Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

High Pressure Safety Valve HVAC: Service and Repair




A/C Compressor Relief Valve Replacement

1. Recover the refrigerant with a recovery/recycling/charging station A/C Refrigerant Recovery.

2. Remove the front splash shield Splash Shield Replacement.

3. Remove the relief valve (A) and the O-ring (B). Plug the opening to keep moisture and foreign material from entering the system and the A/C compressor oil from running out.





4. Clean the mating surfaces.

5. Replace the O-ring with a new one at the relief valve, and apply a thin coat of refrigerant oil before installing it.

6. Remove the plug, and install and tighten the relief valve.

7. Charge the system A/C System Charging.