Refrigerant Pressure Sensor / Switch: Testing and Inspection

Repair Procedure:

Replace the high pressure switch along with the receiver/dryer if the fusible plug is found open.

The following items should also be checked for proper function as the system should not normally operate at these high pressures:

- Auxiliary Fan
- 108°C Coolant Temperature Switch (M Series Cars Only)
- 150°C Compressor Temperature Switch (models so equipped)
- Operating pressures - blockage or restriction in system