The heater control unit is required forquality work stove car in the winter time. Only under the condition of normal functioning of the heating system will the driver and passenger be as comfortable as possible. Even in the most modern models of domestic cars, the heating system is one of the most vulnerable parts. Failure of components occurs very often. In summer, drivers usually turn a blind eye to a malfunction, but with the onset of the first cold weather, it is necessary to take corrective measures.
Before proceeding to repair, you mustmake a diagnosis in order to understand which particular component in the heating system is broken. The easiest way is to contact a service station, where an experienced mechanic will assist you in troubleshooting. Of course, you have to pay a tidy sum for the diagnosis. But on domestic cars, all repairs can be done independently so that the auxiliary heater will work as it should.
Very often with a broken stove, it turns outthat the fault lies in the control unit. Injection cars VAZ-2110, for example, already come from the factory with microcontroller systems for automatic control of heating. If suddenly one or several fan modes refuse to work, the fault lies in the control unit.
With the help of an electronic system inside the cabinthe temperature that the driver will set will always be maintained. Of course, in the summer the air will not be cooled. But in winter the stove warms up the air in the cabin perfectly. On cars VAZ-2110, released before 2003, installed the stove of the old model. On them, the heater control unit (2110) has a different design and is not replaced by new devices.
The electronic unit consists of a microcontroller, onwhich signals from the handles on the front panel. The right switch is required to set the desired fan speed. A resistor is installed in the oven, with which the engine speed is adjusted. If your car is equipped with an old-style stove, then there are several resistances that are designed to adjust the rotational speed. But the stove is equipped with a new model of modified resistances.
The handle on the left is needed forchoice of temperature in the car. Depending on the position in which the handle is located, a signal is sent to the electric drive of the damper on which temperature to set. The microcontroller adjusts the position of the valve. The regulator allows you to set the temperature from 16 to 30 degrees Celsius.
On cars until 2003 releasestoves were installed, which had controllers with four and five positions. At the moment, you are unlikely to meet them in the sale, as the products were removed from production. Before buying spare parts for repairs, check which particular heater control system is installed on your car.
The control system module is located incenter console. It is possible to repair the electronic control unit for the heater, but only if you have at least general knowledge in electrical engineering. The easiest way to check the serviceability of a device is to install a known-good one instead (borrow it from a car with the same heater). Before replacing the units, be sure to disconnect the negative terminal from the battery - this will avoid the appearance of a short circuit in the power supply circuits.
There are no other diagnostic methods;only visually assess the condition. If there is damage to the case or board, the device will not work normally. The slightest damage to the printed circuit causes the entire control system to stop working, the desired temperature is not maintained at the desired level.
To remove the device, you must perform the following steps:
Try not to damage during the workwires, otherwise even a new, fully operational heater control unit will not be able to function normally. Installation is performed in reverse order.
And you can only connect the wires andcheck the performance of the entire system with a new device. If the heater still does not work, you will have to look for a fault in the other components of the car stove.
If the diagnosis turned out to be faultyThe control unit heater VAZ-2110, then you can try to repair it. Of course, it is best to install a new item. But its cost is quite high, and malfunctions in the device circuit are usually very simple. You only need to have a basic knowledge of electrical engineering, as well as be able to use a soldering iron and multimeter. Before you begin, be sure to disassemble the control unit.
Since the block has already been dismantled, onlyDisconnect the front cover, which has regulators. After this, it is necessary to disconnect the glass cover. Next, unscrew the two screws on the front panel with a screwdriver. Another one is located on the back. Then carefully remove the top cover of the control unit. Try not to harm the contacts and parts located inside the device.
Внутри корпуса вы найдете печатную плату, на which are located jumpers, contacts, resistors, microcontroller, capacitors. They are responsible for the normal performance of all heating systems. The control unit GAZ-3110 consists of the same elements. There may be such damage:
After repairing the unit, you need to assemble it inreverse sequence and set in place. After connecting the power to the battery, check the operation of the entire system. If it has not recovered, you will have to replace the heater control unit.
It is envisaged that he should warm up the cabin totemperature, which the driver asks, no more than 15 minutes. Moreover, the tolerance is less than 2 degrees Celsius. The driver sets the desired temperature with the handle. To check the correct operation of the heating system, it is necessary to use a mercury or digital room thermometer. Set the desired temperature, then turn on the heating.
Следите за тем, какие показания выдает комнатный thermometer. If after 15 minutes the specified temperature in the cabin is not reached, the controller will need to be adjusted. The procedure is quite simple: you just need to pull out the entire module, then rotate the temperature control knob to the maximum, then in the opposite direction. After this simple manipulation, you must install the device in place. Check that the interior heater control unit is working correctly.
Check how the flaps work in the stove.If there are extraneous sounds during temperature switching, be sure to check if the dampers are working properly. In the case when cold air comes in from the outside without problems and the hot one does not pass, then the problem most likely lies in the bottom flap.
If the hot air enters the cabinnormal, but the cold does not pass, then the fault in the upper flap. On all cars of the tenth model, the dampers very often fail, since they are made of plastic. Under the influence of temperature, this plastic is deformed, as a result of which the flaps stop moving. It would be much better to install aluminum instead of standard dampers, they are resistant to temperature changes.
Independently perform minor repairsthe electronic unit is possible, but if there is the slightest knowledge of electrical engineering. It is also advisable to diagnose all electric drives and the state of the flaps. It often happens that the hot air does not flow into the heater of the car’s interior due to a faulty filter: there are leaves or other objects inside. Carefully monitor the condition of your car and try to change all the filter elements in a timely manner. Only in this case there will be a completely autonomous heater, your intervention in operation will not be required.
