What are the reasons for Volkswagen air conditioning not cooling?

[Rylee]

Here are the reasons why Volkswagen air conditioning may not be cooling: 1. Lack of refrigerant: Refrigerant loss is mainly due to leaks. If the car's air conditioning is not working properly and the problem recurs after refilling the refrigerant, this should be noted. 2. Air in the air conditioning system: Once air enters the air conditioning system, it will cause excessive pressure in the cooling pipes, and poor refrigerant circulation will also lead to insufficient cooling. Such faults are mainly due to the deterioration of the sealing of the refrigeration system. 3. Damage to the air conditioning compressor, throttle valve, or expansion valve: There is a saying in the industry about air conditioning compressors: 'Low pressure high, high pressure low, replace the compressor.' The probability of air conditioning compressor failure is not high, while faults in the expansion valve and throttle valve directly lead to poor air conditioning cooling.