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Because of a vaccume leak or a bad accuator for the blender door. but usally it is a cracked or disconnected vaccume hose - mostly the vac hose from the intake manifold 2 the vac T that goes inside the car.

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โˆ™ 2004-06-26 23:27:14
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Q: Why would air come out of the defroster when using the AC-heater but not from the front vents?
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