Interior air flow

2003 MERCURY SABLE
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THORNTOT
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I have no air coming out of my dash vents in response to button selections. Air only blows from defrost and/or floor. Air is plenty cold/hot, just doesn't blow from the dash vents when 'auto' is selected or if I choose dash air. Is some door stuck? Something I can spray WD40 on?
Jun 5, 2011 at 1:23 AM
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MHPAUTOS
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Sounds like you have a vacuum line off or a vacuum leak, check around the controller and the blend doors under the dash, access may be fairly restricted, if in doubt get a mechanic to test the system, i will look at the systematic and if there is any obvious point that may be a concern i will post it soon.
Jun 5, 2011 at 2:27 AM