Blend Switch (Single Zone)
WARNING: This page is about a different car, the 2002 Dodge Grand Caravan, 2002 Dodge Caravan, 2002 Chrysler Voyager, and 2002 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
The single rotary Blend Switch has multiple detents to control the full range of temperature that the system can produce in any mode. Rotating the switch results in the A/C-Heater Control Module signaling the actuator to move the blend door. All door positions are determined relative to the number of commutator pulses required to provide full travel of the door. On command, the A/C-Heater Control Module runs the actuator for the number of pulses corresponding to the desired door position.