Question about 1997 Ford Windstar

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Problem: Ford Windstar SE, 3.8L V6, 1999, front seat heat/defrost is alway cold with engine warm and heater turned on. Symptoms: 1) When (engine is warm and) front seat heat temp slider is moved from full cold to anything with hot air mix to full hot, you can hear a door flapping back and forth under the dash and air delivered remains full cold. 2) Door flapping problem is with any heater fan speed and/or defrost/heat/dash air setting when any hot air mixed via temp selector (does not happen with full cold setting in any node). 3) Rear seat heat works fine, although front seat heat must be engaged (defrost/heat/dash air on) for rear heat to operate (this is by design presumably), so engine hot water is getting to heat exchanger under dash.

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Problem is most likely in the electronic blend door motor or the door itself has broken.
To access the electronic temperature blend door actuator remove cassette storage box or center shelf unit, if equipped.
Remove instrument panel ash receptacle by depressing service lever. Disconnect electrical harness connector from A/C electronic door actuator motor.
Remove three retaining screws.
Carefully pull A/C electronic door actuator motor outward and off A/C evaporator housing assembly.Make sure the door it self is not cracked where the actuator hooks to it and that it will move.
Here ia a link to a pick of what you are looking at.

http://i253.photobucket.com/albums/hh43/chuck943/L9819A.gif

Posted on Mar 10, 2009

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I would think the door you hear flapping is the door that controls the airflow across the heater coil - and the fan keeps blowing the door closed, preventing the airflow from going across the heating coil. I don't know whether this vehicle is vacum controlled or cable controlled - so either it's a disconnected cable, or a leaking vacum line.

Posted on Mar 10, 2009

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SOURCE: Ford Windstar SE, 3.8L V6, 1999, front seat heat/defrost is cold

the blendor actuators strip out the gear inside the actuator cases on these all the time. replace the actuator.

Posted on Mar 19, 2009

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