Vehicles of the VAZ concern have one global disadvantage - the car's stove. Despite the fact that VAZ-2110 cars have already taken into account some shortcomings in the heating system, the situation with air distribution remains at an insufficient level.
Often, with the onset of cold weather, drivers are faced with the problem of poor-quality operation of the car’s heating system or its complete failure. An unforeseen situation must be resolved urgently, since improper functioning of the heater causes significant discomfort for the driver and passengers and reduces safe driving.
A stove installed on the dashboard of a VAZ-2110 car
The temperature in the vehicle interior is adjusted by using the VAZ-2110 heater damper, which often fails. Let's take a closer look at how to repair and replace the VAZ-2110 heater damper with your own hands.
Diagnostics of the heater damper operation
In most cases, stove problems appear with the arrival of cold weather, when it is one of the main attributes that ensure comfort in the vehicle interior. A common problem in dozens of stoves is the incorrect distribution of warm air flows that enters the car interior. Often a situation arises when the stove does not respond to switching temperature modes and supplies only cold or only hot air. Both the first and second options bring significant inconvenience for the driver.
Most often, under such circumstances, the culprit of what is happening is the heater damper of the VAZ-2110. Dozens that were produced before September 2003 are equipped with old-style stoves. They are equipped with plastic flaps, which tend to deform from high temperatures. And also very often the valve seat is destroyed, which makes controlling it almost impossible. When the valve is jammed in one position, only hot or cold air is supplied to the cabin. If, for example, warm air flows towards the windshield, but hot air flows towards the feet of the driver and passengers, therefore, the damper does not open completely. In a situation where the valves do not move at all, it is necessary to check the micro-gearbox - the drive mechanism of the part.
Micro-reducer of the heater damper of the VAZ-2110 car
If the problem is with the heater damper itself, then when switching modes, peculiar clicks will be heard, which indicate that its shaft is turning. In this case, repairing the damper is practically impossible; it must be replaced with a new product. For these purposes, it is better to purchase, instead of a standard plastic valve with a foam seal, a similar product of a new type. The modernized dampers are made of metal and have a rubber seal. The new damper is highly resistant to high temperatures and fits more tightly to the heater body thanks to an improved rubber seal.
The next element that can influence the operation of the valve is the micro-gearbox that controls its rods. If you cannot hear the traditional sound of the damper stroke when switching temperature modes using the regulator, then the cause may be the micro-gearbox of the drive. If it breaks down, it must be replaced, because restoring its functionality will not give long-term results.
Common faults
Most often, the VAZ 2110 suffers in terms of heating because the heater adjustment, as they say, does not work. Regardless of the selected position of the temperature control knob, only cold or, conversely, only hot air blows from the heater.
The reasons for this phenomenon may have different origins. Among them:
- Jamming of the MMR (micromotor-reducer) that controls the damper drive;
- The plastic damper (the first VAZ 2110 was equipped with these) has a destroyed seat, and due to jamming it is impossible to control it normally. If the gearbox is working, but the damper does not turn, you can most often hear peculiar clicks - this is the square shaft turning in the socket. For such a malfunction, there is only one treatment - replacing the old plastic damper with foam insulation with a new one. Better, more modern, metal, with a rubber seal. This one does not warp or warp like its plastic sister;
- To finally decide who to blame - the damper or the MMR, you still need to pay attention to its control unit. He is also among the “suspects”.
Repair of the VAZ-2110 heater damper
Repair of the damper is carried out only in a situation where it is skewed or jammed in a certain position. It is very difficult to call this a repair; it is most often a forced measure to extend its operation for a short period of time. If there are problems with the valve or its drive, then soon you will still have to disassemble the stove and replace the failed parts.
The repair consists of installing the valve in its standard seat. To do this, you do not need to completely disassemble the heater. With the ignition on, it is enough to try using manual adjustment to try to seat the valve in its seat. You can also remove the deflector and try to activate the damper by hand. If it starts to move, then you have a temporary fix. However, as previously stated, this is a conditional fix for the problem. If a part jams, it will soon have to be replaced, since the stove will not function correctly.
Location of the heater damper of the VAZ-2110 car
If, after restoring the performance of the damper with the ignition on, it is only possible to manually control the damper, then the source of the breakdown is the micro-gearbox.
Drive problem
When changing the damper, do not forget to check the functionality of the actuator.
Drive unit
If the micromotor gearbox does not work, it will have to be repaired or simply replaced with a new one.
- Having removed the trim and trim from the windshield, directly behind the vacuum booster of your “ten” you will find a micromotor gearbox. Disconnect two connectors from the amplifier - the micromotor and the micromotor-reducer. Now unscrew the screws and
- remove the micromotor gearbox. You have to remove the motor from it.
- Connect it to the automatic control system to check its functionality.
If the device does not work, you can try to repair it. For this:
- Bend the pressed side slightly and remove the lid;
- Check the condition of the commutator, brushes and bearings;
- Replace the specified components or correct them;
- If the gear teeth are worn out on the gearbox, it will have to be replaced;
- Be sure to lubricate the bearings. Ideally, a silicone-based lubricant should be used;
- If the above measures do not help, simply install a new unit.
Replacing the VAZ-2110 heater damper
Replacing the heater damper is not particularly difficult, however, it requires extreme care from the performer. In order to get to the valve, it is necessary to completely dismantle the stove. The main part of the work on removing the stove will be carried out in the engine compartment of the vehicle. Before directly disassembling the stove, it is important to initially disconnect the battery and drain the coolant from the heating system. After this, the windshield, soundproofing material, and heater fan are dismantled and adjusted. Next you need to disconnect the vacuum hose clamp.
The next step is to remove the front part of the heater housing. The work is quite complex, so to simplify the removal of the heater body, you can additionally dismantle the instrument panel and unscrew the fasteners from the inside of the cabin that hold the heater in place. After this, you can lift the heater from the engine compartment and remove the brackets and screws securing the front part of the heater. Only after completing this amount of work can the front part of the stove be dismantled without difficulty.
Next you need to disconnect all the hoses and pipes that go to the radiator. After this, the rear heater casing and radiator are dismantled. Only after these manipulations have been performed will access to the damper be opened. At this point, the preparatory stage of work can be considered complete. After this, you need to proceed directly to replacing the VAZ-2110 heater damper with a new part.
Repair and replacement of the damper of a VAZ-2110 car
Dismantling a damaged part and installing a new one is not particularly difficult. The only question that may arise during dismantling is how to remove the heater damper rod of the VAZ-2110. Although it is plastic, it fits extremely tightly on the shaft. To dismantle it you will need two screwdrivers. Use a thin screwdriver to lift the fastening lever, and use a second screwdriver to loosen the plastic protrusions of the rod. After disconnecting the rod, the upper valve will go down on its own, since nothing else will hold it.
When installing a new part, you need to pay attention to the fork located on the valve axis. It is important to secure it in such a way that it engages with the lever. When installed correctly, the heater valve should be in a raised position. In another situation, it will be impossible to adjust and replacing the part will not give the desired results.
When installing a new part, some drivers simultaneously modify the heater damper rods. The design of the rods has some disadvantages. When switching the damper control lever, you can see that in any position of the lever, the air flow towards the driver’s feet is blocked by either the first or second damper. To improve the distribution of air flow, it will be necessary to shorten the adjustable draft by three divisions. For this purpose, it is necessary to cut off the retractable rod end. Such a simple modification will help the damper to move to the required position, which will have a positive effect on air distribution. The flow of warm air will flow evenly to the driver’s feet, the side windows of the car and from the central deflector.
After this, all the removed parts are installed in the reverse order, and coolant is added. Care must be taken when connecting pipes and hoses. Only sealed connections will guarantee high-quality functioning of the heating system. After this, you can check the operation of the dampers and the entire heating system.
Repair of the stove damper drive
When replacing the VAZ-2110 heater damper, it is simultaneously necessary to carry out work to check and, if necessary, repair or replace the heater micro-reducer. It is located under the windshield trim, where the vacuum booster is located. To dismantle it, you need to remove two connectors - the micro-gearbox and the motor, and also unscrew the fastening screws. After this, the motor is removed from the micro-gearbox and its operation is checked by connecting it to the stove control unit. If it is faulty, then you need to replace the part with a new product. It is also possible to repair the motor, however, only in extremely rare cases.
A working motor is installed in the micro-reducer and it is mounted on a standard seat. This must be done very carefully so that the motor pin fits correctly into the lever connector on the heater valve.
After installation, it is necessary to check the movement of the damper drive levers by turning the temperature regulator in the vehicle interior. After checking the movement of the levers, it is necessary to reassemble all dismantled elements in the reverse order.
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.
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 with warmth and comfort in the vehicle interior. 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.
The main reasons for poor operation of an electric furnace
VAZ 2110 stove diagram
Before you can directly begin to find a solution to a problem, you need to be able to identify it quickly and effectively. First, it is advisable to consider the general structure of the furnace. So, the heater furnace consists of the following components:
- mounting block fuse;
- incendiary lock;
- ignition switch together with its unloading relay;
- a special switch that regulates the operating mode of the furnace electric motor;
- additionally built-in resistor;
- stove motor;
- heated rear window of the car, which contains a heater adjustment button with a light indicator;
- a special functional element for heating glass.
VAZ 2110 stove wiring diagram
One of the reasons for the malfunction of the electronic circuit of the furnace may be the lack of functional activity of the heater electric motor at both low and high speeds. In this situation, you must proceed as follows:
- First you should make sure that the fuse has not accidentally blown;
- If a blown fuse is detected, it will urgently need to be replaced with a new one.
