F 450 4WD Super Duty V10-6.8L VIN D (2004)
Air Door Actuator / Motor: Description and Operation
Manual Climate Control
VACUUM CONTROL MOTORS
The two vacuum control motors:
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are actuated by vacuum from the function selector switch.
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position the plenum doors to direct system airflow to the vehicle's interior as determined by the function selector switch setting.
TEMPERATURE BLEND DOOR ACTUATOR
The temperature blend door actuator:
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is located on the top of the plenum chamber behind the glove compartment.
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moves the temperature blend door on command from the temperature control switch.