Low Pressure Sensor / Switch: Service and Repair

A/C LOW PRESSURE SWITCH

REMOVAL

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

1. Disconnect and isolate the battery negative cable.
2. Disconnect the connector for the A/C low pressure switch from the top connector on the accumulator.
3. Unscrew the A/C low pressure switch from the fitting on the top of the accumulator.
4. Remove the O-ring seal from the accumulator and discard.

INSTALLATION

NOTE: Replace the O-ring seal before installing the low pressure clutch cycling switch

1. Lubricate the new O-ring seal with clean refrigerant oil and install it on the accumulator fitting. Use only refrigerant oil of the type recommended for the compressor in the vehicle.
2. Install and tighten the A/C low pressure cycling switch onto the accumulator fitting. The switch should be hand-tightened onto the accumulator fitting.
3. Reconnect the wiring harness connector to the A/C low pressure switch.
4. Reconnect the battery negative cable.