High Pressure Sensor / Switch: Service and Repair

A/C High Pressure Switch Replacement

REMOVAL
1. Disconnect and isolate the battery negative cable.
2. Unplug the wire harness connector from the a/c high pressure switch, which is mounted to a fitting on the discharge line between the compressor and the condenser inlet.
3. Unscrew the a/c high pressure switch from the discharge line fitting.
4. Remove the a/c high pressure switch from the vehicle.
5. Remove the O-ring seal from the discharge line fitting and discard.

INSTALLATION
1. Lubricate a new O-ring seal with clean refrigerant oil and install it on the discharge line fitting. Use only the specified O-rings as they are made of a special material for the R-134a system. Use only refrigerant oil of the type recommended for the compressor in the vehicle. (Refer to REFRIGERANT OIL - DESCRIPTION Refrigerant).
2. Install and tighten the high pressure cut-off switch on the discharge line fitting. The switch should be hand-tightened onto the discharge line fitting
3. Plug the wire harness connector into the high pressure cut off switch.
4. Connect the battery negative cable.