A/C Head Pressure Switch

A/C Head Pressure Switch Circuit:

Purpose:
The A/C head pressure switch provides the PCM with information regarding A/C high side pressure.

Operation:
The switch opens at 210 psi (1448 kPa) +/- 10. When the head pressure switch interrupts the ground at PCM CKT 380, the left fan should run at high speed.

Location:
The A/C head pressure switch is located in the A/C compressor.