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Air conditioning duct closeing

Tiny
JIGGN
  • MEMBER
  • CHEVROLET TRUCK
I have a 1997 chevy 3500 daully w/ a 6.5L turbo desiel w/ 85,000 miles. The problem I am having is when I am driving down the road w/ the air on after a while, approximatley 40 mins. As I last noticed the air will still sound like it is blowing like mad but noting is coming out of any vents. The only way to get the air to start coming out the vents again is to shut the truck off for about 10-15 mins. In my mind I vision a air duct damper shutting and freezing up and when I shut it off I feel as it thaws out to let it operate again. Thats just my thought. Any info would be greatly appreciated as I have had this truck to the dealership here three times in the last two years and they havent got a clue.
thanks dennis
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Sunday, July 22nd, 2007 AT 6:53 PM

3 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Does the air blow out of the defroster vents?
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Monday, July 23rd, 2007 AT 7:51 AM
Tiny
JIGGN
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Thanks for the quick response, no air does not come out the defrosters either. I can hear the air moving but it doesnt come out any vents. Thanks again dennis
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Monday, July 23rd, 2007 AT 10:51 AM
Tiny
2CARPRO JACK
  • MECHANIC
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I would try removing the blower motor and look for something blocking the ducts. I cant think of any one door that can block all air coming out of the vents
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Tuesday, July 24th, 2007 AT 7:57 AM

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