1999 Cadillac Deville locat vents

Tiny
RDEWSNAP
  • MEMBER
  • 1999 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 51,000 MILES
99 cad deville middle air vents not open. Defroster and floor are blowing air where is the box that I can open the middle vents
Sunday, May 2nd, 2010 AT 10:12 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,777 POSTS
You are dealing with a vacuum leak problem. The vent doors are actuated by vacuum. If the loss of vacuum occurrs, you can't switch direction. Check under the dash for leaks. Also, with the engine running, you may get lucky and hear a hissing sound where the leak is located.

Let me know if you have other questions, and thanks for using 2carpros. Com. As far as a box, you would need to remove the entire HVAC system from under the dash.

Joe
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Tuesday, May 4th, 2010 AT 12:23 PM

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