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99 Exp HVAC issues

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Old Oct 28, 2011 | 08:34 AM
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Chief8000
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99 Exp HVAC issues

I have 2 issues I am currently having with my expedition.

1. No matter what setting the heat/ac is on you either have Hot or Cold air there is no in between. When the temp is scrolled all the way to cold it is cold, but as soon as you move it one step down from cold it goes hot. Any ideas what is causing this and how to fix?

2. When the heat/ac is on there is a clunking noise that comes from under the dash like right were the console meets the dash and the rear vents on the back of the console only blow air out some times even when the controls are set to correctly.

any help on these two issues would be greatly appreciated. Thanks
 
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Old Oct 28, 2011 | 10:01 AM
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Turx
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From: SWPA
Sounds like a "blend door" problem. Any vacuum lines hanging down or possibly dried out, brittle?
 
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