High Pressure Safety Valve HVAC: Service and Repair

1. Remove the relief valve and the O-ring.

NOTE:
- Do not let the compressor oil run out.
- Make sure that no foreign matter enters the system.

2. Clean the mating surfaces.
3. Replace the O-ring with a new one at the relief valve, and apply a thin coat of refrigerant oil (ND-OIL 8) before installing it.

NOTE:
- To avoid contamination, do not return the oil to the container once dispensed, and never mix it with other refrigerant oils.
- Immediately after using the oil, replace the cap on the container, and seat it to avoid moisture absorption.
- Do not spill the refrigerant oil on the vehicle; if may damage the paint; if the refrigerant oil contacts the paint, wash it off immediately.

4. Install and tighten the relief valve.
5. Charge the system and test its performance.