High Pressure Safety Valve HVAC: Service and Repair

Compressor Pressure Relief Valve Replacement

Special Tools

J 39400-A Halogen Leak Detector

Removal Procedure

1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging Refrigerant Recovery and Recharging.

Note: Cap or tape the open A/C components immediately to prevent system contamination.

2. Remove the air conditioning compressor. Refer to Air Conditioning Compressor Replacement (LZE, LZ4, LZ9) Removal and ReplacementAir Conditioning Compressor Replacement (LY7) Removal and Replacement.




3. Remove the high pressure relief valve.

Installation Procedure

1. Remove the cap or tape from the A/C compressor.





Caution: Refer to Fastener Caution Fastener Caution.

2. Install the high pressure relief valve.

Tighten the valve to 8 Nm (70 lb in).

3. Install the air conditioning compressor. Refer to Air Conditioning Compressor Replacement (LZE, LZ4, LZ9) Removal and ReplacementAir Conditioning Compressor Replacement (LY7) Removal and Replacement.
4. Evacuate and recharge the refrigerant system. Refer to Refrigerant Recovery and Recharging Refrigerant Recovery and Recharging.
5. Leak test the fittings of the component using J 39400-A .