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A/C High Pressure Switch

The A/C high pressure switch is used for additional A/C system pressure control. Switch is either dual function for 2-speed fan control applications or single function for all other applications. For fan control, the normally open pressure contacts close at a predetermined A/C pressure. This grounds the ACPSW circuit input to the PCM. The PCM will then turn on the high speed fan to help reduce A/C pressure.