Vacuum Motor
Receives vacuum supply from transducer and produces all mechanical motion within the programmer. It positions the vacuum motor mechanism which actuates a rotary shaft that drives the air-mix door link, moves the blower circuit board wiper arm, moves the vacuum valve operating arm and controls the feedback potentiometer. The vacuum motor mechanism is spring loaded so that with no vacuum it is fully extended out of the vacuum motor (Max A/C position). When approximately 8" of vacuum is applied to the motor, the mechanism is pulled all the way into the vacuum motor (Max Heat position).