Question about 1997 Chevrolet Lumina

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A/C and heater air only comes from windshield defrost vent and floor vents.

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Flaper in vent it broke or off. switch not working.
cable broke.

Posted on Sep 07, 2009

  • jason king
    jason king Sep 11, 2009

    switch is stuck in def/floor. switch is bad

  • mat cerer
    mat cerer Dec 05, 2014

    how easy is it to fix

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Heater blows air thru floor vents and dash vents but no air thru defrost windshield vent


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Mode Door 1.
a.This door regulates air flow to either the dash vents or defrost/floor. If you have air flowing only through the vents with no defrost or floor, this door is failing. From our experience, this door is usually the first domino to fail. Not sure why, just is.
<!--[if !supportLists]-->4.Mode Door 2.
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Problem with air not coming out of vents.


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The vent flap foam lining has come loose and needs to be removed or reglued . A spray on contact adhesive works best , don't glue the flap to the vent casing.

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