A/C Control Module
WARNING: This page is about a different car, the 2002 Dodge Intrepid, 2002 Chrysler Intrepid, 2002 Chrysler Concorde, and 2002 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.
If any repairs were made to heating and A/C system, disconnect negative battery cable or use scan tool to recalibrate HVAC doors on both the ATC and MTC systems.