High Pressure Safety Valve HVAC: Service and Repair

Removal
NOTE: Make sure the suction and discharge ports are plugged with caps.

Relief Valve Removal:

- Remove the three bolts, heat insulator, relief valve, and 0-ring.

NOTE: Be sure to use the right 0-rings for R-134a to avoid leakage.

CAUTION: Be careful not to spill compressor oil, and make sure there is no foreign matter in the system.


Installation
- Clean off the relief valve mating surface.
- Replace 0-ring with new one at the relief valve, and apply a thin coat of refrigerant oil (SP-1O: P/N 38899-P13-003) before installing it.

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

- Tighten the relief valve.
- Check the relief valve for leaks and cap the relief valve with the valve seal.