Sable V6-183 3.0L DOHC VIN S MFI (1997)
Air Door Actuator / Motor: Description and Operation
Air Door Actuator
With Electronic Automatic Temperature Control
The vacuum control motors :
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are located on the A/C evaporator housing, A/C recirculation air duct and heater air plenum chamber.
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direct system airflow to the vehicle interior as determined by the remote climate control module or manual override.
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The five-passenger seating configuration has an additional vacuum control motor mounted on the heater air plenum chamber to control airflow to
the rear seat A/C register.
With Manual A/C-Heater
VACUUM CONTROL MOTORS
The vacuum control motors direct system airflow to the different outlets. There are two types of vacuum control motors used in the System:
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single-diaphragm for air inlet and windshield defroster door operation
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double-diaphragm for air damper door operation Single-diaphragm motors have two positions:
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shaft extended with no vacuum applied
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shaft retracted with vacuum applied
Double-diaphragm motors have three positions:
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shaft fully extended with no vacuum applied to either port
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shaft halfway extended with vacuum applied to only one port
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shaft fully retracted with vacuum applied to both ports
