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 negative battery 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 A/C discharge line and remove and discard the O-ring seal.

INSTALLATION

NOTE: Use only the specified O-ring as it is made of special material for R-134a. Use only refrigerant oil of the type required for the A/C compressor.

1. Lubricate a new rubber O-ring seal with clean refrigerant oil and install it on the A/C high pressure switch fitting.
2. Install the A/C high pressure switch onto the A/C discharge line. Hand-tightened the switch securely.
3. Connect the wire harness connector to the A/C high pressure switch.
4. Reconnect the negative battery cable.