Mode 4 of the VAZ 2110 stove does not work

High-quality operation of a car’s heater in winter is one of the main conditions for comfortable driving. In domestic vehicles, even in new models, the heater is one of the problematic elements that very often fails. And if in the summer you can turn a blind eye to this, then in cold weather you immediately have to take measures to eliminate the problem.

To eliminate the malfunction, it is first important to diagnose which element of the car’s heating system has failed and repair the non-functioning unit. The easiest way is to turn to specialists for help, but their services are not very cheap. Very often, vehicle owners troubleshoot and repair the heater on their own, since domestic cars are highly maintainable.

This article will talk about how to diagnose a malfunction of the VAZ-2110 heater control unit and repair it yourself.

Design features of the VAZ-2110 stove control unit

One of the common heating system problems that VAZ-2110 owners encounter is the failure or malfunction of the heater control unit. Dozens of them are equipped from the factory with stoves, which are coordinated through an automatic heater control system. In short, the system is called the SAUO block. The main indicators of its malfunction are the operation of the heating system not in all modes. If one or more stove speeds do not work, then most often the problem is in the ACS unit. Thanks to the electronic module of the VAZ-2110, the temperature set by the driver is maintained in the car interior.

Before you begin repairing the VAZ-2110 heater, you need to find out what kind of heater is on your vehicle. Cars that were produced before September 2003 are equipped with old-style stoves. Accordingly, there are significant differences in the design, which are important to pay attention to during repairs.

The ACS unit consists of electronic elements, which are coordinated using handles on the central console of the machine.

The VAZ-2110 stove control unit is equipped with a controller with two handles. The right handle is responsible for turning on a certain fan speed. An additional resistor is directly responsible for switching its speeds. Old style stoves have resistors for two or three fan speeds. The new model stoves have a modified resistor RDO 2123–2118022. The unit for coordinating the operation of the improved stove model has four speeds and does not have an auto mode.

The left handle is responsible for turning on the temperature mode in the vehicle interior. Depending on the position of the handle, information about the set air temperature is supplied to the micro-reducer of the damper drive and, using the controller, the required position of the damper is set. Using the regulator, you can set the temperature from sixteen to thirty degrees Celsius.

Until 2003, cars were equipped with old-style stoves with four- and five-position controllers, which are now out of production and are very difficult to find. Also, the simple VAZ-2110 heater control unit is not suitable for car models that were produced after 2003 and are equipped with modified stoves from the factory.

Accordingly, before buying parts to repair the heating system of a vehicle, you need to look in the technical documentation to find out which heater model is on your top ten. The stoves differ not only in the ACS unit, but also in the heater radiator, micro-reducer, and resistors.

Malfunction of the VAZ-2110 heater. Solving the problem associated with the SAUO block

As a rule, the majority of problems that are directly related to a heating device that refuses to function normally can be identified by a motorist only with the onset of winter. Only in cold weather can a malfunction appear, consisting in poor heating of the interior or the banal impossibility of changing the location of the speed mode switch.

Experienced specialists, through whose hands more than one domestic “ten” has passed, call problems with the stove, and in particular, incorrect operation, a real disease of the VAZ-2110. With such a problem, the car owner simply cannot switch the Nth speed of the stove. Let's figure out how to remove the heater switch on a VAZ-2110 and repair the system.

The automatic heater control system plays an important role in the life of the stove. The device controls the damper according to a certain principle: the information received by the device regarding the temperature difference is fed to the controller. The damper closes or opens in accordance with incoming signals that appear on a small gear motor that drives it.

As for the performance of fan speeds, everything is not simple here. A low rotation speed is ensured by an additional resistor with two spirals, the resistance of which is 0.23 and 0.82 Ohms. If the electric motor of all available spirals is activated, the first fan speed begins to function. A spiral with a resistance of 0.23 Ohm is responsible for the functionality of the second rotation speed of the unit. If only the electric motor works (the resistor is inactive), the fan rotor switches to third speed with a frequency of 4100 rpm.

Diagnostics of serviceability and dismantling of the stove control unit

The SAUO module is located on the center console of the car and is responsible for proper heating of the interior. Repairing the VAZ-2110 stove control unit requires certain knowledge in electronics, so before you begin repairing the part, you need to determine whether the problem is really in the electronic module itself.

To do this, you must initially dismantle the unit and install a known-good part in its place. Take the SAUO unit from friends or at a service center to diagnose the heating system of your car.

Before performing any work on the vehicle that involves electronics or wiring, turn off power to the battery to avoid shorting or burning out the electronic components.

Then you can proceed directly to removing the unit through which the functionality of the stove is coordinated. To do this, the buttons that are located on the sides of the stove are initially dismantled. The heater controls must be switched to zero positions. Only then can the module be pulled out. This must be done very carefully, since the power plugs are connected to the back of the unit. As soon as you see them, they must be carefully disconnected so as not to damage the contacts. At this point, dismantling can be considered complete.

The working unit is installed on the standard seat, and the operation of the vehicle’s heating system is checked. If the stove functions correctly with the new unit, then the fault is in the ACS unit itself. Otherwise, it is necessary to diagnose other elements of the heating system.

Fan replacement

If the problem still lies in the fan itself, then it would be best to replace it with a new one. The stove fan can, of course, be repaired, but this may involve, for example, replacing the brushes. It simply doesn’t make sense to carry out more comprehensive repairs, since you can’t hope for long-term service for such a part. Replacing a VAZ-2110 stove fan requires selecting a new part. There are two options here: find an old-style part or buy a new spare part. The second option is more acceptable and accessible.

The replacement process is not as complicated as it might seem. It is enough to be able to work with standard tools, have free time and have the desire to tinker with your own machine. To replace a faulty fan, you must follow the following work plan:

Open the hood and remove the battery negative terminal.
We remove the windshield wipers by prying and dismantling the rubber caps. Using a 10mm wrench, unscrew the nuts and remove the brushes.
Using a slotted screwdriver, pry up the decorative plugs, unscrew the screws on the frill and the nuts on the edges. Now we can remove the frill.
Under the rubber seal you can find screws that hold the shield from the engine compartment. We also unscrew them.
We dismantle the hose through which washer fluid is supplied to the injectors.

On the right side of the engine compartment, there are two nuts on the bottom side that fit a 10mm socket wrench. They are difficult to get to, but you don’t have to unscrew them all the way, because with a few turns the shield can be easily removed.
It is necessary to remove the clamps from the hose that connects to the vacuum booster of the brake system in advance.
There are four self-tapping screws on the cabin filter cover; after unscrewing them, you can easily remove it.
Already at this stage the outlines of the stove motor are visible. But you will also need to disconnect the block on the heating system motor and on the resistor.
After the work has been done, it becomes possible to dismantle the left side of the stove along with the motor.
A new part is installed in place of the damaged element, and assembly is carried out in the reverse order.

If you have never had to remove a heating system fan before, this process may take several hours. But in the future, any problem with the heating system can be fixed much faster. Even if something doesn’t work out for you during your work, you don’t need to stop trying to achieve a positive result. Over time, everything will definitely work out.

Adjusting the stove controller

The manufacturing plant provides for heating the interior to the specified temperature in fifteen minutes with a deviation of up to two degrees. Use the controller knob to set a comfortable temperature in the car interior.

To check the proper functioning of the stove, use a regular mercury room thermometer. If after fifteen minutes the interior has not warmed up to the required temperature, the controller must be adjusted.

To do this, pull the heater control module back out and rotate the temperature regulator, first to the maximum value, then in the opposite direction. After carrying out such actions, install the unit in place and check the operation of the stove again.

At the same time, it is necessary to check the operation of the heater dampers. If there are extraneous sounds when switching temperature modes, then you need to check the condition of the dampers. If cold air flows well, but hot air hardly flows in, then the lower damper is faulty. If there is no normal flow of cold air but there is a good flow of hot air, there is a problem with the upper damper. The reason may be deformation of the dampers under the influence of air of different temperatures. In this case, it is better to replace the standard plastic dampers with aluminum analogues, which are more resistant to temperature changes.

After adjusting the controller, all heater elements are installed in their original places. Assembly is carried out in reverse order.

Let's sum it up

Malfunctions of the VAZ-2110 heater control unit can lead to both incorrect functioning of the vehicle’s heating system and complete failure of the heater. During the cold season, this will affect not only a comfortable stay in the car, but also safe driving for the driver of the vehicle.

Repairing the stove control unit can be done on your own if you have basic knowledge of electronics, a desire to work and improve your comfort.

High-quality repairs and timely regular inspections of the unit before the onset of cold weather will help you save money on stove repair services at service centers and the purchase of expensive heating system elements.

VAZ heater system

In the VAZ 2110 car, the heater control system plays a rather important role. If it breaks down, the heater itself stops working correctly. It can heat up the interior too much, or, conversely, not warm it up at all. Therefore, at the slightest breakdown of the control system, it should be repaired immediately or replaced altogether, otherwise it will be impossible to regulate the heating intensity of the car’s stove. On the VAZ 2110, the heating control system can be adjusted independently.

Heater Fan Doesn't Work on VAZ 2110

For what reasons can a VAZ-2110 fan fail?

Anyone who has traveled long distances in freezing temperatures without working heat in their car knows how frustrating it can be.

Make sure that the fan heater in the VAZ-2110 car is not working, it is simple and straightforward. All this is required from the driver.

run the machine engine and switch method to check whether the room has warm air flow. The following points indicate a faulty injector:

The interior does not receive warm air flow;
When switching modes, strange sounds are heard;
The device's fan runs
at a certain speed.

If the car owner discovers the latest error, the cause of the failure should be sought not only in the car fan, but also in the toggle switch or resistor.

For what reasons can a fan stop functioning?

If your car's heater fan stops working, there are a few root causes that need to be analyzed. The fuse may have blown. This is the burnt part that most often turns off the furnace fan.

And although it is easy to replace even by a car owner with little experience, this event is quite troublesome and time-consuming. This is because finding a place where the closure was difficult, because to do this you need to go through the entire heating system.

It is useful to know that the safety fuse must be responsible for the operation of the following elements of the car:

Glovebox.
Lighter.
The system is responsible for heating the rear windows and mirrors.
Headlight washer.

And this indicates that if the injector cannot detect the breakdown location, then it will be necessary to look at all the wires that supply the above elements.

Poor assembly of the internal parts of the main prefabricated unit is also often the cause. Sometimes the fan breaks or heats up the interior poorly due to internal oxidation of the contacts, which occurs when the main unit of the car heater is poorly assembled.

The heater fan of VAZ 2110, 2111, 2112 does not work

VAZ 2110 stove fan does not work

. The low speed modes are gone.

VAZ 2110 stove fan does not work

How to find the right video. about it here Support the project! MAP.

To make sure that oxidation is the cause of the malfunction, it is necessary to mix the plates of the device together with the boot to which they are attached, with a little force.

If during this manipulation the device begins to release slightly, but still catches warm air inside the car, then this is enough to remove the shoe to repair the fan, clean all contacts and place it in its original place.

Other Possible Causes

These include the following options:

The fluid enters the car's ignition relay. To find out that the fan is breaking down precisely because the relay is flooded, one effective tip will help. If previously the “decomposed” fan turned on again as soon as the car engine had been running for 20-25 minutes, that is, after the car had warmed up, we can say with confidence that the cause of the malfunction was a flood. To get rid of this problem, you need to replace the ignition relay, which has become unusable.
If during the test it turns out that the fan operates at only one speed, namely the third, it will be necessary to check the functionality of the additional resistor. This item supplies voltage to the fan directly only in 3 speed mode, so if the unit does not start working on 1st and 2nd, you will need to replace this part.
A car heater fan may stop working due to a breakdown of the switch, which is responsible for the operation of the entire heating system. To verify this, you need to remove the central part of the console, start the engine and use a light bulb with a power of no more than 12 V, equipped with connecting wires and wires with a “-”, to cover the body of the machine. The second wire checks the operation of all three contacts that belong to the additional resistor. If the light does not light, it can be considered working, otherwise it is necessary to replace the fuse and check the integrity of the electrical circuit.

If all of the above breakdown options have been analyzed, but the VAZ-2110 furnace fan still does not work, you need to check for several additional reasons:

operability of the device’s electric motor;
check motor contacts;
Make sure the brushes are not stuck and if they are stuck on the main body.

The information in this article indicates that it is not so difficult to find out the reason for the failure of the VAZ-2110 fan.

There is a special offer on our website. You can get a free consultation with our corporate lawyer by simply submitting your question in the form below.

Source: https://autoviber.ru/ne-rabotaet-ventiljator-pechki-na-vaz-2110/

System Features

VAZ 2110 heating system control

The heater control system has the following features:

Stove components

Usually in winter there are problems with the operation of the stove. For some, it stops heating the air worse, for others, it does not heat at all. There are even cases when the air does not heat up, but cools down, because it is not working properly. Perhaps one of the elements of the heating system has been damaged. Let's look at what it consists of:

Controller. It is also called the SAUO block. With its help, the required temperature is set. It also regulates the flow of cold or warm air to heat or cool the interior.

Determining the cause of the malfunction and eliminating it

Problems with the stove may occur for the following reasons:

Coolant is leaking. Due to its lack, the cooling system does not work correctly, including the stove. In this case, a malfunction is observed only during a decrease in temperature. To resolve this problem, you should check the fluid level in the appropriate tank. If it is less than the Max mark, then you should top it up.
The heating radiator may be faulty. To determine if it works, you need to touch it. As a rule, during the heating process it becomes warm or even hot.
There may be an air lock in the system. To get rid of this problem, you should make sure that the front wheels are slightly higher than the rear ones. Turn on the engine and leave it like that for a few minutes.
The heater may be leaking in some places. In this case, its complete replacement is necessary, since it will not be possible to eliminate this problem through repair.
If the stove “blows weakly,” then the problem may be in the cabin filter. It should be changed.

Note: If you want the filter to remain operational as long as possible, you should install a guard on the air intake.

It is possible that the controller is not working. The solution is to completely replace it.
In addition, the heater damper may not always switch on time. Therefore, sometimes instead of warm air there can be cold air and vice versa.

Replacing any part will not be difficult. Typically this process takes no more than 5 minutes. However, a problem may arise during the process of replacing the micromotor gearbox. In this case, you will have to remove the frill, as well as the sound insulation of the engine shield.

Possible problems with the damper

As noted earlier, the stove has several dampers. However, problems can only arise with one of them. To determine which one is faulty, diagnostics should be carried out.

Pay attention to how the damper moves when switching temperatures. If you hear extraneous sounds during this process, then there is a problem with the damper.
If cold air blows normally, but hot air does not, then the problem is with the lower damper. At the same time, if hot air flows normally, but cold air does not, then the problem is with the upper damper.

You can determine the causes of problems in the car’s heating system with your own hands, since such work is not at all difficult to do even at home. However, the cost of repairs may vary. After all, several different parts often need to be changed. Sometimes, on the contrary, you just need to clean certain parts from dirt. Of course, before starting repairs, it is worth reviewing photos and videos on this topic. Instructions wouldn't hurt either. In addition, you can use the questions/answers section on many Internet sites.

The decision to replace the heater damper drive with convenient automatic control appeared almost simultaneously with the release of the 2110 VAZ model. A variety of methods have been proposed and tested. But it has not yet been possible to choose the final result. As a result, the automatic heater damper on the VAZ-2110 is installed in various ways.

When making an electric drive for the stove damper, you should take into account the following nuances:

– what type of automatic control system is installed, since this affects the connection diagram; – decide which micromotor gearbox (MMR) is installed on the heater (if this MMR was produced before 2005, then it needs to be improved).

Options for upgrading the heater damper to automatic adjustment:

1. Use a standard gearmotor from a VAZ-2110 model car. 2. Use the stepper electric damper drive from the VAZ 2170 (Lada Priora).

The difference between these two options is that in the first you have to fix (delay) the position of the button until the damper is in the desired position. Only then release the button.

As for the second option, it is the most successful. Because setting the damper, based on the selected position, occurs automatically.

So, about these two options in more detail:

Improvement of the heater damper using a VAZ 2110 gear motor.

To do this, the following components are required:

– presence of a VAZ 2110 gearmotor; – if there is a desire to remake the gearmotor lever, then a VAZ 2110 micromotor gearbox, produced before 2003 (1,300 rubles); – presence of a button – to control the gear motor (50 rub.);

We fix heater malfunctions on a VAZ 2110

This question worries many car enthusiasts, especially when the first severe frost and dank damp weather clearly remind us of the coming of winter. I also faced the same problem. The heater in my car either didn’t heat up at all or only warmed up very poorly.

Well, when instead of the expected warmth cold air blew out of it, my patience ran out. I decided that I needed to get rid of this problem as soon as possible, otherwise in severe frost you won’t be able to get far in such a car.

How did I manage to repair the stove? Very simple. The accumulated knowledge plus a little experience, which I now share with you. I hope that my recommendations will help you repair your heater and avoid freezing in winter.

There may be several reasons why the VAZ 2110 stove does not work. They all depend on various factors. Let's look at them in more detail:

Lack of coolant in the engine cooling system.
Heater core malfunction.
Faulty cabin filter.

When the VAZ 2110 heater does not work due to lack of antifreeze, it is very easy to fix the problem. Just check the coolant level in the expansion tank. A radiator malfunction can be determined by its condition. Make sure it's hot.

If not, then it could be due to an air lock. Eliminating it is also not difficult. Drive the front wheels onto some bump and let the car run for a few minutes at medium speed. Be sure to check if the radiator is leaking.

Perhaps this will be the reason for the stove failure.

Is your car's heater blowing weakly? Replace the cabin filter. I'll tell you one little secret. To ensure that the cabin filter lasts as long as possible, install protection on the air intake.

Solution options

Please note that the stove may not work even if the radiator is working. In this case, the reason should be sought in:

problems with the controller or micromotor gearbox;
interior air sensor on the ceiling;
shaft position sensor;
heater damper.

Now let's take a closer look at what problems can arise with the heater if the radiator is working.

If there is a problem with the controller, the easiest way to troubleshoot the stove is to replace the old part and test it in action. The whole job will take you no more than five minutes.

If the micromotor-gearbox breaks down, you will have to tinker a little. Here it is necessary to remove the engine soundproofing shield and the frill.

Cold air

If the VAZ 2110 stove stops working and cold air is blowing out of it, then the breakdown may lie in a faulty interior sensor on the ceiling. Now I will explain the principle of operation. When the sensor is disconnected, the micromotor reducer receives a signal different from the temperature in the stove. This is why the fan stops working in high-speed “A” mode.

If the damper moves only in the extreme positions, given that the temperature sensor is disabled, there may be two reasons for the malfunction:

Controller temperature sensor malfunction.
Micromotor sensor malfunction.

If your vehicle has a pre-2001 controller, the voltage should drop after approximately 13 seconds. Maybe a little less or more. The reduction occurs in the min position.

In the max position, the voltage is supplied constantly. If the controller is a new model, then after 13 seconds of operation in both modes it will simply turn off.

If the voltage remains unchanged at the output, then this part is faulty.

Damper

The reason why the stove on a VAZ 2110 with an injector does not work may be a faulty damper. The heater has two dampers - upper and lower.

The upper one controls the flow of cold air, and the lower one controls the flow of hot air. This problem can be easily fixed. In old-style stoves, the damper is made of plastic. It has foam seals.

In new heaters, the dampers are metal and have rubber seals.

If, when you move the damper, you hear a rumble and cold air blows from the stove, then the damper may be broken or its drive has failed. If there are cracks or splits on the plastic flap, they can be glued together with dichloroethane. The metal flap is quite difficult to break, but it can easily jam. It often gets stuck due to rust.

If this was the problem, I would advise you to paint it. This will solve the problem.

This concludes the description of all possible options. I am the owner of a dozen and here I described in detail my actions during the last stove breakdown. She took a lot of patience from me. But I feel sorry for the swallow. And I want to ride in comfort in winter.

I hope my advice will help you troubleshoot all problems. Return to top

Source: https://DaciaClubmd.ru/ne-rabotaet-pechka-vaz-2110/