How to repair or replace the VAZ-2110 heater dampers with your own hands

In general, the problem is that the stove does not blow very warmly, the gear motor is broken (does not make sounds), I think it did not press the damper tightly, which is why the stove does not heat

IS IT POSSIBLE to somehow close the heat/cold damper manually?

2110, 2006, euro panel. I'll delete the topic myself.

Comments 25

You unscrew the wipers, unscrew the frill, on the left side of the car you put your hand to the stove and feel... I have a 2002 unit, I could barely get there to unscrew it, but it still worked... The fact is that the heater damper gear motor is not the same type, they are of different years and types, so it’s better to remove them, go to the spare parts store and ask for the same one... Mine cost 1800 rubles in the summer, and was not of the best quality (plastic), so I went through the mechanism of the old one, screwed it up well, pressed the case and put it back... It works ))) By the way, I have a topic about the stove and a hand-made homemade test controller (ala everything directly).

On the VAZ 10th family, which includes the VAZ 2110-2112 models, the designers used an electronically controlled interior heating system, thanks to which the temperature set by the driver is maintained automatically.

On the VAZ-2110, instead of a manual heater control mechanism with a cable drive of the main elements - the coolant shut-off valve and dampers, an automatic heater control system (AHC) controller with a temperature sensor and a gearmotor that regulates the position of the dampers are used.

In such a stove, the valve for shutting off the antifreeze supply is no longer used, and the adjustment of the heater operating mode - “heating” or “ventilation” - is carried out by a central damper, which directs the air flow through the radiator or bypassing it.

How malfunctions manifest themselves

The automatic temperature maintenance system used on the VAZ-2110 is more convenient in terms of control, since the automatic control system does everything independently, but is less reliable than a mechanical cable drive. Moreover, problems are caused by the electronic and electrical components of the stove - the controller, temperature sensor and micromotor gearbox, the central damper, which regulates the air supply to the cabin from the outside.

Problems with the operation of the VAZ-2110 heater related to the damper:

• lack of temperature control (only hot or cold air comes from the stove) regardless of the position of the handle on the controller;
• insufficient air heating (even when setting the handle to the maximum temperature);
• squeaks, knocks and extraneous noises after setting the temperature.

The cause of such problems is the central damper of the VAZ-2110 stove, which is adjusted by the controller through a gearbox. The design of the stove includes another damper - air distribution into zones. It is controlled using a handle mounted on the central air supply deflector into the cabin, so malfunctions with this part are rare.

Assembly of the unit

Interchangeability of gearmotors

When the work to restore the functionality of the MMR is completed, install it in place. For this:

• Insert the pin of the micromotor-reducer lever into the slot of the lever. It is located on the damper drive;
• If the lever is not turned properly, apply 12V voltage to the motor connector pins using two wires. We are talking about yellow wires here. This way you can return the lever to the correct position;
• Having installed the micromotor-reducer, check it for operability, plus watch how the damper drive of your heater moves, whether the heater control lever “plows” properly to regulate the temperature.

We will repair or replace the damper and heater drive, you will be able to return the heater to its previous functionality and independently determine what temperature regime will be set inside the cabin of your VAZ 2110.

We are finishing the VAZ-2110 heater. Manual control

And there is no guarantee that the new one will work happily ever after. But replacement is a troublesome and expensive task: the unit costs about 550 rubles.

So this embarrassment happened at the editorial “top ten” (see the material “Last Year’s Snow” - ZR, 2006, No. 3).

The simplest and most effective way to restore acceptable interior heating was to insert a figure-of-eight valve into the heater pipe (see photo). The work takes only 15 minutes, and all you need is a knife and pliers. The valve control cable (the control cable for the air damper of a Zhiguli carburetor is suitable) can be conveniently brought into the cabin under the steering column. The air damper of the “tens” heater must be secured in the “hot” position. Access to it is with a long screwdriver through the removed air duct grille in the center of the instrument panel (“dashboard”).

To restore the heating control that is natural for the “ten,” instead of an unreliable electric drive, we installed a blind control cable from a GAZ truck, adjusting it to its length. Oh, the Bychka heater cable fits, but its price, like the gear motor, is 550 rubles...

The mechanical control of the damper fits the “ten” so well, as if this option was included in the design from the very beginning.

We remove the frill and the faulty gear motor, saw off the square shaft from it. We make a lever from metal, and a clamp from an M8 bolt (see figure).

We drill a hole in the panel and fasten a cable pre-adjusted to its length in it (we cut the cable sheath so that it serves as a limiter for turning the lever).

We insert a piece of the square shaft of the gearmotor into the damper axis, put a lever and clamp on it, insert the cable into the hole in the clamp, turn the damper to the “warm” position (the cable is recessed) and fix it.

Now the manual damper will last forever.

Features of the design of the VAZ - 2110 stove damper

Note that VAZ-2110 of different years of manufacture uses heaters that differ in design:

1. Old-style stove damper

Old heaters use two central dampers, one of which blocks the flow of air into the cabin from the outside, and the second one redirects the air flow to the heater radiator or bypasses it. They are interconnected by drives and opened by a micromotor gearbox.

2. New sample

In the new type of stove there is only one central damper and it is connected by a drive to the gear motor directly, and not through a lever.

3. Under the “Euro” panel

Structurally, such a stove does not differ from the new type of heater, but in it the damper for distributing the air flow into zones is controlled by another micromotor gearbox.

It is easy to visually distinguish the stoves by the location of the heater fan. In the old-style interior heater, the fan is located horizontally, while in the new model, it is positioned vertically. Their gearmotors are also different.

Causes of malfunctions

Depending on the design of the stove, the damper may cause a disruption in the efficient operation of the heater for the following reasons:

• deformation;
• wear of seals;
• deterioration or damage to control levers and rods;
• skew.

Deformation is a problem with old-style heaters. The first dampers of the VAZ-2110 stove were equipped with plastic elements that bent under the influence of temperature. Because of this, even when completely closed, cold air from outside leaks in and mixes with the heated air, and the efficiency of the stove decreases. Subsequently, the designers replaced the plastic flaps with aluminum ones and the problem with deformation disappeared.

To ensure tightness, the dampers have seals that reduce air leakage. Initially, foam rubber seals were used, which quickly wore out and became damaged. Later, foam rubber was replaced with rubber, but this only extended the service life of the seal; over time, the rubber ages, cracks and collapses.

On old-style stoves, rods and levers may break. On new heaters, there is another problem - wear on the edges of the square end of the gearbox, with which it is inserted into the groove made in the damper axis. As a result, the limit switch bypasses the groove, and the heater damper jams, although the gearmotor operates. The misalignment occurs due to the displacement of the damper axis in the mounting holes of the housing. Because of this, the damper warps and jams when opening.

Diagnosis of the problem

If the reason why the VAZ-2110 stove does not work is the damper, it is not difficult to identify it. To do this, disassemble the central deflector, turn on the ignition and rotate the temperature setting knob to its extreme positions. In a working stove, the central damper will not knock and will completely open and close the air supply channel.

If the heater damper does not move or stops in a position that does not completely block the air passage, it may be stuck. You can verify this by pushing the valve with your hand or a long rod. If after this the damper returns to its normal position, then this is the reason why it is jammed. Through the mounting hole of the deflector, you can assess the condition of the damper and its seals. If the damper is deformed, its bend is clearly visible.

Adjusting the heater dampers

By adjusting the dampers with your own hands, you eliminate the supply of part of the air “to the glass” when the lever that controls the air flow is installed in the heater in the “chest” or “legs” position. The photo shows the damper adjustment control units.

2 – adjustable rod for installing the damper “in the chest” – “in the legs” 3 – fastening the rod “in the chest” – “on the glass”. To do this, it is necessary to shorten the adjustable rod by three divisions, and use side cutters to bite off the tip protruding on it. After performing such operations, the heater damper will be in the desired position, and the heat from the stove will flow better in the given direction.

Repair and restoration of the stove damper

The deformed heater damper of the VAZ-2110 cannot be repaired; it only needs to be replaced. In this case, it is better to purchase a replacement metal part that is not so susceptible to temperature effects.

Whatever heater is installed on the VAZ-2110, to carry out repair work, the heater must be completely disassembled. In this case, the process of dismantling and disassembling depends on the design of the stove.

A positive aspect of the heater design on the VAZ - 2101 is its location - to get to it and the dampers you can from the engine compartment and you don’t have to remove the front panel.

Disassembling an old-style stove

For example, let's look at how to disassemble an old-style heater:

1. Remove the terminal from the battery.
2. We remove the windshield wipers, the seal, remove the air intake near the windshield (“jabot”) from the car, in the process you will need to disconnect the windshield washer nozzle tubes.
3. We dismantle the insulation that separates the stove body from the engine compartment.
4. We remove the gear motor.
5. We divide the housing of the stove and air filter into two halves. To do this, unscrew the coupling bolts around the perimeter of the housings and remove the mounting brackets.
6. Disconnect the fan power wires.
7. Remove the outer half of the air filter and heater housing (along with the fan).
8. We dismantle the inner part of the fan housing.

After this you will have access to the dampers. If you are only planning to repair or replace the heater dampers, there is no need to drain the antifreeze, since the heater radiator will remain in place and will not be removed.

Before removing the dampers, carefully inspect and remember their position and the way they are engaged. Further actions depend on the nature of the damage. Deformed damper parts cannot be repaired and only need to be replaced. As for damaged rods and levers, try to repair them or simply replace them. The damaged seal is replaced.

Let's sum it up

Malfunction of the VAZ-2110 heater damper is a common malfunction, especially in vehicles with old-style heaters. Breakage in most cases is due to the quality of plastic dampers, which are very often subject to deformation. It is possible to repair and replace the VAZ-2110 stove valve yourself without the help of professionals. Before starting work, you need to understand that in order to carry out high-quality repairs and restore the previous functionality of the heating system, the stove will have to be completely dismantled.

Despite the complexity of the work ahead, the result will please the driver and passengers of the vehicle. A high-quality repair of the heater damper and its drive guarantees stable operation of the vehicle’s heating system at any time of the year.

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The standard problem with this heater is that it blows only cold or only hot air and does not respond to the position of the temperature control knob.

To begin with, remove the central nozzles, move the air flow direction handle to the left all the way (position - all into the cabin) and see how the damper behaves.

Turn on the ignition, change the position of the temperature regulator from “minimum” (blue dot) to “maximum” (red dot) and look at the damper

If during this check the damper does not move, then in most cases the jammed micromotor gearbox of the heater damper drive is to blame.

It also happens that the damper seat is destroyed if it (the damper) is plastic. Such a malfunction can be determined by ear - you can hear the gearbox operating, but the damper does not change position. And sometimes you can hear clicks of the square shaft turning in the seat.

If the damper does not move during such a check, then you can first try to help the gearbox. Turning on the ignition and moving the temperature knob from one extreme position to another, pull the damper with your hand. This must be done carefully and without unnecessary effort. If it works, then this can be regarded as a half-measure, because... If you have already found the reason why it jammed, it will jam again soon anyway. But if it “releases” and the damper starts working, it becomes clear that you need to look for the cause in the gearbox itself.

If a miracle does not happen and the damper still does not respond, then you should check the power supply to the gearbox and its control unit.

Checking the heater control system.

Heater control circuit

To check, connect the tester to terminals x1.2 (pink) and x1.8 (brown). Turn on the ignition (the automatic control system only works when the ignition is on). When you move the temperature knob to its extreme positions, a control voltage of 10V should appear for 10-15 seconds. Also, each time the temperature knob is moved to its extreme positions, the polarity of the control voltage should change. If there is no voltage at all, then the ACS controller is faulty. Attention! Do not short-circuit these contacts or apply voltage to them under any circumstances.

(for example, battery plus). This will kill the output of the operational amplifier of the automatic control system, designed for only 1A, and you will have to repair or replace the unit. It is worth noting that the old-style blocks (several types, all with automatic speed, with the letter “A”, the speed handle has four or five positions) are interchangeable with each other, but not interchangeable with the new-style block (without the letter “A”, five speed positions - “0-1-2-3-4”).

If the heater only works in extreme positions or you suspect that the gearbox is working and its shaft is turning in the damper seat, then you should check the serviceability of the damper position sensor.

How to find out the reasons for the breakdown of the VAZ 2110 heater damper and troubleshoot problems?

The most common problem is when the heater regulator does not perform its functions, that is, it does not respond to the driver’s commands. A hot or cold air flow comes from the air duct, regardless of the position of the regulator.

In this article we will look at how to change the heater damper of a VAZ 2110 , but first we will dwell on the causes of the breakdown.

If the gearbox is in good condition, and the damper does not “respond” to the driver’s manipulations, then characteristic clicks are heard when the regulator is switched. This indicates that the shaft is turning inside the structure. Repair can only be done in one way - replacing the old damper with a new one. It must be emphasized that the old dampers are made of plastic. In turn, the new design is made of metal. For a tight fit to the surface, gaskets made of rubber are used.

Why does the stove fan run at the same speed?

If you want to check the stove for functionality, you should not immediately start disassembling it. If the VAZ 2110 heater motor only works in the third or first two modes, then most likely the problem lies in the resistor. If the first two modes work through it, the third operates directly. If your resistor has burned out, there is no need to completely repair the heater . You can simply replace the faulty component. This will significantly save not only your money, but also time, since disassembly is not a simple process.

First step: check the functionality of the device

Before ordering a new damper from an online store and performing repair work, you need to make sure that such actions are up to date. It is possible that the old-style VAZ 2110 heater damper could become loose, jammed, or jump out of its place. To check you need:

• start the car;
• set the regulator to different positions;
• manually move the flap.

The plastic damper has a huge disadvantage: when high temperatures occur, the plastic becomes deformed. As a result, the valve may jam, and only cold or hot air will enter the cabin.

Old-style dampers are installed on VAZ-2110 cars manufactured before 2003. As a result of manual movement of the valve, the functionality of the stove can be temporarily restored. But such work cannot be called a full-fledged repair, since after some time the problem in question will manifest itself again.

It is important to pay attention to in what case the valve can be controlled. The breakdown may be hidden in the micromotor-gearbox if the valve is controlled with the engine running and the regulator in the extreme position.

Also, do not exclude the control unit and microfan from the list. These elements can also cause the problem in question.

A malfunction of the control unit, fan and gear motor indicates that the stove needs to be replaced. This is the only solution to the problem. If the work is not completed in a timely manner, the motorist needs to prepare for more serious consequences and expensive repairs.

Of course, before opening the damper of the VAZ 2110 stove manually and moving it, you will need to remove the deflector. The air duct deflector is dismantled directly from the seat without the use of additional tools. The work must be done carefully so as not to break the wire contacts.

Functionality check

If you do not want to spend a lot of money on repairing and replacing the device, you need to first check whether such manipulations are required. To do this, you can try to return the displaced damper to its rightful place.

• Turn on the ignition;
• Switch the regulator to different positions;
• Manually move the flap;
• This way it can be returned to its original position.

Of course, you first have to dismantle the deflector to gain access to the damper. If this method works, the damper will be able to work again as before, which means it will respond to the regulator.

But this cannot be considered a full-fledged measure for restoring the functionality of the damper, since if the socket is already loosened, the unit will no longer be able to work normally. At first, you will apply the half-measures described above over and over again, but over time you will still have to replace the heater damper on the VAZ 2110.

How to remove the stove on a VAZ-2110 car?

Carrying out repair work will require some effort and time. But the most important thing is to adhere to the sequence of actions. To do this you need to do the following:

1. drain antifreeze or other coolant;
2. disconnect the car. To do this, you need to remove the negative terminal from the battery;
3. dismantle the windshield trim and the Shumka;
4. remove the fan;
5. disconnect the pipe from the stove;
6. Remove the front part of the air intake. To complete the work, you will need to dismantle the dashboard. The work must be done carefully and slowly. Fastening elements are unscrewed inside the cabin. They are the ones who hold the stove;
7. dismantling the spring brackets and fasteners of the front housing of the heating equipment;
8. disconnecting all hoses from the radiator;
9. removing the rear casing from the stove;
10. dismantling the radiator of heating equipment.

Installing a new damper on a VAZ 2110

Before installation, you must ensure that the fork is securely coupled to the lever. The valve should be in the raised position. If this is not done, the device will not function. The procedure for installing the device follows the same pattern as disassembling, but in reverse order. At the final stage, coolant must be added to the system. It is recommended to ensure that there are no leaks in the system. Now you can turn on the heating equipment and check its functionality.

It is important to pay attention to the tightness of the connections. Only if the damper is carefully attached to the surface of the heating stove is the flawless functioning of the system guaranteed.

If your car has a standard valve made of plastic, it is recommended to replace it. The disadvantage of old valves is the foam seal, which does not have a long service life. Modern dampers are made of metal, and the rubber seal has fairly high performance characteristics. This design is practically not subject to temperature effects and fits tightly to the surface of the stove. The modernized seal plays an important role in this.

Assembly

Position of the damper
After this, reverse the assembly procedure according to the dismantling steps. Refill the system with coolant and check that the new damper is in place. It is important to ensure that there are no leaks and that the hose connections are not tight.

Turn on the stove and check how the heater behaves. If everything is normal, you have carried out competent and successful work, for which we congratulate you.