High Pressure Sensor / Switch: Service and Repair

WARNING: THE REFRIGERANT MUST BE REMOVED FROM THE SYSTEM BEFORE REMOVING THE HIGH PRESSURE CUT OUT SWITCH.

REMOVAL
1. Recover refrigerant from A/C system.
2. Disconnect and isolate the battery negative cable.
3. Raise and support the vehicle.

High Pressure Cut Out Switch:

4. Disconnect the engine wire harness connector from the high pressure cut out switch on the compressor back cover.
5. Using snap ring pliers, remove the internal snap ring that secures the high pressure cut out switch to the switch port in the compressor back cover.
6. Pull the high pressure cut out switch out of the compressor back cover.
7. Install a plug in or tape over the opened switch port on the compressor back cover.
8. Remove the rubber O-ring seal from the high pressure cut out switch and discard.

INSTALLATION
1. Clean any foreign matter from the switch mounting bore
2. Install the high pressure cutout switch with a new O-ring. 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.
3. Remove the tape or plug from the switch port on the compressor back cover.
4. Insert the high pressure cut out switch into the switch port on the compressor back cover.
5. Reconnect the engine wire harness connector to the high pressure cut out switch on the compressor back cover.
6. Lower the vehicle.
7. Reconnect the battery negative cable.
8. Evacuate the refrigerant system.
9. Recharge the A/C system.