Air compressor ice cold but blowing really hot air through car vents

Asked by May 19, 2017 at 11:57 PM about the Ford Grand Marquis

Question type: Maintenance & Repair

1999 grand marquis air compressor ice cold but
blows nothing but heat out the vents what could it
be?  

2 Answers

Listen VERY CAREFULLY while you move the lever from off, to floor, to defrost, to cabin. You should be able to hear the vent door move if it is working correctly, going from one input and output to the other.

405

Temp blend door or motor not working, u may also have a vacuum leak or bad blend switch

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