What to Do When Vehicle AC High Pressure Fails to Rise?

[DeLeonardo]

Here are the methods to address the issue of vehicle AC high pressure failing to rise: 1. Unscrew the protective cap of the AC refrigeration system's service valve, press the valve core (check if refrigerant sprays out) to verify the presence of refrigerant in the system. Turn on the AC and check if the AC switch is functioning properly. 2. Observe whether the AC compressor clutch is working normally, if the drive belt is slipping, and if there are any abnormal noises when the AC compressor is operating. 3. Inspect the condenser to ensure airflow is not obstructed, check for any debris between the condenser and radiator (remove if necessary), and verify if the condenser fan motor is functioning correctly. 4. Through the refrigerant sight glass, observe the amount of refrigerant in the system, check for any bends or kinks in the pipeline that might cause obstruction, and inspect the condenser, refrigerant hoses, and other pipe connections for oil stains (if found, perform a leak test at those locations).