A/C Pressure Switch

A/C Refrigerant System Component Description

A/C Pressure Switch





• Depending on engine type, refrigerant systems have either an A/C Pressure Switch (F129) or High Pressure Sensor (G65) installed. Refer to appropriate wiring diagram.

A/C Pressure Switch (F129) has three functions:

• Switches the A/C Clutch (N25) off when excessive refrigerant circuit pressure is present (e.g.: insufficient air flow over condenser or when overcharged).

• Switches the A/C Clutch (N25) off when insufficient refrigerant circuit pressure is present (e.g.: when refrigerant has leaked out)

• Switches on the second speed Coolant Fan (V7) when refrigerant circuit pressure increases.