Recirculation Control
WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
The recirculation control determines the air intake through the recirculation actuator. When the recirculation switch is pressed, a signal is sent from the switch to the recirculation actuator through the recirculation signal circuit. When the actuator receives the signal, the actuator moves into the recirculation mode. This circulates air from inside the vehicle instead of fresh air from the outside. Recirculation is available in any mode and can be selected with the blower motor in either the ON or OFF position.