Recirculation Mode

When the recirculation (RECIRC) switch is pressed, a signal is sent from the HVAC control module to the recirculation actuator through the recirculation door control circuit. When the logic inside the actuator receives the signal, the recirculation actuator moves into the recirculation mode. This brings air from inside the vehicle instead of air from the outside.

The rear fuse block provides power to the recirculation actuator through the ignition 3 voltage circuit. Ground is provided by the low reference circuit, the HVAC control module and ground circuits.

The recirculation actuator is a DC motor. 0 volts drives the actuator in one direction while 12 volts moves the actuator in the opposite direction. A 12 volt signal is sent out over the recirculation door control circuit, from the HVAC control module, to the recirculation actuator. When the recirculation setting is selected, the logic inside the actuator is used to determine the recirculation door position signals value. The motor moves the recirculation door to the desired position.

Recirculation is available in all modes except OFF or FRONT DEFROST. When the recirculation switch is pressed and recirculation is not available, the recirculation LED will flash 3 times to remind the driver that recirculation is not available. When servicing the actuators, make sure you use the correct service part number. There are specific parts for the left and right side of the HVAC module. Using the wrong part will effect recirculation operation.