Low Pressure Sensor / Switch: Service and Repair

REMOVAL

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

1. Disconnect and isolate the battery negative cable.

A/C Low Pressure Switch - Typical:

2. Disconnect the wire harness connector from the A/C low pressure switch.
3. Remove the A/C low pressure switch from the accumulator and remove and discard the O-ring seal.

INSTALLATION

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

1. Lubricate a new O-ring seal with clean refrigerant oil and install it onto the accumulator 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 A/C compressor in the vehicle.
2. Install the A/C low pressure switch onto the accumulator. Hand-tightened the switch securely.
3. Connect the wiring harness connector to the A/C low pressure switch.
4. Reconnect the battery negative cable.