Will the stove work without a temperature sensor VAZ 2110

Heating and ventilation of the interior remain an integral part of comfortable driving. The interior temperature sensor of the VAZ 2110 is one of the consumables that requires frequent replacement, since the heating system of the VAZ 2110 has a mileage of 20,000 km. starts working intermittently. How to check the part, repair and replace the controller.

Why the stove does not work in a VAZ 2110 family car

The heating system of the VAZ 2110 has several varieties. The older version was produced until 2001 and had on board the then current controller 1303.3854, which was later replaced by the newer 1323.3854. The changes also affected the material of the dampers, which rather made life more difficult for drivers than brought anything useful.

Despite all the inconveniences, this version of the VAZ is very popular among a large number of drivers due to the low cost of parts and its adaptability to domestic roads. You can either repair the heating system yourself or take it to a service center, where it will be quickly repaired by professionals.

If your VAZ 2110 stove does not work, then this may be due to several factors:

perhaps you have an antifreeze leak;
the ACS controller is faulty;
the temperature sensor is broken;
the dampers refused to work;
The temperature has ceased to be regulated.

Heating is one of the most problematic components of this car. It constantly goes into a state of malfunction and creates problems for both the driver and passengers in the cabin. In this article you will learn why the stove stopped working and how to quickly determine it.

Operating modes

You can configure the heater operation manually or automatically. That is, you can set the temperature sensor according to your wishes, for example, at 22°C. If everything is in order, then the manufacturers promise that the deviations will be no more than 2°C, after which the relay will turn on the heating again, and after reaching the specified parameters, turn it off. But if failures occur, then after checking the functionality, it is quite possible that the sensor or relay will need to be replaced.

You can set the automatic mode. For this there is a special screw, the so-called tuning screw. It is advisable to make adjustments with the windows and doors closed. The fan handle should be in position “A”, and set the temperature at your discretion.

This material will help you figure out why the stove does not heat well in the VAZ 2110:

Take a test thermometer to the salon. If after 15 minutes the temperature does not correspond to the specified parameters, then you need to remove the controller from the socket and turn its adjustment screw. Clockwise to increase the temperature, counterclockwise to decrease it. If this does not help, then the sensor needs to be replaced.

SAUO block without panel

In addition, you may need to install a new control unit, or even tuning the entire heating system.

How to check the cabin air temperature sensor

The most common problem is a broken temperature sensor. It is located on the ceiling, so in the event of a breakdown, it is best to start checking there. Take out the ends of the wires and apply 1.2 V to the plus and minus. Rotate the knob to the MIN and MAX positions. The blades should not move, otherwise the problem lies in the sensor itself. If you are confident that the automatic control system is working properly, you can also conduct a small experiment. To do this, turn off the cabin air sensor. In operating state, fan speed mode “A” will be disabled.

Otherwise, you can safely conclude that the fault was caused by the temperature sensor and quickly replace it. Fortunately, this component is not very expensive and is quickly installed, so both an experienced driver and a novice should not have any problems when replacing it.

If the furnace is not blowing, the problem may be more serious and require a more complex approach. Also, the cause of the malfunction may be broken contacts, which is a very common occurrence in this model. If there is no contact, all wires will have to be sorted out manually and cleaned.

Signs and causes of malfunction

Structurally, the temperature sensor consists of a sensitive element, which is located on the electric motor board, which turns on the controller fan. A fan is needed to track the temperature of the environment with an error of 1–2 degrees. Since the sensor is a component of the car's electrical circuit, its operation is affected by the condition of the wiring, terminals, and connector integrity. Characteristic signs of controller failure.

The device is buzzing. The fan in the controller unit is broken.
The signal from the sensor does not reach the ECU. Broken wiring, worn chip wires.
The sensor transmits an incorrect signal; the temperature in the cabin corresponds to the transmitted parameters. The board is dirty, the input voltage or output resistance is not normal.

How to check the serviceability of the SAUO controller

If you want to find out why the VAZ 2110 stove does not work , special attention should be paid to the ACS (automatic heater control system). This is where a multimeter comes in handy. Measure the voltage at the same time on the pink wire along with the brown contact, while at the same time turning on the ignition and turning the temperature knob. Also, do not forget about the controller model, since the voltage is reduced differently on different boards.

On controllers 1303.3854 (before the vehicle was produced in 2001), the voltage decreases after 13 seconds at the MIN mark, and at MAX it is constantly supplied and does not drop. At the slightest change in voltage, you can safely conclude that the controller is broken. On newer car models (2003 and higher), a more advanced block 1323.3854 is installed, and there is also a stove 2111-8101012. Although this solved some problems, these modules are not of high quality. The cause of failure of the 2110 is often the self-propelled gun system, so in case of the slightest problems it is worth paying attention to it.

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Multifunctional sensor internal temperature VAZ 2110

During cooling, the volume of defects in a VAZ car increases. Their number is multiplied by tasks associated with unstable operation of the heating system. They lead not only to discomfort inside the cabin, but also to frequent freezing of windows, including the most important thing - the windshield.

Functions and main malfunctions of the room temperature sensor

The heating system in cars of this brand is controlled by an alarm method. The pulses come from the electrical control unit. Temperature is a factor affecting every control system. The essence of its work is to compare the values on the sensor (16-30 ° C) with the actual heating intensity that it measures.

When a temperature difference is detected, the engine turns on. Its function is to change the flow of warm air using dampers and fan speeds. The internal temperature sensor is a thermistor or semiconductor resistor, which has a close relationship between thermal state and resistance. From the control unit to this device, voltage is supplied through an internal resistor.

One of the most traditional defects of this device based on a semiconductor thermistor is the discrepancy between the temperature values of the external part and the resistance. To correct this discrepancy, you need to know the main features of its operation. Typically, this defect manifests itself in a rapid increase in resistivity with small changes in the degree of heating of the external part.

In addition, there is a break in the circuit of the sensitive element directly to the converter, so you need to buy a new internal temperature . Periodically, a situation arises when the thermal state of the device shell changes within a certain small range, and the resistance increases in proportion to the voltage. As a result, the heat calculated by the device is less than it actually is.

Checking the dampers of the VAZ 2110 heater system

If the controller starts acting up, the dampers themselves may be faulty. It is better to carry out proper inspection in a timely manner to avoid damage. The stove itself has 2 dampers. The upper part is responsible for bringing cool air into the cabin directly from the street, while the lower part heats the flow directly from the heater. If one of the dampers or actuator breaks down, you will experience constant discomfort due to poor heating or excessive heat input.

The breakdowns themselves can be divided into several types. For example, often the damper simply “jams” or “jams.” The damper actuator, also known as a micro-gear motor, may be damaged. Some valves may jam due to rust formed on them. Most often this happens on new samples, since the material of the dampers is metal, while the old ones are plastic with special foam.

We recommend reading! What to do when you hear a knocking sound when turning the steering wheel in place.

If you do not hear the characteristic movement of the damper, remove the deflector in the main panel and simply move the damper by hand. If there is no movement, check the micro-gearbox, it is the drive mechanism of the damper. If the windshield is blown with warm air, and a hot stream enters the legs, it means that the damper itself has poorly blocked the air, which is constantly coming from outside the cabin.

Dismantling

Removal principle
To install a new interior temperature element, you will first have to remove the old one. It can be removed quite simply:

Four clamps, presented in the form of springs, are used as clamps;
Be sure to park the car on a level surface and turn on the handbrake;
For your own safety and comfort, do not forget to remove the negative cable from the battery;
Using a slotted screwdriver, move the box slightly from its seat;
Dismantling begins from the top of the sensor, which makes work more convenient;
After removing the device from its fasteners, do not jerk it sharply. The fact is that it is connected to two wire blocks. They are the ones that connect the sensor to the car’s electronic system. Carefully disconnect the wires, after which the dismantling can be considered complete.

How to check the heater damper micro-reducer

To test the micro gearbox, you must use an ohmmeter. On older versions of SAUO controllers, the minimum resistance should be in the range from 800 to 1,200 Ohms. In new samples this figure is 3.5–5 kOhm. Set the minimum mark on the heater control unit and wait 15 seconds. Next, simply disconnect the controller connector, measure the resistance between contacts X1.4 and X1.1.

When the temperature is set to the maximum level, the multimeter should output 3.2–5 kOhm, taking into account the fact that an old version of the controller is used. On the new one the indicator is 1.2–1.6 kOhm. If the indicators do not change, it means that the micro-gearbox shaft position sensor on the VAZ 2110 is faulty. In this case, take the car to a service center, as the replacement process requires the intervention of a professional. If you want to carry out the replacement yourself, carefully follow safety precautions.

There is no need to rush, as careless handling of spare parts can damage other components, which in turn will lead to even greater expenses and a mandatory visit to a service station. It is also recommended to purchase only high-quality equipment, because used spare parts can quickly become unusable and fail you at the most inopportune moment.

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.

Checking the resistance resistor

The resistor of this car model has 2 spirals. The first has a resistance of 0.23 Ohm, and the second - 0.82. If both spirals are used at once, the heater electric motor is used at the first speed, and the second is turned on at the first spiral. The third does not need resistance, so it works without a resistor and is considered the most powerful. A lack of antifreeze can cause a malfunction, and a malfunctioning thermostat or pump will make the situation much worse. If the cause of the breakdown is a burnt out resistor, replace it with a whole one. You can purchase it at any car market or service center.

The fuse can also cause a breakdown. Despite the fact that it is as simple as possible to find, the problem is much more difficult to identify. We need a 25 ampere fuse F18. It is located in the main mounting block and is also partially responsible for the cigarette lighter and heated rear window. Check all circuits, perhaps the problem lies in a short circuit.

The cooling system of the VAZ 2110 is very capricious and unreliable, so it is strongly recommended to regularly check it for serviceability. This will contribute to a comfortable ride and allow you to be calm about your safety, because inappropriate conditions can cause an accident.