Refrigerant Pressure Sensor / Switch: Service and Repair

1. Discharge A/C system.
2. Remove retaining ring using suitable snap ring pliers, then the control valve or switch.
3. Remove and discard O-rings.
4. Coat replacement O-rings with clean refrigerant oil, then seat O-rings in proper grooves in housing.
5. Lubricate control valve or switch with clean refrigerant oil, then press into place.
6. Install retaining ring with high point of curved sides toward switch or valve housing, ensuring that ring is fully seated.
7. Evacuate and recharge system, then check for leaks.