Control System Logic
WARNING: This page is about a different car, the 2016 Ford Transit-350 HD, 2016 Ford Transit-350, 2016 Ford Transit-250, and 2016 Ford Transit-150. However, it is still accessible from the selected car via links, so may be relevant.
Set the rear fan speed control rotary switch to any speed other than 0 to operate the system. The temperature door actuator is controlled by the temperature and air distribution control rotary switch, and RHVAC control module internal logic uses the temperature and air distribution control rotary switch position to control the correct blower motor.