What are the reasons for the sudden failure of the Volvo S90 air conditioning to cool?

[WalkerAnn]

Volvo S90 air conditioning suddenly not cooling reasons are as follows: Air conditioning compressor belt is too loose: If you turn on the air conditioning in the car and hear a squeaking sound, it is likely that the air conditioning not cooling is caused by the compressor belt being too loose. Insufficient refrigerant: The common refrigerant code is R134A. The consequence of insufficient refrigerant is that it affects the cooling effect of the air conditioning, leading to insufficient cooling. Generally, the refrigerant is in a relatively closed environment. However, after long-term use of the vehicle, the components in the air conditioning system may age and wear out, causing leaks in the refrigerant space, resulting in insufficient refrigerant. Air conditioning filter is too dirty: If the filter is too dirty, not only will it cause more impurities to be inhaled into the car, which is harmful to health, but the dirt will also block the air conditioning filter, so part of the cold air from the air conditioning will be blocked, making it feel like the air conditioning is not cooling.