Explorer Sport Trac 4WD V6-4.0L VIN K Flex Fuel (2004)
Air Door Actuator / Motor: Description and Operation
VACUUM CONTROL MOTORS
The vacuum control motors:
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are located on the A/C evaporator housing, A/C recirculating air duct and heater air plenum chamber.
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direct system airflow to the vehicle interior as determined by the function selector switch.