Mechanics

COLD AIR FROM DEFROSTER VENTS

2000 Lincoln Town Car

Heater problem
2000 Lincoln Town Car V8 Two Wheel Drive Automatic 30,000 miles

Climate control seems to work fine until I have driven the car for 1-2 hours. Then cold air comes from the defroster vent. I can set the heat to blow on the feet. I got the info for the climate control self diagnostic test (push the 2 buttons at the same time and then the auto button) I got no codes either trying it when the system is working or when it was blowing cold air on a trip last week. The little lite moves around until every thing is lit up.
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Wbdk
December 18, 2007.




Could be a vacuum source problem. Check under the hood where the feed comes through the firewall. There should be a check valve and a resevoir on the vacuum line for the interior. Need to be sure the resevoir and the check valve are working properly and arent bleeding down vacuum

Tiny
Jack42
Dec 18, 2007.


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