Why is the car air conditioner not cooling?

[DeWilliam]

There are several reasons why a car air conditioner may not be cooling properly: 1. Severe internal wear of the compressor; 2. Refrigerant leakage; 3. Circuit system malfunction; 4. Clogged receiver-drier; 5. Excessive moisture in the dryer or too much dust in the filter; 6. Overfilling of refrigerant in the car air conditioning system. Methods for maintaining a car air conditioner include: 1. Regularly checking the refrigerant and compressor oil; 2. Cleaning the condenser surface; 3. Cleaning the evaporator surface. The car air conditioning system, abbreviated as car AC, consists of a refrigeration system, heating system, ventilation and air purification devices, and a control system.