As soon as the first cold weather arrives, some drivers are faced with a non-working stove in their VAZ 2110. The reasons may be different, malfunctions in mechanics and electronics.
To find out the causes of the breakdown and fix the problem, first of all you should study the Lada heating system and the essence of the stove’s operation.
In the course of their work, the mechanics were able to identify a number of the most common causes of a non-working stove on a VAZ 2110:
- the heater operates in one temperature mode at a certain speed or the temperature is not regulated at all;
- the shutters responsible for air distribution and then do not work;
- breakdown of the damper temperature sensor (located on the ceiling of the car);
- breakdown of the SAUO controller;
- Antifreeze heater radiator leaking.
Once all of the above points have been diagnosed and the cause of the stove failure has been determined, you can proceed directly to the repair.
Checking the operation of the automatic control system
To diagnose this system, you need to have a multimeter so you can measure the current on the pink and brown wires.
The voltage can have different values, it depends on which controller is built into the car. For example, in older cars - before 2002 - heater control controllers 1303.3854 were installed, in this case the voltage at the minimum position changes in about 14 seconds, and at the maximum value it is supplied stably. Therefore, if the voltage of the ACS unit at the output has a constant value, it is faulty. On newer cars since 2003, the built-in unit is 1323.3854, and the stove is 2111-8101012.
When faults are found in the controller, the dampers may be faulty. To determine other reasons for the breakdown of the car's 2110-12 heater, you will most likely need to disassemble the heater.
Diagnostics of heater system shutters VAZ 21I0
The VAZ 2110 stove has two shutters.
Through one, cold air is absorbed, and through the other, hot air is supplied. If the wire mechanism malfunctions, you may encounter the following disadvantages:
- The stove doesn't heat well
- There is no hot air flow at all,
- high air supply temperature,
- temperature is not regulated.
Shutters can have various types of breakdowns:
- It happens that the damper gets stuck or malfunctions, and the micromotor gearbox can also fail.
- Also, the damper may stop functioning due to rust, because there are two types of dampers.
There are old and modern samples of shutters,
- old ones - made of plastic and sealed with foam rubber,
- and modern ones are made of metal with a rubber seal.
If you cannot hear the damper operating, then try moving it after removing the deflector.
The disadvantage of metal dampers is that breakdowns often occur due to rust, while plastic ones tend to deform due to the supply of hot air.
In the case where the shutters do not move at all, diagnose the microdetector.
Common stove malfunctions and options for eliminating them
Owners of tens often encounter a problem when the heater in the vehicle does not heat well or has stopped working. With the onset of cold weather, you have to sort out the car’s heating system and look for the causes of malfunctions.
Finding the original source of the problem is not always very easy. Sometimes, in order to find and fix a problem, you have to check almost all parts of the vehicle’s heating system.
Parts of the heater of the VAZ-2110 car
To make troubleshooting easier, we will consider the main indicators of improper functioning of the stove, possible sources of malfunctions in each specific case and options for eliminating them.
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.
We recommend: Where is the engine number of a car?
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.
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.
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 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.
We recommend: Winter off-road tires - what can be installed, look at studded and non-studded models
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.
Checking the micro-reducer of the stove shutter
To check the shutter drive, have an ohmmeter with you.
In old-style automatic control system controllers, the resistance at the minimum value of blue current should be from 850 to 1250 Ohms, in modern ones - 3.4-5.6 kOhms. If you want to check, you need to set the air supply temperature mark to the minimum value and hold for about 20 seconds. Disconnect the controller connector and, with the motor running, measure the difference in resistance in contacts XI.4 and XI.1. At the maximum temperature value in old controllers, the multimeter shows a resistance of 3.1 to 5 kOhm, in new ones - 1.3-1.5 kOhm. If the resistance does not change the readings or is absent altogether, this will indicate a malfunction of the micro-reducer shaft location sensor, which is associated with erasing the tracks, or a malfunction of the automatic control system itself, as a result of which no current flows to the micro-reducer.
In order to replace the micro-reducer you need to disassemble the stove.
Stove fan
Structurally, the fan consists of a DC electric motor with a commutator-brush assembly and an impeller mounted on the electric rotor. motor. The electric motor is powered from the vehicle’s on-board network. There are several modes of fan operation, the difference between which comes down only to the rotor rotation speed, and this is realized by inserting a resistor into the power supply circuit of the electric motor.
The fan operating mode is set using a handle located in the heater control unit on the center console. Initially, on the VAZ-2110, this handle was part of the design of the SAUO controller, but functioned separately from the controller itself. Later, the ACS added an automatic fan control function (position “A” on the handle), using which the controller regulates the rotation speed of the electric motor in order to maintain the set temperature.
We recommend: What to do if your diesel engine stalls
The electric motor used in the design of the VAZ-2110 fan is simple, but it has “weak points” - the commutator-brush assembly and bearings. Wear of these elements causes incorrect operation and complete inoperability of the fan. Short circuits and winding breaks in the stove drive are rare, but don’t forget about these breakdowns either.
Symptoms of failure. Heater components that affect fan operation
Signs of a malfunctioning stove fan are quite obvious and impossible not to notice. Common symptoms of failure:
- Increased noise, grinding noise during operation.
- Significant reduction in air injection efficiency.
- The fan does not turn on.
- Spontaneous change in the rotation speed of the electric motor.
- It can be determined by ear that the electric motor is operating under heavy load.
In some cases, such consequences result from malfunctions in the power supply and fan control circuits, so you should check them first. This applies to:
- fuse (blowout is the cause of complete failure of the electric motor);
- resistor (if it is faulty, some speed modes of the electric motor stop working);
- controller (the knob for switching fan modes is part of its design, so malfunctions of the automatic control system affect the functioning of the electric motor);
- wiring terminals of the power and control circuits (oxidation, damage to wires is one of the reasons for a malfunctioning electric fan).
If diagnostics of these elements shows that they are in good working order, it is necessary to dismantle and repair the fan itself. But it can be diagnosed first.
Fan check
A check is done by directly powering the electric motor from the battery (we lay wires from the battery terminals and connect them to the power terminals of the motor) - operation under load, difficulty in gaining rotation speed, squeals and squeaks indicate wear of the drive components and the need to replace them. But if, even with direct voltage supply, the electric motor does not start, it is most likely that it has burned out or the windings have broken. Such faults are difficult to fix and it is easier to replace the entire unit.
Design features of the stove of the old and new models
The design of the electric motor of the stove on the VAZ-2110 is identical, but the fans and their location are different. On models of the first years of production, the electric fan is installed in the stove housing in front of the radiator and it is located horizontally (old-style stoves). Afterwards, the design was revised - the fan was already placed in the cabin filter housing and installed vertically (new model heaters).
Despite the design features, dismantling the fan is a simple operation and does not require complete disassembly of the stove.
On a VAZ-2110 with an old-style heater, to remove the electric fan you need to:
- Dismantle the frill.
- Remove the front wall of the niche in which the heater is located.
- Remove the back cover of the fan housing by first unscrewing the screws and removing the clamps.
- Disconnect the wiring from the fan and remove it.
As for models with a new type of stove, the technology for removing the electric stove fan on such cars is different:
- dismantle the “jabot” and the front wall;
- remove the air filter;
- unscrew the fastening of the filter housing to the stove body and separate them;
- disconnect the wiring;
- remove the filter housing together with the fan;
- dismantle the electric fan.
We recommend: Cleaning and washing the cabin filter - all the pros and cons
After removing the electric motor with the impeller, we disassemble it, perform troubleshooting, replace worn elements and put it back together.
