High Pressure Safety Valve HVAC: Service and Repair

A/C Compressor Relief Valve Replacement

1. Recover the refrigerant with a recovery/recycling/charging station.




2. Remove the relief valve cover (A), the relief valve (B), and the O-ring (C). Plug the opening to keep foreign matter from entering the system and the A/C compressor oil from running out.
3. Clean the mating surfaces.
4. Replace the O-ring with a new one at the relief valve, and apply a thin coat of refrigerant oil before installing it.
5. Remove the plug, and install and tighten the relief valve.
6. Charge the system.