1. Compressor does not work: you can listen to the noise when the compressor starts working in the car, or you can open the engine compartment cover to check whether the compressor belt works normally. When the compressor is not running, the air conditioner will not cool. The compressor does not work mainly because of the solenoid valve switch, and it is also a computer program problem. You can replace the solenoid valve or repair the computer program.
2. Abnormal air conditioning pressure: If there is nothing wrong with the solenoid valve, you need to check the air conditioning pressure. Whether the pressure is normal can be checked by an external pressure gauge. The abnormal pressure is mainly caused by the failure or leakage point of the air conditioning pressure sensor. The pressure sensor can be replaced or the leak point can be repaired.