Design of the heating system VAZ-2110
It includes three main nodes. This is a control unit for the VAZ-2110 stove, an air duct system, and a heating unit. The stove is controlled via an electronic unit. It consists of knobs with which the driver sets the required temperature and fan intensity.
The unit also includes a temperature sensor. As for the latter, it is necessary to automatically start the stove when the temperature inside the car drops more than two degrees below the set one. The sensor is equipped with a small fan. If you move the knob on the controller to position A, then a small electric motor is started in the heating unit, which controls the damper. The temperature sensor itself in the VAZ-2110 can be found on the ceiling, near the lighting lamp.
Another important component of the heating system is the air ducts. They pass directly from the stove itself, and each channel has its own separate function. Thus, the central channels are designed for interior ventilation.
The air distributor is responsible for supplying cool air to the cabin for ventilation or warm air for heating. The other two air ducts are designed to heat the interior in the back row. The rest are also intended for ventilation. Two side channels heat the mirrors and part of the interior. Separate nozzles are used to heat the driver's feet.
Problem solving
Now let's talk about how to solve emerging issues, troubleshoot problems and return the heater to normal operation.
Each breakdown requires separate consideration.
Broken motor
The VAZ-2110 stove does not work
If the stove on a VAZ-2110 has completely stopped working, this may indicate a failure of one of the elements of the heating system. In this case, to determine the cause of the malfunction, you will have to check the functioning of absolutely all parts of the heating system. This is a labor-intensive task and requires the performer to have certain knowledge of electronics. It is also necessary to understand the technology of functioning of the car’s heating system.
Diagram of the automatic heater control system: 1 – fan electric motor; 2 – additional resistor; 3 – controller; 4 – mounting block; 5 – ignition switch; 6 – cabin air temperature sensor; 7 – recirculation switch; 8 – recirculation valve; 9 – micromotor gearbox for heater damper drive; A – to the instrument lighting switch; B – to power supplies
Most often, the VAZ-2110 stove does not work due to a fan failure. It can be easily replaced with a new product. In second place is the thermostat, which is also replaced in case of malfunction.
Failure of a vehicle's heater in most cases results in the need for major repairs. In this case, you need to calculate the possible costs of purchasing new parts and compare them with the price of a new stove. Experts recommend that if the stove fails completely, it should be completely replaced. Very often, the VAZ-2110 is equipped with stoves from the VAZ-2112 that are more advanced in design features and technical characteristics.
The temperature in the VAZ-2110 cabin is not regulated
Sometimes there are situations when the heater cannot be adjusted. Regardless of the position of the temperature regulator on the control panel, the stove either blows cold air or produces only a hot stream. Such discomfort may be caused by a malfunctioning temperature sensor or a failure of the heater damper.
You can check the operation of the sensor by turning the temperature regulator several times to the extreme maximum position. If the situation has not changed, then it is necessary to replace the sensor, which is located on the ceiling of the car, next to the ceiling light.
Temperature sensor in the passenger compartment of a VAZ-2110 car
Sometimes the VAZ-2110 stove does not heat up or only works at maximum speed due to a failure of the heater damper. In this case, it is necessary to remove the deflectors from the engine compartment, bend the fastening antennae and get to the valve. Often the damper gets stuck in one position, and it does not respond to the regulator inside the cabin. Then you need to try to move the stuck part. If it moves without effort, then the problem must be looked elsewhere.
The cause of the malfunction may be deformation of the damper due to high temperatures. Then it is necessary to replace the plastic valve that the car is equipped with from the factory with a more reliable aluminum part.
The heater damper micro-reducer may also be the culprit of the malfunction. If it fails, it will be impossible to adjust the temperature in the cabin. You can check this by removing the windshield trim and frill from the engine compartment. After this, it is necessary to test the movement of the damper lever when switching heater modes in the cabin. If the damper lever moves, then the micro-gearbox is working. Otherwise, it must be replaced.
If the VAZ-2110 stove does not work in any mode other than the maximum one, then the cause of the breakdown may be a failure of the heater resistor. The resistor may fail due to overvoltage in the network. The resistor is located on the right side of the stove. To replace it or diagnose it, it is necessary to dismantle the windshield cover and the vacuum booster. After this, using an ohmmeter, the resistance on the coils, which are responsible for converting the current into the required voltage for the correct operation of the heating system, is checked. If the indicators differ from the norm, then it is necessary to replace the product with a new resistor.
And also the problem may be in the disconnection of the fuse, which is located on the resistor board. In this case, you can eliminate the malfunction by soldering, however, you must first find the cause of the blown fuse. It may be in oxidized contacts or poor wiring insulation. Initially, you need to diagnose all elements of the heater's electrical circuit using a tester, find the weak link and eliminate the malfunction. Poor operation of the heater's electrical components can cause a short circuit or fire.
The VAZ-2110 stove blows cold air
Often, owners of domestic cars are faced with a situation where only cold air enters the cabin through the heater deflectors, regardless of the temperature setting. In most cases, the heater blows cold air after replacing or adding coolant. The cause of this malfunction is air entering the heating system of the vehicle.
If the coolant is replaced incorrectly, an air lock forms in the radiator pipes and hoses, which must be eliminated. This is not difficult to do. It is necessary to drive the car onto a hill or overpass, so that its front end is as high as possible. After this, you need to let the car idle for several minutes, periodically you need to gas it. In this way, the air lock can be expelled from the system.
Then you need to check the antifreeze level and, if necessary, add it to the required level in the expansion tank. Often, after carrying out such actions, the stove begins to work properly.
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The windows fog up, the feet are not heated
It is not uncommon for VAZ models to have a problem when air flows normally from the stove, but it does not heat the feet and does not flow onto the windows.
Modification of air ducts
The issue can be resolved by upgrading your air ducts and getting rid of existing gaps in the cabin and warm air intake channels. This is a rather complicated procedure, the implementation of which will allow you to forget for a very long time about the problem with the stove, which does not warm your feet and does not blow on the side windows.
It would not be superfluous to install a pre-start heater. Due to it, the interior warms up faster.
Supplying a weak air flow into the car interior
Owners of VAZ-2110 cars are often faced with a situation where both warm and cold air is supplied to the cabin, but under very low pressure. Accordingly, heating or ventilation of the interior requires significantly more time than during normal operation of the heating system. If the heater does not blow well, the cause of this malfunction may be a clogged heater radiator or vehicle cabin filter.
First, you need to check the condition of the cabin filter of the car. In dozens, it is most often located behind the glove compartment on the passenger side. If it is heavily polluted, then air flows through it poorly and provokes problems with the interior heating system. Contamination of a car's cabin filter can be eliminated in two ways. The first is high-quality cleaning of the filter and installing it in its original seat. However, this method is less effective. The problem will reoccur a few weeks later. A more correct solution is to replace the cabin filter with a new product. Moreover, the filter must be changed every fifteen thousand kilometers or twice a year.
Cabin filter of the VAZ-2110 car, requiring replacement
If after replacing the cabin filter the problem does not disappear, then you need to check the condition of the heater radiator. This is more difficult to do, since you will have to disassemble almost the entire heater from the engine compartment side. Poor flow of coolant in the radiator can be caused by both small particles of debris that can get into it, and the formation of scale inside the product. Antifreeze leakage through holes in the radiator may also be the reason for poor operation of the stove.
If the radiator is clogged with debris or scale, the problem can be eliminated by washing the product with special means. If there is a coolant leak, experts advise immediately replacing the radiator with a new part. Fixing the problem by soldering the radiator will help solve the problem for a very short period of time, after which the antifreeze will leak out again and you will have to re-disassemble almost half of the engine compartment to install a new part. It is also necessary to immediately check the condition of the hoses and pipes that go to the heater radiator and, if necessary, replace them.
Coolant leaks
The stove may not heat up due to the fact that the level of coolant, that is, coolant, decreases. Do not rush to add antifreeze to the tank. First, be sure to check for signs of leakage in the pipes and connections.
Problems with the stove on a VAZ 2110
If your radiator is leaking, the news is not good for you. You will have to dismantle it and, most likely, replace it with a new one.
The heater is very noisy
Many owners of the domestic “ten” are faced with a situation where a working stove makes a lot of noise. In this case, everything works fine, air flows spread throughout the cabin in the same way as the regulators are set.
The noise does not affect efficiency, but it becomes seriously annoying over time. Sometimes it seems that the stove will be covered with a copper basin, although it can make noise for a long time without consequences for the integrity of the device.
Let's try to figure out why it makes noise.
- If the noise is similar to a squeal, or the sounds are sharp, check the fastening of the lower part of the stove. The fact is that fastening is carried out using hooks that can come off. This is what makes the noise.
- The heater body sometimes gets damaged by the protrusions holding the retainer. In this case, the housing simply needs to be replaced with a new one.
- If the fan itself is noisy, remove it, clean it, and check the condition of the electric motor.
- The textolite washers, which are designed to prevent axial play of the fan, may also hum. Any low friction washers will be suitable as a replacement. For example, elements made of fluoroplastic. Be sure to lubricate the washer. Some people use regular machine oil, but it really only gives a temporary effect. The best lubricant in this case would be thick graphite grease or lithol.
Only hot air blows
Most often, the stove only blows hot air in a VAZ 2110 due to the fault of the car owner. If you recently bought a car, and in the summer you first tried the heater in cold air mode, you may notice that only a hot stream comes out of it.
The stove only blows hot air
This is due to the fact that the problem of damage to the damper micromotor was not solved in the best way. This micromotor is responsible for driving the damper and is located in the engine compartment in close proximity to the windshield. To get to it, you need to remove the frill and insulation.
Check to see if it is even there. Sometimes the micromotor gears wear out and the teeth do not touch each other. It is recommended to replace such motors. But some solve the problem differently - they remove the motor and turn on the damper manually. Yes, you can operate a car in this mode in winter.
But you should understand that because of this, the stove will constantly work in heating mode, driving hot air around the cabin. Therefore, switching to manual mode is a temporary measure, which should soon develop into a full-fledged replacement of the damper micromotor.
The heater on the VAZ 2110 is a very important unit that is responsible for the comfort and warmth of the driver and his passengers. Therefore, if signs of malfunction appear, do not delay stove repair. Especially if the cold season is approaching, and driving without heating will be very problematic.
Block responsible for temperature
The central unit in the stove system is the heating unit. Its main function is to directly heat the interior. This block is arranged as follows. An electric motor with fan blades pumps hot air, three dampers perform the function of recirculation and closing/opening the channels. There is also a heater core. On modern new generation systems, heat exchangers are not equipped with a tap.
Therefore, the radiator is always heated, regardless of the time of year. The manufacturer claims that this has solved the problem with constant faucet leaks. In addition, heating of the interior is significantly faster. In summer, supply ventilation occurs outside the radiator.
Modernization of the damper on the VAZ-2110
Malfunctions with the damper often result in the interior heating very poorly and slowly. The VAZ-2110 stove control unit is to blame. The controller is experiencing problems. The device does not send a command to extend the flap. In this case, it is recommended to check the temperature sensor. The controller handle is set to its extreme position and then twisted several times from the left to the right position. The temperature of the air flows must be checked by hand. In this way, the operating condition of the sensor is checked in one of the extreme positions of the handle. If the air flow changes the temperature when the knob is in the extreme position, then the sensor must be replaced. If the heating does not change, the cause is looked for in other places.
Results
You can start repairing the VAZ 2110 stove by watching the video on our website or finding another source on the Internet. However, it is worth understanding that the reasons for the incorrect operation of the heater may be different. Some of them will take no more than an hour to fix. Others will take several days and require replacement parts. Start repair work by checking the simplest causes and only after that examine more complex components. Naturally, the simplest solution would be to simply replace this unit with a new one and do it at a car service center, but reducing the cost of operating a car and a deeper understanding of its structure always requires personal intervention, patience and the desire to finish what you started.
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Fan problems
This will be indicated by noise or strong squealing while the car is moving. First you need to find out what is causing the fan failure. In some cases, the lower part on the heater housing falls off. Then the hooks are installed in place, which serve as fastenings.
However, it is more common to see broken tabs on the heater unit housing. Here the housing needs to be replaced. Another reason is uneven shaft expansion coefficients if the fan is heavily worn. In this case, experts recommend replacing the stove motor or its bushing. Sometimes the fan makes noise because of the washers, which are used to eliminate axial play. The element needs to be removed and cleaned. Replace the washer with a fluoroplastic one, then lubricate everything well.
Repair
As we have already noted, the design of stoves on dozens with carburetor and injection engines has practically no differences. Therefore, the repair instructions below are suitable for owners of a VAZ 2110 with both types of power units.
If you are planning to overhaul your old-style stove, we recommend starting with the purchase of a radiator. Use copper as it is more efficient and helps the heater work better.
To carry out repairs correctly, strictly follow the points presented in our instructions and rely on video materials.
- There is a plug on the engine block through which coolant is drained into any container. If you plan to use the same antifreeze or antifreeze again, choose clean containers.
- Next you need to move the frill forward. This process will take quite a long time, so be patient.
- Next, you need to remove the windshield wipers and get rid of as much as possible of everything that could interfere with the repair process.
- Remove the body of your stove. It is divided into two parts, which is important to know in advance. The front part of the stove body is removed directly along with the fan.
- After this comes the stage of dismantling the cabin filter. Check its current status. If the filter is dirty, this is an excellent reason to replace it.
- The next stage involves removing the second part of the housing.
- Loosen the clamps used on the hoses a little. This will allow you to easily remove the hoses.
- Having applied some effort, you can now finally remove the radiator from its seat.
If the stove does not work at first speed
Each fan speed (except the last) is connected through a separate heater resistor.
It is located not on the controller, but under the frill. One of the reasons for the inability to work at first speed is a faulty resistor. If the second speed does not work, then the reason is the same. But malfunctions can also be due to defects in the contacts on the board. Often, due to high temperatures, the board becomes very hot. As a result, contacts come loose. The entire board must be checked thoroughly. They look more carefully where food is served.
Replacing self-propelled guns
Control units cannot be repaired - they are simply replaced with new ones. But first you need to make sure that this mechanism is the reason. Instead of a broken one, install a working control unit. Its price is about 1500 rubles. The element is very easy to dismantle: just remove the buttons installed nearby. And then you can remove the device. The handles are set to zero positions and then removed.
Then the glass and front cover snap off. Before removing the heater control unit on a VAZ-2110, unscrew two screws in the front and one in the back. The board can then be pulled out of the case and carefully inspected to ensure its integrity. If there is damage to the board tracks, they must be repaired. Subsequent assembly is performed in reverse order. If the temperature on the control unit is not regulated, then the entire board should be inspected. There will definitely be defects. But before you pull out the heater control unit on the VAZ-2110, you need to check the fuse box. Perhaps there is a bad connection there.
Design Features
For the VAZ 2110, it is possible to install two types of stoves - new and old. Regardless of the engine used (injection or carburetor), there are no fundamental differences in the designs of the stoves.
But what is the difference between the new and old type stoves? Let's try to figure it out.
- Radiator design. This is the main difference between the devices. Therefore, when replacing a radiator from an old one to a new one, be sure to take into account the installation nuances;
- The controller knob on stoves is slightly different. Old-style heaters have a main problem - they have been discontinued. They cannot be an analogue for 4 and 5 position controllers, which began to be equipped with dozens of them in the fall of 2003;
- The micro-gear motors for the stoves are different, starting in September of the same 2003. The difference lies in the shaft position sensors (resistors). Therefore, when making repairs, make sure that the devices are truly interchangeable and that you bought old-style resistors for your old stove, not new ones. Otherwise the gearmotor will not work.
Setting the air temperature from the heater
You can set the desired temperature in the cabin using the adjustment knob. But for a more accurate result and adjustment, the block has a special screw. To check the accuracy of temperature control, close all doors and windows. Place a control thermometer in the sensor area.
Then the element is set to automatic mode, and heating is monitored using a thermometer. How long can the control unit of the SAUO VAZ-21102 stove be adjusted in time? The procedure takes no more than half an hour. If after 15 minutes the actual temperature does not correspond to the set one, then the block is removed. Turn the adjusting screw clockwise. If you rotate the screw clockwise, the temperature will increase, if counterclockwise, it will decrease. Then install the element in place and check that it is working correctly. As for the possibility of repairing faults, the control unit for the VAZ-2110 stove of the new model cannot be repaired (however, like the old one). In case of serious malfunctions, it is replaced entirely. Moreover, the cost is low.
So, we found out why the stove does not work and how to solve this problem.
