Question about 1997 Ford Thunderbird LX

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AC/heat/defrost functions don't work

The AC, heat, and defrost doesn't seem to produce any flow into the interior of the car. The AC will occasionally work when if I hit a bump in the road, not sure if the same happens for heat/defrost. The fan appears to be working fine, when the car is parked and running at least. When I turn the air off the fan stops, and starts again when I turn it back on.

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There is a blend door and a selector door in the HVAC system. These are run by vacuum or servo motors. Sounds like this little motor is your problem. Hope this helps you.

Posted on Jan 19, 2009

  • chris tyrrell Jan 19, 2009

    there is a blend door and a selector door in the HVAC system. These are run by vacuum or servo motors. Sounds like this little motor is your problem. Hope this helps you.

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