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#1
04-07-2005, 08:14 AM
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Defrost vents always on.
Why is my defrost vents always blowing air? No mater which vent position I have the air turned to, the defrost vents are blowing the most air. also when I step on the gas the air stops blowing completely.
All help is greatly appreciated. 
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#2
04-08-2005, 10:27 AM
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Re: Defrost vents always on.
the vent selection is vacume controled, chances are that you have a bad vac line or connection someplace. could also be a bad vac switch or motor. also, there is a TSB about the check valve that is between the engine and the switch, I'll see if I can find it, basically what it envolves is puting in a larger/better check valve.
__________________
when all else fails, get a bigger hammer.  Vehicles: 2005 suburban 1500 4x4 all stock, ex-fire department truck. 1987 Grand Wagoneer
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#4
04-08-2005, 03:09 PM
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Re: Defrost vents always on.
TSB= Technical Service Bulliten
it's what dodge sends out to the dealerships so that the techs know how to diagnose and fix a particular problem. all TSBs are submitted to the NHTSA, here's theire web address, http://www.nhtsa.dot.gov/ I belive they have a search feature that allowes you to search for TSBs for your particular vehicle.
__________________
when all else fails, get a bigger hammer. Vehicles: 2005 suburban 1500 4x4 all stock, ex-fire department truck. 1987 Grand Wagoneer
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