Question about 2005 Ford F 250 Super Duty

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The fan is blowing out the defroster and will not change to vent

Won't change over to blow out vents or floor

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  • charlesjlitt Jan 01, 2009

    yes 6.0l

  • charlesjlitt Jan 01, 2009

    ok found it. it was on there but i took it off and made sure it was on there tight, but its still blowing out the defroster, any other suggestions

  • David Robinson May 11, 2010

    Hello, lets see if I can help you.

    Is this a diesel engine?


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  • 140 Answers

Ok. Under the hood on the passenger side next to the turbocharger and behind the transmission dipstick and oil fill tube is a round vacuum valve about 2 inches in diameter.It should have a small gray vacuum hose going to it. It probably fell off. Check that first and let me know what happens. Good luck.

Posted on Jan 01, 2009

  • David Robinson Jan 01, 2009

    My F-250 did the same thing. With the engine off and hood up, turn the key on. Is the vacuum pump on the drivers side running? It runs for a couple of seconds. If not check the fuses first. If that is ok then your vent door is sticking. Turn your heater on but, have the fan on low. Wait for a minute or so and see if it blows on the floor. Sometimes if the blower is on high the damper can't move to change where the air should go. Let me know what you find.


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