What are the causes of car air conditioning system failures?

[Layla]

The following is a related introduction to the causes of car air conditioning system failures: 1. No refrigerant: When there is a refrigerant leak in the system and it goes unnoticed for a long time, this result occurs. To address this situation, first identify the leak point, repair it, then re-evacuate and recharge the refrigerant. 2. Refrigeration system failure: Internal pipe blockage is the most common fault in the refrigeration system. When the compressor is working, if a certain part of the refrigeration system is severely blocked and there is no refrigerant circulating, the cooling effect is lost. At this time, if a pressure gauge is used to detect the pressure values on the high and low pressure sides of the refrigeration system, it can be found that the pressure value on the high pressure side is lower than normal, while the pressure value on the low pressure side is in a vacuum state, and there is a significant temperature difference before and after the blockage. This fault usually occurs in the receiver-drier or expansion valve. Therefore, nitrogen can be used to blow into the inlet or outlet of the receiver-drier or expansion valve. If it is not smooth, it indicates a blockage and needs to be replaced.