Air Door Actuator / Motor: Description and Operation

SYSTEM OPERATION
Vacuum Control System
The Neon uses vacuum to operate only the recirculation door. All other controls are cable. When vacuum is supplied to the actuator, the door moves to the Recirculation position. The actuator is spring loaded so the door moves to the Outside Air position when there is no vacuum supplied. The operation of the door can be viewed by removing the blower motor and looking up into the unit inlet.

Normally vacuum is supplied to the actuator by placing the Circulation control knob in the Recirculation position. If the Mode control is at or near the Defrost position, vacuum will not be applied to the actuator regardless of the position of the Circulation control knob. This is to prevent window fogging.