High Pressure Sensor / Switch: Service and Repair

REMOVAL

NOTE: It is not necessary to discharge the refrigerant system to replace the A/C high pressure switch.

1. Disconnect and isolate the battery negative cable.

A/C High Pressure Switch - Typical:

2. Disconnect the wire harness connector from the A/C high pressure switch .
3. Remove the A/C high pressure switch from the discharge line fitting.
4. Remove the O-ring seal from the discharge line fitting and discard.

INSTALLATION

NOTE: Replace the O-ring seal before installing the A/C high pressure switch.

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 refrigerant system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
2. Install and tighten the A/C high pressure switch onto the discharge line fitting. The switch should be hand-tightened securely onto the discharge line fitting.
3. Connect the wire harness connector into the A/C high pressure switch.
4. Reconnect the battery negative cable.