Fresh/Recirculated Air Selector Lever
WARNING: This page is about a different car, the 1996 Dodge Stealth and 1995 Dodge Stealth. However, it is still accessible from the selected car via links, so may be relevant.
This lever is used to select source of airflow. With lever at fresh air setting, outside air is allowed to enter and/or pass through heater. With lever at recirculated air setting, inside air is recirculated through passenger compartment.