What's the reason for a car's air conditioning suddenly not working?

[OJoanna]

Car air conditioning suddenly not working may be caused by refrigerant leakage, compressor issues, or electrical system faults. It is recommended to go to a 4S shop for inspection as soon as possible to identify and eliminate the fault. Refrigerant Replacement: Check for refrigerant leakage or quality issues with the car's air conditioning, and promptly add or replace the refrigerant. Compressor Issues: Check if the internal parts of the compressor are severely worn and unable to function properly. Also, check for refrigerant leakage. If there is no cold air compression or circulation, it naturally won't work, and the compressor needs to be replaced promptly. Electrical System Faults: Electrical system faults can effectively prevent the car's air conditioning compressor from working properly. If this happens, the owner can check if the circuit is unobstructed and inspect the solenoid valve of the temperature sensor. If any issues are found, repair or replace the parts promptly.