High Pressure Safety Valve HVAC: Testing and Inspection

A/C Compressor Pressure Relieve Valve, Checking

• Function: protects refrigerant circuit against excessive pressures

CAUTION!
• Frostbite danger!

• Excessive refrigerant outlet pressures are vented by the pressure relief valve with considerable force.

• Should relief valve operate, stay clear of venting refrigerant and switch off engine.

A/C compressor pressure relief valve - Sanden, checking





• Evidence of refrigerant oil in the area of the relief valve - arrow -indicates valve has operated.

• Replace valve and determine cause of excessive refrigerant system pressure.