Heating system VAZ-2107: device, causes of malfunction

The ventilation and heating system serves to create a comfortable climate for the driver and passengers inside the car. With its help, we, being inside the machine, can breathe fresh air, and also maintain the necessary temperature.

. In this article we will look at how the VAZ-2107 heating and ventilation system works. We will understand the features of its design, the main faults and methods for their elimination.

What does the ventilation and heating system consist of?

интегрирована в систему охлаждения двигателя. The VAZ-2107 heating system is integrated into the engine cooling system. Heating of air entering the salon takes place during the process of heat exchange of the coolant, which is carried out with the help of an additional radiator. It consists of the following elements:

• Heater;
• The control module;
• Air ducts;
• Adjustable nozzles.

What is a heater

The main element of the system is the heater, or as it is also called, the "stove". Its design includes:

• Plastic housing with air intake cover;
• Radiator with a tap;
• electric fan.

In fact, the heater - this is a real "stove". The upper part of its body is equipped with a adjustable air intake cover. Through it, the outside air enters the "stove." Inside the case there is a radiator of the heater, through which the heated coolant (antifreeze or antifreeze) moves. Due to it, air is heated. The radiator is equipped with a crane, which allows you to adjust the intensity of the coolant through it, or even to cover it. в теплое время года обычно отключается. In cars VAZ-2107, the salon heating system in the warm season is usually turned off. And this is done with this device.

By itself, the heated air can not enter the interior with the necessary pressure, even during a fast ride. For its injection serves as a fan with an electric drive (motor). It is also housed inside the heater housing. The "seven" fan can work in three different power modes.

Control module

управляется при помощи специального модуля, размещенного в нижней части приборной панели. The heating system VAZ-2107 is controlled by a special module located at the bottom of the dashboard. In its design includes three levers and a switch of modes of the fan of a heater.

The uppermost lever provides control of the stove cock. In the extreme left position it is closed, and the cooling liquid moves around the radiator. If the switch is moved all the way to the right, the refrigerant will begin to flow into it in full, heating the air to the maximum.

The middle lever allows you to close and open the air intake cover. In the left position it will be completely closed, and outside air can not enter the salon. The cover will fully open when we move the switch to the far left position.

предусматривает распределение воздушных потоков для обдува ветрового и передних боковых стекол. The VAZ-2107 heating system provides for the distribution of air flows for blowing the windscreen and front side windows. It is carried out with the help of the lower lever. In the right position the air is directed to the side windows, in the left - to the windshield.

The heater crane, the air intake cover, as well as the dampers that redirect the air flow, are driven by cables.

The fan mode switch is to the left of the control levers. It has four positions in which the fan:

• switched off;
• Works at the first speed;
• At the second speed;
• At the third speed.

Air lines

Air ducts serve to transport warm (cold) air to the windshield and side windows. There are only three of them:

• left;
• right;
• central.

Each of the air ducts is a plastic "sleeve" of a certain shape. At one end they are connected to the heater body, the second one to the corresponding nozzle. In order to reduce air losses during transmission, the joints are sealed with rubber cuffs.

Nozzles

A nozzle, or a deflector, is a device through which air enters directly into the interior. включает четыре дефлектора: левый, два центральных и правый. The VAZ-2107 heating system includes four deflectors: the left, the two central and the right. A special feature of the nozzle design is a mechanism that allows you to change the position of the slats inside it, redirecting the air flow from side to side, and also generally blocking it.

How it works

, несложно понять, как она функционирует. Having studied the device of the VAZ-2107 heating system , it is easy to understand how it functions. So, the air through the grilles on the hood of the car and the air intake cover gets into the heater housing. There, depending on the temperature of the coolant and the position of the flap of the stove, it heats up to a certain temperature, and moves further along the air ducts through the deflectors to the interior. The intensity of the air flow in this case depends on the speed of the machine (when the fan is off), or on the position of the fan mode switch. Changing the position of the lower lever of the control module, as well as the position of the slats in the nozzles, we direct warm air to where we need - on the windshield, on the side windows, or in the center of the cabin.

Injector and carburetor: is there a difference in the design of the heating system

ничем не отличается от той, которой оснащались старые карбюраторные «семерки». The heating system VAZ-2107 (injector) is no different from the one used to equip the old carburetor "Seven". Their design and principle of operation are absolutely identical. Radiators, their taps, electric fans and all other elements are interchangeable. может отличаться, это материалом изготовления радиатора «печки». The only thing the heating system VAZ-2107 (carburetor) can differ, this is the fabrication material of the radiator "stove". In the old "sevens" they were made of copper.

The common problems and ways to eliminate them

выходит из строя достаточно часто. Despite the simplicity of the design, the VAZ-2107 heating system breaks down quite often. The most vulnerable places are:

• The heater tap;
• Fan (electric motor);
• Radiator of the stove.

The crane of the heater "Seven", like all classic VAZs, breaks more often. The most popular fault is leakage caused by the depressurization of the enclosure. A similar problem is solved by replacing the spare part. Crane repair in most cases is impossible.

Another common breakdown is the breakage of the drive cable. To replace it, you have to dismantle the crane, because you can not get to its fastening from the side of the locking device without removing it. You should also monitor the tension of the cable. If you allow it to sag, the valve flap will not open completely.

As for the fan, you can not call it reliable either. Usually it breaks down with the onset of cold weather. The cause of malfunction of the motor at best become worn out bearings or brushes, at worst - breakage or shorting of the windings. Repair the motor or replace it with a new one.

The radiator of the heater also has two "illnesses": leakage and clogging. The first malfunction can be caused either by mechanical damage or by chemical processes. Today, radiators are made of aluminum alloy, which is not particularly resistant to technical fluids. And if the old copper radiators could still be sealed, then modern ones can only be replaced.

Clogging of the heat exchanger also occurs as a result of chemical processes. The scum gradually settles on the walls of the tubes of the device and over time limits the normal circulation of the cooling liquid. This leads to the fact that the air being pumped into the cabin does not warm up to the desired temperature. You can get rid of this problem by washing the radiator with special fluids, or in the extreme case - by replacing the device.