Temperature Selector
WARNING: This page is about a different car, the 1994 Eagle Vision, 1994 Dodge Intrepid, 1994 Chrysler New Yorker, 1994 Chrysler LHS, and 1994 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.
Temperature selector rotates a potentiometer (POT). A pulse voltage signal is sent to the blend-air door actuator. Changes in voltage across a resistor changes door position through full range of hot and cold.