VAZ 21099 heater does not work when the engine is on

The VAZ 2109 injector stove stopped working

With the weather getting colder, driving an unheated car is no fun. There may be several reasons for a heater malfunction. From this article you will learn what to do if the fan of the VAZ-2109 stove does not work and how to get to it to replace 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.

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.

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.

Tips for motorists

Indeed, the interior heater of the VAZ-2109 car often presents the owners of these vehicles with surprises associated with failures in operation during the cold season. Perhaps it was already faulty in the summer, but who turns it on in the summer? There may be several reasons for the unsatisfactory operation of the stove; in principle, they are now well known.

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

Let's start with those that are fairly easy to identify . 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.

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.

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.

Connection diagram for the electric motor of the interior heater fan - heater of VAZ 2108, 2109, 21099 cars with a high panel

— 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

Notes and additions

— 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.

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.

The stove VAZ-2108 does not work

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Messages 7

1 Topic by nikel 2010-10-20 11:37:42

• nikel
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Topic: VAZ-2108 stove does not work

Good afternoon ! Help me please ! My stove doesn't work. So, in order. The stove just stopped working. It worked only after the car jumped on bumps, and even then until the first shutdown. Then it wouldn't turn on again. Sometimes it happened like this: you start the car, turn it on - it doesn’t work. You turn it off (I don’t turn off the stove), start it up and it starts working, but only in the 3rd position and until the first turn off, then it doesn’t turn on again. I replaced the switch - it didn't help. One friend advised me to kick the gas pedal - I kicked it and it started working. I kicked it 2-3 times - it helped, but now it doesn’t. Does not work. I found out about an additional resistor. I looked. One of the 3 wires was completely torn off, the terminal on the other 2 was burnt. I took it apart and replaced the terminals and resistor. Still doesn't work. A new electric motor for the stove costs 700 rubles. I don’t want to just throw away money - what if it’s not about him! I want to try to disconnect the old one and test it on the battery. Please advise, otherwise it’s very cold now and you need to carry a small child. Thanks in advance.

Sincerely ! Nikolai.

2 Reply from SokolOFF 2010-10-20 12:24:42 (2010-10-20 12:33:19 edited by SokolOFF)

• SokolOFF
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Re: VAZ-2108 stove does not work

Greetings! Well, firstly, it wouldn’t hurt to use the search; a similar topic already exists here.

As for the problem - firstly, it’s worth looking at whether +12V is coming to the stove at all (this is a yellow wire with a blue stripe on the switch); if everything is OK here, we move on. when you turn on each of the three positions on one of the contacts of the block going to the additional. The resistor should appear +12v.

It’s also worth looking - just above this resistor there is a block of the stove motor itself. While they were kicking the stove they could have hit...

Yes, the fuse is also worth looking at... F7, I think.

3 Reply from nikel 2010-10-21 05:27:41

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Re: VAZ-2108 stove does not work

Thank you very much. Especially about the fuse. And I also wanted to ask how to measure the voltage? The positive probe from the multimeter goes to the positive wire, and where does the negative probe go? To the ground of the fan electric motor or to any place in the body?

4 Reply from salavinka 2010-10-21 05:37:44

• salavinka
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Re: VAZ-2108 stove does not work

Thank you very much. Especially about the fuse. And I also wanted to ask how to measure the voltage? The positive probe from the multimeter goes to the positive wire, and where does the negative probe go? To the ground of the fan electric motor or to any place in the body?

Any place on the body can be

The VAZ 2114 heater fan does not work for reasons.

Hello. If you start the car in severe frost or on a hot summer day, and the heater fan on the VAZ 2114 stops working and does not blow, do not be upset, as this problem can be quickly solved by reading this article. In order to understand the reasons why the stove fan may not work, let's first look at the electrical diagram for connecting the stove motor.

Heater fan diagram for VAZ 2114, 2115, 2113.

And so, here is a list of all components of the scheme:

1. Mounting block (aka fuse block).
2. Egnition lock.
3. Ignition switch relief relay.
4. Heater fan speed switch.
5. Additional resistors.
6. Stove motor.
7. Rear window heating switch with warning lamp.
8. Rear window heating element.

The scheme works as follows. When you turn the key in the ignition switch (2), its unloading relay (3) is turned on. The unloading relay supplies power to fuse f7 in the mounting block (1). After the fuse, power goes to the rear window heating switch (7) and the fan speed switch (4), which distributes which of the resistors (5) the power will go to next. Output 1 from the switch (4) corresponds to the slowest blowing speed, and output 3 goes directly to the heater motor (6), i.e. highest blowing speed.

Reasons why the VAZ 2114, 2115, 2113 heater motor does not work.

The reasons why a fresh flow of cold air in summer or a hot stream in winter does not come from the air ducts of your VAZ 2113, 2114, 2115 can be of two types:

• mechanical
• electric

Let's look at them in more detail.

Mechanical reasons why the VAZ 2114, 2115, 2113 heater fan does not work.

First of all, mechanical reasons include clogging of the air duct.

As you can see in the photo, leaves, branches and other debris get under the casing and clog the air duct of the heater motor. Debris can get into the section with the blades itself and jam the stove fan. Usually before this, a whistle or grinding noise is heard from under the soot space.

Mechanical reasons for the inoperability of the stove motor include jamming of the blades due to improper installation of the stove fan housing. When removing the stove motor, the latches securing the two parts of the housing are often damaged. And if these parts are not firmly fixed to each other, then there will be a gap between them and the air flow that should go into the cabin will fall into this gap. Also, parts of the housing may generally jam the motor blades, then it will not spin at all.

Problems with the heater fan from the electrical part.

In this section, we will consider the circuit to the VAZ heater fan by components.

Fuse.

Let's follow the scheme given at the beginning of the post. If your heater fan does not work together with the heated rear window, then the problem is 100% in the fuse. Check fuse f7 in the mounting block , if it is ok, then use a multimeter to see if the plus is coming to it from the ignition switch unloading relay. To do this, with the ignition on, place one multimeter probe on the fuse and the other on the car body. If everything is in order, look at the circuit from the fuse to the speed switch and the heating switch.

Heater fan speed switch.

We figured out the fuse - let's move on. And then we have the stove motor speed switch . To check it, remove the connector from it. The connector has three inputs nearby and one is located, as if separately from them. We connect any of these three inputs with a wire to the one that stands separately. If the motor starts working, then the speed switch is to blame; if not, we move on.

Additional resistors.

If the fan works, but only at the third (fastest) speed, then additional resistors . In the third mode, power is supplied directly to the fan, bypassing additional resistors, so it does not work in other modes.

How can you improve the heating system of a VAZ?

How to interact with the VAZ heater? In many situations, modifications to the heating system are recommended.

Many motorists note that in winter the stove is able to work at its full potential. At the same time, hot air goes into the car interior, but the windows continue to remain unblown. As a result, any decrease in temperature results in the windshield encountering a significant flow of cold air. In this situation, there is a serious risk of ice forming on the windshield with a further deterioration in the driver’s visibility. This problem is most often explained by the damper, and to improve the operation of the heating equipment, it is recommended to tighten the stove cable. To do this, use wire cutters, a Phillips screwdriver, pliers, and an awl. What is the best course of action to achieve the best results?

1. First you need to remove the left screen from the dashboard. It is important to note that the required plate is attached with three screws, and it is always located on the right foot of the driver. Before this, the stove should be moved to the right side all the way and the metal latch should be removed.
2. The next step involves removing the protective part from the cable. To do this, the plastic protective part must be carefully moved to the side.
3. Initially, one turn is cut, for which it is recommended to use wire cutters. It is recommended to clamp the remaining turns in a horizontal position using pliers and tighten tightly. At the same time, they must be aligned all together.
4. It is best to return the end of the cable to its original place.
5. After the measures have been taken, you need to check the functionality of the stove. In most cases, the problem is eliminated, since the tension element has a short stroke.
6. The final stage is assembling the latch, plate and installing the dashboard in its classic place.

In fact, operating the stove on a VAZ-2109 car is amazingly easy, but it is extremely important to understand what the main secret of proper heating of a car interior is.