The stove is blowing cold air. Causes, repairs

Each driver at least once in his life came across the fact that the stove was blowing cold air. In winter, it is impossible to warm the car interior to a comfortable temperature and to warm the frozen windows. The operation of the vehicle becomes impossible especially at very low temperatures.

Heater interior. Work and device

The interior heating system of the car includes an electric fan, supply and coolant circulation pipes, a radiator, shut-off valves, air lines and air flaps. The heating element is located in the front panel housing. Two radiator connections are connected to the radiator housing, through which fluid flows into it. Movement of coolant is carried out under the influence of the water pump, the cooling system of the power unit. When the motor warms up, the heat exchange process takes place. Tosol takes away the excess heat from the engine, thereby cooling it. When the shut-off valve is open, the hot cooling liquid enters the heater's radiator housing, at the same time, the electric fan of the stove pumps cold air into it. Thus, the radiator gives its heat to the air flow, which in the warmed-up state enters the car's interior.

To effectively operate the system in winter, it is necessary to warm the engine well. It is enough thirty degrees, that the heater began to submit warm air in salon. Turning the system on immediately after starting the engine will only increase the warm-up time of the engine and the interior itself. Experienced drivers recommend to include a fan of the VAZ stove at the time when the temperature of the coolant reaches fifty degrees. This indicator is most effective in the morning warming up of the car in the frost of both the engine and the cabin. Otherwise, you run the risk of losing valuable time and it's useless to burn fuel.

Basic Faults

When the stove is blowing cold air, this can be caused by several different causes of a malfunction in the cooling or heating system. Each damage has its own character and ways of elimination. The most frequent breakdowns include: the presence of an airlock in the heating circuit, a malfunctioning state of the thermostat, a breakdown of the regulator's drives, a contamination of the filter element in the passenger compartment, clogged cells of the radiator fuser casing, and impaired pump impeller. Next, we will look at these faults in more detail.

Airlock

As a rule, air enters the system when some elements of the system are depressurized, as well as when the amount of cooling liquid in the expansion tank decreases drastically. How are these problems resolved? The first step is to check the level of antifreeze in the expander. It is necessary to carry out this process only on a cold engine. The amount of liquid should be within the maximum mark, but in no case should this figure be exceeded. If the level of antifreeze is below the minimum mark, then it should be topped up. If the level falls frequently to a minimum or until the expander is fully emptied, leakage may occur. In this case, it must be urgently eliminated. The flow of air must be carried out as follows. Set the car on a flat surface, remove the cover from the expander. After that, start the engine and, increasing the speed several times, top up the antifreeze.

Water pump

If the stove is at idle, blowing cold air, then the worn out petals of the impeller may be the cause of the malfunction. Basically, this happens when the car is not the first freshness or the system used a variety of cooling fluids. What happens at this moment? A worn pump impeller at the time of low engine speed can not create the optimum pressure in the system for full circulation of the antifreeze. To eliminate this problem, you just need to replace the pump.

Thermostat

Due to the malfunctioning state of the thermostat, the temperature of the cooling material may not reach the optimal value or significantly exceed its value. So, at the moment when the thermostat jammed in the open state, and the car moves in urban conditions, the heater will heat perfectly. But when driving at high speeds, the temperature regime of the liquid will decrease significantly - the stove will not warm well. A faulty thermostat can not be repaired, it is also replaced with a new one.

Drive of the regulator "warm-cold"

This mechanism of the system can affect the fact that the stove is blowing cold air. The reason lies in the control drive device itself. Basically, all control devices of this type are equipped with metal cables. At some point, the switch can jam in one position. At that moment, if the regulator stalled in the "heat" position, then warm air will enter the salon. Its temperature will depend on the degree of opening of the damper at the time of jamming. But if the damper control is stuck in the closed position - the stove is blowing cold air.

Regardless of how the elements of control and control of the flaps and fenders of the stove (lever, wheel, disc switch), they have the same fault. Often there is a breakage of the traction elements (cable, rod) from the fasteners on the cranes and control levers. Rarely, the ropes become clogged and rusted in the protective case and move poorly in it.

At the time when the stove is blowing cold air due to a malfunction of the control actuators, and it is not possible to perform a full repair (for example, on the road), it is necessary to manually turn the shut-off valve to the "open" position. In cars in which the temperature control actuator is carried out by means of electronic mechanisms, first of all it is necessary to check the condition of the fuses of the system. But basically it is recommended to address in the nearest car-care center.

Heatshift

Clogging the cells leads to a deterioration in its throughput. Often this is due to the use of poor-quality cooling fluids in the cooling system or the long service life of the heater radiator. That's why the stove is blowing cold air. Eliminate this type of malfunction in several ways. Rinse the radiator with a special rinse aid, change the connection of the nozzles. If, after carrying out these operations, the situation does not change, then it is necessary to replace the stove with a new one.

Replacement of heater

As a rule, the heater radiator is changed in two cases: when it can not be restored due to clogging or if it is rotten and leaks. It happens that even a new heating element can flow. Basically, this is due to poor-quality materials of the purchased product.

Replace the heater radiator at home. To do this, follow the sequence of the repair process. It is important to note that repairs are easier to carry out with a partner. In this paragraph the process is indicated, how the Kalina stove is dismantled and installed.

Step-by-step process of dismantling:

• First you need to drain about three liters of coolant.
• For unobstructed dismantling of the radiator, remove the accelerator pedal and raise the brake pedal as far as possible.
• The steering column is removed. First remove the protective panels from the column. Then disconnect the electrical connector from it.
• We disconnect details of an intermediate propeller connection of the steering mechanism and we unscrew a fastening скобу from a body. After these works we completely remove the steering column.
• We remove the "toad" stops, located on the right side of the brake pedal.
• Now, hanging the brake and accelerator pedals in the up position, we get the access to the radiator.

Before removing the stove, the following work should be carried out from the engine compartment. We remove the battery, its mounting cavity and the bracket of the base. We disconnect a branch pipe of the air filter and we bend it aside salon. Then unscrew the coolant pipes from the heater radiator fittings. Removing the nozzles it is possible to leak the tosola from the stove, which there remained in a small amount.

Operating from the interior, the hacksaw blade for metal, saw off plastic pipes. Then the stove "Kalina" is withdrawn together with a sealant and a metal protection element.

Install a new

Installation of a new radiator:

• We install a new radiator in its seat. For greater ease of installation, we cut off part of the plastic nozzles beforehand.
• By placing the radiator in the passenger compartment, connect the engine coolant supply connections to its outlets.
• All subsequent work is done in a reverse order to the removal.

Advice for experienced motorists

Before removing the stove, it is advisable to get in advance new pipes to connect it and replace them with the radiator. This is due to the fact that they can lose their initial characteristics in the process of work, and their separate replacement is additional financial and time costs.

Replacing the heater heater on a car is a time consuming process, often it takes a lot of time. In order to avoid permanent repairs of this nature, it is necessary to install only original and high-quality parts on the car, and also use only reliable and tested materials as coolant. It is advisable to diagnose the heating system before the onset of the cold season so that in the future it will not have problems with it in the winter.