High Pressure Safety Valve HVAC: Testing and Inspection

A/C Compressor Pressure Relieve Valve, Checking

CAUTION!
There is a danger of ice-up.

Check valve drains coolant when engine is running and pressure in coolant circuit is too high.

Turn engine off.

• Function: protects refrigerant circuit against excessive pressures

Checking pressure relief valve on A/C compressor (Sanden)





• The pressure relief valve - arrow - has operated when refrigerant oil is found in the close vicinity.

• In this case, vehicle must be taken to an authorized service workshop.

Checking check valve on A/C compressor (Denso)





• The pressure relief valve - arrow - has operated when refrigerant oil is found in the close vicinity.

• In this case, vehicle must be taken to an authorized service workshop.