High Pressure Safety Valve HVAC: Service and Repair

Compressor Pressure Relief Valve Replacement

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging. Refrigerant Recovery and Recharging
2. Raise and support the vehicle. Refer to Vehicle Lifting.




3. Remove the pressure relief valve from the compressor.
4. Remove and discard the O-ring from the pressure relief valve.

Installation Procedure

Important: Lubricate the new O-ring prior to installation on the compressor hose.




1. Lightly coat the new O-ring with mineral base 525 viscosity refrigerant oil.
2. Install the new O-ring to the pressure relief valve.

Notice: Refer to Fastener Notice.

3. Install the pressure relief valve to the compressor.

Tighten the pressure relief valve to 8.8 N.m (78 lb in).

4. Lower the vehicle. Refer to Vehicle Lifting.
5. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging. Refrigerant Recovery and Recharging
6. Test the affected A/C joint for leaks using J 39400-A.