Recirculation Switch
WARNING: This page is about a different car, the 2001 Isuzu VehiCROSS. However, it is still accessible from the selected car via links, so may be relevant.
When recirculation switch is depressed LED indicator will illuminate, indicating air recirculation mode is active. When recirculation switch is depressed again, LED will no longer be illuminated and outside air (fresh) is drawn into passenger compartment. When either defrost button is depressed, system will default to outside (fresh) air source. Depressing recirculation switch will override defrost default setting and air will be recirculated during defrost operation.