Question about 2007 Ford F-250 Super Duty Lariat

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F250 superduty a/c problem

After starting, the air is coming out of the windshield vents for several minutes even though it is set to come out of the other vents. It slowly
changes to the selected vent after several minutes. The problem seems to be getting worse

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Sounds like a vacuum problem, you didnt specify gas or diesel, on gas engines the hvac doors work off of engine vacuum, on diesels they have a seperate vacuum pump on the passenger side fenderwell, another place damage to the vacuum line can occur is under the glove box near the passenger kick panel, it could also be a control head problem. -Jared

Posted on Nov 14, 2008

  • Jared Hanley Nov 14, 2008

    Oh and it could also be an actuator leaking, but either way what is happening is it is defaulting to the defrost setting as designed.

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