Condenser Fan: Description and Operation
A/C CONDENSER FANFan Activation
With the ignition switch in the "ON" position, system voltage is applied to the dual pressure switch through the IG Fuse. The dual pressure switch remains closed as long as refrigerant pressure is between 207 kPa (30 psi) and 2641 kPa (388 psi). With the dual pressure switch closed, voltage is applied to the coil side of the A/C (Compressor Clutch) Relay.
Switching Fan Off
The A/C (Compressor Clutch) Relay is energized when the A/C amplifier grounds the coil of the relay. With the A/C (Compressor Clutch) Relay energized, voltage is applied through the A/C Fuse and the closed contacts of the A/C (Compressor Clutch) Relay to the coil of the A/C (Condenser Fan) Relay. Since the A/C (Condenser Fan) Relay is permanently grounded at G104, the relay energizes, the contacts close, and voltage is applied to the A/C condenser fan motor. Because the A/C condenser fan motor is permanently grounded at G104, the fan operates as soon as voltage is applied.