Controls - Rear: Control-A/C-Heater: Operation
WARNING: This page is about a different car, the 2005 Dodge Durango. However, it is still accessible from the selected car via links, so may be relevant.
With the rear A/C-heater control active, temperature selection dictates the air distribution mode (floor or overhead air) of the rear heater-A/C system. A cool temperature setting directs flow to the overhead outlets and a warm temperature setting to the floor.
The rear A/C-heater control is diagnosed using a scan tool. Refer to HVAC - ELECTRICAL DIAGNOSTICS article for more information.