A/C Pressure Relief Valve

A/C Pressure Relief Valve

NOTE: If the A/C compressor is operating within limits and the A/C pressure relief valve is venting, or if the A/C pressure relief valve is leaking around the threads, replace the A/C pressure relief valve and O-ring. If the A/C pressure relief valve still vents after it is replaced, diagnose the refrigerant system for a restriction.

An A/C pressure relief valve is incorporated in the compressor manifold and tube assembly to:

- relieve unusually high refrigerant system discharge pressure buildups. For specifications regarding operating pressure(s), refer to Heating and Air Conditioning.
- prevent damage to the A/C compressor and other system components.
- avoid total refrigerant loss by closing after the excessive pressure has been relieved.

The A/C pressure relief valve is a separate component and can be replaced separately from the A/C compressor manifold and tube assembly. It is necessary to recover the refrigerant before removing the A/C pressure relief valve.