My heater on my 2002 Ford Expedition blows out the defrost vents but not my front vents. What would cause this?
Dec 29, 2010 at 2:03 PM
Heater Problems
BEACHIN2009
- MEMBER
- 1 POST
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Check for vacuum leaks under the dash. The vent doors are actuated by vacuum. If there is a leak, this will happen. When checking, start the engine and listen. If you are lucky, you may hear a hissing sound where the leak is located. NOTE: Make sure to do it in a well ventilated area.
Feb 7, 2011 at 11:52 AM
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