High Pressure Safety Valve HVAC: Service and Repair

AIR CONDITIONING (A/C) PRESSURE RELIEF VALVE







Removal and Installation

NOTE: Installation of a new suction accumulator is not required when repairing the A/C system, except when there is physical evidence of contamination from a failed A/C compressor or damage to the suction accumulator.

Vehicles with 4.6L or 5.4L
1. With the vehicle in NEUTRAL, position it on a hoist.

All vehicles
2. Recover the refrigerant.
3. Remove the A/C compressor pressure relief valve and O-ring seal.
- To install, tighten to 10 Nm (89 lb-in).

4. NOTE: A new O-ring seal will already be installed on the new A/C pressure relief valve service part.

To install, reverse the removal procedure.
- Lubricate the refrigerant system with the correct amount of clean PAG oil.

5. Evacuate, leak test and charge the refrigerant system.