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



Compressor Pressure Relief Valve Replacement

Removal Procedure





1. Drain the air conditioning system. Refer to Refrigerant Recovery and Recharging (Refrigerant Recovery and Recharging) .
2. Remove the high pressure relief valve.

1. Remove the compressor relief valve (1).
2. Remove the seal ring (2).




Installation Procedure

1. Install the high pressure relief valve.

Notice: Refer to Fastener Notice (Fastener Notice) .

2. Replace the seal ring. Before installation, coat seal ring with mineral oil.

Tighten the high pressure relief valve to 10 N.m (89 lb in).

3. Evacuate and charge the air conditioning system. Refer to Refrigerant Recovery and Recharging (Refrigerant Recovery and Recharging) .