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Author Topic: Lack of air flow from defroster vents  (Read 1397 times)

Offline conductr

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Lack of air flow from defroster vents
« on: January 10, 2011, 06:31:19 am »
I seem to have a lack of airflow from the defroster vents.  Fan runs fine, and there is great air flow from all the other positions.  Any suggestions ?
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Offline Kilch123

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Re: Lack of air flow from defroster vents
« Reply #1 on: January 10, 2011, 06:43:42 am »
Hi and welcome to the forum!

That sounds like a blend door problem

It would help us to help you if you let us know what vehicle you have
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Offline conductr

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Re: Lack of air flow from defroster vents
« Reply #2 on: January 10, 2011, 03:08:55 pm »
Sorry about that, I have a 05 1/2 ton 4x4 hemi, SLT package, 38000 miles, It used to blow great thru the defrost vent on top....now fan runs great but little air flow thru the top vents ???
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Offline bikemancs

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Re: Lack of air flow from defroster vents
« Reply #3 on: January 10, 2011, 03:11:59 pm »
any vibrations or odd noises?
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Offline RacingZR

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Re: Lack of air flow from defroster vents
« Reply #4 on: January 10, 2011, 04:38:52 pm »
www.heatertreater.net.  They'll help you diagnose it and offer a great fix for the doors that you can do yourself and not avoid removing the entire dash.  Sounds like a blend door or mode door 1 but need some more information.
Is the air the saem temp on both sides of the dash?  Equal flow on both sides?  Does recirc work properly?
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