Why isn't the air conditioner working in the car?

In hot summer, you can't do without a working air conditioner in your car. Many are in no hurry to contact service centers due to the poor performance of the air conditioner, explaining this with the phrase – "Well, as long as it somehow cools, I will not repair". But this is not necessary, because air conditioning is not only comfort, it is also safety. In heat with inoperative air conditioning, the temperature in the cabin can reach +40 degrees, which has an extremely negative effect on the well-being of the driver.

In this article, we will consider the basic problems that affect the performance of the cooling system in the auto.

Refrigerant leak

The refrigerant has a direct effect on how well the air conditioner works. For normal operation of the cooling system, a certain amount of refrigerant is required. And when its level decreases, the air conditioner starts to work worse. Refrigerant leakage can begin due to loss of tightness of the connection or due to mechanical damage. Finding a leak is quite simple with a leak detector, UV lamp or, in some cases, even with a simple visual inspection.

Compressor problems

In the event of a compressor breakdown during the operation of the air conditioner, noise will be heard and there may be leaks on the compressor itself. Compressor problems are often caused by poor condition of the drive belt. He can be either weakened or worn out. In the first case, the belt needs to be tightened; in the second case, it needs to be replaced.

Condenser failure

A condenser is responsible for cooling freon in an air conditioner. For normal operation, you need to regularly clean it. Due to the accumulation of dirt and dust on the radiator, overheating and shutdown of the air conditioner may occur. If this happens, you need to clean the radiator of the air conditioner as soon as possible.

Evaporator problems

An unpleasant odor and high humidity in the car interior indicate a malfunction of the evaporator. This is because the moisture drain tube is clogged.

Receiver dryer problems

If the hoses freeze and the air conditioner sometimes turns off by itself, then most likely the problem is in the receiver-dryer. Due to heavy dirt or incorrect filling, the filter cannot completely remove excess moisture.

Thermostatic expansion valve (TRV) malfunction

A spontaneous shutdown of the cooling system, freezing of hoses and periodic cooling signals a malfunction of TBR. Thermostatic expansion valve belongs to one of the thinnest components of structures. It is he who controls and regulates the supply of refrigerant depending on the pressure in the system. The most common causes of a thermostatic expansion valve malfunction are improper regulation, severe contamination of the system from the inside or the presence of air and water in it, and also refrigerant leaks or mechanical damage.

Pressure sensor problems

The pressure sensor turns off the system at especially high pressure readings, so as not to allow serious damage to the system. In most cases, this happens with excessive pollution, broken contacts or mechanical damage.

The main purpose of the pressure sensor is timely shutdown of the cooling system at particularly high pressure readings, so as not to allow serious damage to the system. In most cases, this happens with excessive pollution, broken contacts or mechanical damage. It is very easy to diagnose the problem using computer diagnostics in the conditions of the workshop.

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