1996 Pontiac Bonneville No Dash Vents

1996 PONTIAC BONNEVILLE
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JKFARMER45
  • MEMBER
  • 2 POSTS
Hello guys, I have a 1996 Bonneville and the heat and a/c only blow out in defrost vents and the floor vents, but not inon the dash vents. What could be the problem ? Any help would be appreceiated.....Jim
Feb 19, 2007 at 2:43 PM
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CHEVY22
  • ✓Experienced Mechanic
  • 1,375 POSTS
hi jim the temp control warm and cold control works vacuum operated belnd door motors under the dash, you can start by doing a simple test, turn the key on to run with the door closed and move the temp control from cold to warm and see if you hear the belnd doors open or close
Feb 19, 2007 at 11:04 PM
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JKFARMER45
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Hey, I thank you very much for such a quick responce. However the air does change from hot to cold but, the air flow does not come out the a/c vents like it should.It only comes out at top of dash and floorboard. Thanks for your help very much.By the way I have 23 years of paint and body experience so if I can help you guys in that field in any way please feel free to write. Thanks again jkfarmer862500@yahoo.com
Feb 20, 2007 at 1:16 AM
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CHEVY22
  • ✓Experienced Mechanic
  • 1,375 POSTS
there are only a few things to look at then , the belnd doors and motors ,,, or vacuum leaks

thanks
Feb 20, 2007 at 2:19 AM

Suggested Repair

Check the vacuum-operated blend door motors under the dash and look for vacuum leaks. With the key on and the door closed, move the temperature control and listen for the doors operating.

Conversation Summary

The owner of a 1996 Pontiac Bonneville reported that heat and A/C air comes only from the defrost and floor vents, not the dash vents. Temperature still changes from hot to cold. The expert advised checking the blend doors and motors or vacuum leaks.

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