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From vents to defroster vents From vents to defroster vents
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  #1  
Old 10-02-2009, 11:41 PM
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Join Date: Sep 2002
Location: Seffner,Florida
Vehicle: 2007 Ford F150
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Question From vents to defroster vents
I run my a/c on max,blower motor on #4.Sometimes when I accelerate hard the air goes from the vents to the defroster vents.When I let off the gas it goes back to the vents.Any ideas?

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Old 10-03-2009, 01:19 AM
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Location: FT Hood TX
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My wifes jeep does the same thing please let me know if you figure it out
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  #3  
Old 10-03-2009, 09:24 PM
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Join Date: Feb 2001
Location: Guyton, GA USA
Vehicle: 2006 Ford F250 4X4
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Most likely a cracked/broken vacuum line under the hood. Look for a single black line running along the right side of the engine compartment, along the itop portion of the fender.
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