A/C High Pressure Switch Replacement

WARNING: THE REFRIGERANT MUST BE REMOVED FROM THE SYSTEM BEFORE REMOVING THE A/C HIGH PRESSURE SWITCH.

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

A/C High Pressure Switch - Typical:

4. Disconnect the engine wire harness connector from the A/C high pressure switch on the A/C compressor back cover.
5. Using snap ring pliers, remove the internal snap ring that secures the A/C high pressure switch to the port in the compressor back cover.
6. Pull the A/C high pressure 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 A/C high pressure switch and discard.

INSTALLATION
1. Clean any foreign matter from the switch mounting bore.
2. Install the A/C high pressure 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 A/C compressor in the vehicle.
3. Remove the tape or plug from the switch port on the compressor back cover.
4. Insert the A/C high pressure switch into the port on the compressor back cover.
5. Using snap ring pliers, install the internal snap ring that secures the A/C high pressure switch to the port in the compressor back cover.
6. Connect the wire harness connector to the A/C high pressure switch.
7. Lower the vehicle.
8. Reconnect the battery negative cable.
9. Evacuate the refrigerant system.
10. Charge the refrigerant system.