Circuit Operation

The circuit consists of the pressure switch, A/C switch, electric thermostat, blower motor, fan switch, magnetic clutch of the A/C compressor, blower resistor and relay.

The start and stop of the A/C is controlled by turning the A/C switch ON and OFF. The electric thermostat and the PCM can stop the operation of the A/C temporarily by disconnecting the magnetic clutch under the predetermined conditions to adjust the room temperature, preventing the abnormal rise of the engine coolant and reduce the engine load while the A/C is in operation.