The faucet is screwed in completely; a rag should be placed in the areas where the coolant leaks.

Next, we move to the engine compartment, where we unscrew the caps on the radiator device. The work carried out further must be done as quickly as possible to prevent coolant leakage. The lines come out from the radiator device - they need to be closed with plugs: first, push your hand through the allocated central panel and unfasten the lower hose and quickly plug the hole that appears with a plug and repeat the same procedure with the upper line.

After all the liquid has been drained, the old radiator is removed and a new device is installed.

Functions of the VAZ-2109 stove fan

The VAZ-2109 car heater is designed to heat the vehicle interior. It also helps get rid of glass fogging from inside the car. Its heating power is designed to ensure that at 25 degrees below zero, an optimal thermal regime will be maintained inside the car - from 16 degrees Celsius.

One of the main elements of a car heater is a fan. It is needed in order to drive air from the external environment, which enters the heating device through the radiator. Cold air undergoes a warm-up procedure and enters the car interior already warm.

The stove in a car may stop performing its direct functions if the fan included in its design stops working.

Therefore, experts recommend that the vehicle owner understand the reasons for its breakdown.

Bottom line

After all the parts are in place, it is necessary to check. Start the engine and let it warm up to operating temperature. In order to heat the coolant faster, simply drive the car, giving the VAZ 2108 engine high speeds.

Warm up the engine to operating temperature

When the temperature sensor shows a sufficient level, turn on the stove. If you feel warmth, it means the job was done correctly. All that remains is to check the operating modes (fast and slow). If everything is functioning, then you can praise yourself because you did everything without errors, and you can enjoy a comfortable trip, regardless of weather conditions.

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:

1. This part burned out.
2. The electric motor has poor contact with the vehicle's ground.
3. 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.

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:

1. Insufficient amount of coolant in the system.
2. Clogging of radiator tubes.
3. 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:

1. Possible overheating due to fuse failure.
2. 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.

How to replace a faulty VAZ-2109 stove fan

Replacing a non-working heating system fan involves several steps:

• dismantling the stove lining, which is located under the hood;
• opening the protective casing of the engine of a car heater;
• unscrewing the mounting bolts that serve as fan clamps;
• removing the faulty part and replacing it with a working one;
• assembly in reverse order.

As you can see, the described replacement is quite easy to carry out in a garage yourself, but if difficulties arise, you can always contact a car service for help.

Heater fan (interior heater) does not work

In this article we will look at the main points and reasons why the stove (stove fan) does not turn on.

How can you tell if the heater fan is not turning on? – very simple: with the car running, turn on the heater at 1-2-3 speeds. If no additional “noise” appears, then the fan does not turn on. I would like to note right away that if the fan does not turn on, for example, at speed 1-2, but does turn on at speed 3, then the problem is in the additional resistor or in the heater operating intensity switch.

Let's figure out how the stove turns on in theory. Pay attention to the picture:

• 44 – fan motor;
• 45 - additional resistor (used to regulate the speed of the electric motor, number 44);
• 46- position switch.

Why the stove motor does not work, the main reasons

1. The fuse has blown.

The simplest and at the same time the most unpleasant malfunction, because replacing the fuse is very simple, and at the same time, we do not know the reason why it blew. Let me remind you that if a fuse blows, it means there is a short circuit somewhere (short circuit). In this case, you need to go through the entire fuse circuit and look for the source of the short circuit.

What fuse goes to the stove?

A fuse F7 with a current of 30A is attached to the stove. This fuse is also responsible for the cigarette lighter, headlight washer motor, glove compartment light, and heated rear window. So, if a fuse blows, then in addition to the heater fan, the above-mentioned electrical elements of the car will stop working.

2. Poor contact in the mounting block.

Poor or oxidized contact in the mounting block is also a common disease. In this case, you need to move the block of flagella going to the mounting block.

3. The ignition relay is stuck.

If your stove is malfunctioning, for example, it only turns on when warm, then the problem is in the ignition relay.

It’s surprising, of course, how the ignition relay affects the operation of the stove, but the fact remains a fact. The relay needs to be replaced. By the way, it is located under the instrument panel in the center console.

4. The stove turns on only in position 3 of the switch.

If you encounter this situation, then you need to replace the additional resistor. The fact is that in positions 1 and 2 of the heater switch, current flows to the fan through an additional resistor, and in position 3 - directly to the fan. Therefore, the conclusion follows that the additional resistor is faulty. Additional heater resistor. Inspection, repair, replacement.

5. The stove (heater) switch does not work.

To check the position switch (numbered 46 in the figure), we need a regular 12-volt marker light bulb with two soldered wires. We remove the center console of the instrument panel in order to gain access to the heater switch (How to remove the instrument panel?), then do the following: turn on the ignition; We close the negative wire of the light bulb to body ground, and connect the other to outputs 1-2-3 to an additional resistor (gray, white and red wire in the figure). If the light is on, then the switch is working; if it is not on, then we connect the lamp to the positive wire of the position switch (in the figure it is the blue-yellow wire). If the lamp does not light, then there is a break in the circuit somewhere or the fuse has blown out.

6. The heater (heater fan) motor does not work.

If the heater switch works, there is voltage, but the fan does not turn on, then either it is burnt out, or there is poor contact of the fan ground (the ground is located under the heater mounting nut), or the motor brushes are stuck. The VAZ stove does not work, what should I do?

Stove design

Stove structure: 1 – elastic bushing; 2 – spring nut; 3 – left fan casing; 4 – electric motor; 5 – impeller; 6 – right fan casing; 7 – windshield heating flap; 8 – damper for the foot airflow channel; 9 – heater control damper; 10 – right heater casing; 11 – bracket for fastening the heater casings; 12 – gasket; 13 – radiator; 14 – clamp; 15 – supply hose; 16 – outlet hose; 17 – tap; 18 – left heater casing; 19 – sealing cover; 20 – resistor; 21 – support for the heater control damper axis.

Structurally, the VAZ 2109 stove consists of several parts:

1. The outer casing is made of several complex configurations of plastic parts that fit tightly together and have seals.

Air ducts are large-diameter corrugated tubes through which air is delivered to the nozzles in the cabin (at the windshield, on the driver and passenger sides). The amount of flow is regulated by valves.

2. Control valves - they are located both inside the dashboard and on it. The former are adjusted through traction cables, and the latter directly manually.
3. The radiator is made of aluminum and plastic. Tubes and plates are metal. Plastic - storage tank.
4. Fan - runs on electricity and is powered from the on-board network (12 V)
5. Rubber tubes - connect the expansion tank, radiator, pump. Coolant is supplied and discharged through them.
6. The pump is also electric, pumps antifreeze and provides more intense heat exchange.
7. Thermal sensor - installed inside the radiator and controls the operation of the pump and fan.
8. The tap is controlled by a special lever and allows you to completely shut off the coolant flow in the system.
9. Control levers and rod system - displayed on the dashboard and transmit influence to internal dampers and switches
10. The vernier for turning on and adjusting the fan speed is also located on the front panel next to the levers.
11. Electrical unit - power wiring and loading resistors.

VAZ 2109 heater fan does not work

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VAZ 2109 heater fan does not work April 11, 2016 at 10:08

Many owners of domestic VAZ 2109 cars are faced with such a problem as a non-working stove. During the cold period, this breakdown causes a lot of inconvenience. Often the reason that the stove on a VAZ 2109 does not heat is a faulty fan. It is very simple to make sure that the heater fan is not working on a VAZ 2109: just turn the heater switch to any speed and listen to see if a characteristic noise appears. It happens that the fan turns on only at third speed. In this case, the cause is the burnout of the additional resistor or the breakdown of the switch itself. To determine why the stove fan does not work, it is important to understand what parts this spare part consists of. So, on the VAZ 2109 the fan includes a motor, an additional resistor responsible for adjusting the speed of the electric motor, and a temperature switch.

Fan failure

The heater fan on the VAZ 21099 does not work. First you need to check its operation. The ignition is turned on in the car and the fan itself turns on. Using a switch, which usually has three speeds, we check the operation of the fan at each speed. The hum of the fan should be audible; if the fan cannot be heard in the cabin and under the hood, then it needs to be removed and checked by an electrician.

When checking, it may be discovered that the fan motor itself is running, which means there is a fault in the electrical wiring. We need to find out why the signal from the switch does not reach the fan motor. If you hear a loud knocking or grinding noise from the heater fan motor, the fuse may have blown. The heating system engine needs to be replaced.

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