not getting air or heat out of vents? - Ford Powerstroke Diesel Forum
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post #1 of 20 Old 05-10-2009, 04:50 PM Thread Starter
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not getting air or heat out of vents?

well just recently my vents you can adjust quit working the defrost and floor vents work and even the little ones that blow to the side windows they work but the vents you can move and adjust don't work do you guys know what wrong with it.

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post #2 of 20 Old 05-10-2009, 04:52 PM
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sounds like a vacume line problem. check all the lines for cracks, breaks.

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post #3 of 20 Old 05-10-2009, 05:16 PM Thread Starter
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not an expert on this part of the truck at all which lines and it just quit all the sudden it wasn't gradual one day it worked next day nothing.

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post #4 of 20 Old 05-11-2009, 12:15 PM
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Check to see if the vacuum pump under the hood runs or not disconnect the line and see if it pumps. Its on the passenger side behind the battery.
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post #5 of 20 Old 05-11-2009, 12:25 PM
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Should be just the small diameter rubber hoses for the vacuum pump like afore mentioned. They have a tendency to dry rot and crack. Easy fix hopefully

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post #6 of 20 Old 05-11-2009, 04:50 PM Thread Starter
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cool i was pretty worried it was something under the dash and was not looking forward to tearing that out i will look into it tomorrow it's about time we will need the a/c alot! thanks for the help guys

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post #7 of 20 Old 05-11-2009, 08:26 PM
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When I bought my rig it was doing the same thing, so the dealership had to got under the dash to fix it. I believe a vacuum line had come off. You can get to most of the air stuff by popping out you glove box. I think the dealer pulled my radio also cuz in the process of them fixing my vent problem they removed my radio and forgot to hook the antennae lead back up.

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post #8 of 20 Old 05-20-2009, 01:58 PM
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Tap on the vacumn pump located behind the passenger side battery. My vents did the same thing ,quit working. A light tap on it got it going again. Have someone sit in the truck and turn the ignition on and off, you can hear the pump trying to cycle.
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post #9 of 20 Old 05-24-2009, 07:39 AM
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i had the same problem Thursday it was working Friday it did the same thing

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post #10 of 20 Old 05-29-2009, 04:19 AM
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Mine was the small hvac vacuum pump. Pressure switch inside it was out of adjustment. Easy fix if you are mechanical
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