What are the reasons for the car air conditioning compressor not working?

[DeJohn]

Reasons for the car air conditioning compressor not working: 1. Circuit system failure, short circuit or open circuit in the circuit directly loses the path for power transmission, and the electromagnetic clutch cannot normally control the working state of the compressor; 2. Lack of refrigerant, refrigerant and refrigeration oil are mutually soluble, circulating back to the compressor through the system. If the Freon in the refrigerant is exhausted, it will lead to insufficient oil return of the refrigeration oil, reducing the lubrication effect of the compressor and causing it to jam and damage; 3. Mechanical wear of the compressor, long-term operation under high-speed load conditions may cause premature mechanical wear of compressor parts, making it unable to work; 4. The belt is too tight, excessive tightness of the belt will directly cause the compressor to jam and not operate, so it is necessary to frequently check the tightness of the belt. At the same time, excessive looseness will cause the compressor's transmission power to slip, resulting in intermittent refrigeration effects and reduced power.