Control Assembly: Description and Operation

Mode Selection
Mode selection is controlled by the mode switches in the heater control panel and the mode control motor. When you select a specific mode, voltage is applied through the dimming control circuit to the LED, which comes ON, indicating the mode selected. Ground is provided to the mode control motor through that mode switch. The motor then runs until the air control door reaches the proper position.

Fresh/Recirculation Selection
When you press the fresh/recirculation button, a ground signal is sent from the heater control panel to the recirculation control motor. The motor then runs until the recirculation door reaches the opposite position. When the fresh/recirculation button is in the REC position, battery voltage is applied through the dimming control circuit to the recirculate LED, and the LED comes ON.