My heater works fine but it won't switch from the defrost vents position. What could be wrong with it.
Dec 27, 2010 at 11:48 AM
heater
LITALIEN1001
- MEMBER
- 1 POST
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It sounds like you have a vacuum leak. Air flow is directed by vent doors in the HVAC system. The doors are actuated by engine vacuum. If there is a leak, the defroster is the default setting. Check under the dash for leaks. With the engine running, you may get lucky and hear a hissing sound from the leak.
Jan 18, 2011 at 11:39 AM
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