- Low Refrigerant Level:
- Although you mentioned the system has plenty of freon, double-check the refrigerant pressure once the system has shut off to confirm that the pressure is within the recommended range.
- Faulty A/C Compressor Clutch:
- If the compressor clutch is malfunctioning, it could disengage after 30 minutes, causing the compressor to stop and the air conditioner to turn off.
- Malfunctioning A/C Pressure Switch:
- The pressure switch monitors the refrigerant pressure in the system. If the switch fails, it may send incorrect signals to the A/C control unit, causing the system to shut off prematurely.
- Defective Expansion Valve:
- The expansion valve controls the flow of refrigerant into the evaporator core. If the expansion valve is faulty, it could cause the evaporator to freeze up, which would trigger a safety feature that turns off the system to prevent damage.
- Electrical Problems:
- Check for any loose or damaged electrical connections related to the A/C system. Poor electrical contacts can disrupt power supply to the compressor or other components, leading to intermittent shutdowns.
Addressing the Issue
To accurately diagnose and resolve the issue, it's best to consult with a qualified automotive technician who can perform specific tests on the A/C system, pinpoint the root cause, and provide an effective repair solution.
