Sable V6-183 3.0L DOHC VIN S MFI (1997)
Air Door Actuator / Motor: Description and Operation
Blend Door Motor
The A/C electronic blend door actuator is located on the rear of the A/C evaporator housing assembly.
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Its function is to move the A/C air temperature control door on command from the remote climate control module.
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The A/C electronic blend door actuator contains a reversible electric motor and a potentiometer. The potentiometer wiper is connected to the
actuator output shaft and moves with the output shaft to indicate the position of the A/C air temperature control door.
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A five volt signal is applied to the ends of the potentiometer. The voltage available at the wiper indicates the position of the potentiometer. The
expressed value of the actuator wiper voltage is sent to the control module and matched with the wiper voltage of the module potentiometer. The
printed circuit board then drives the actuator motor in whichever direction is necessary to make the actuator wiper voltage agree with the remote
climate control module wiper voltage.
