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No Heat at Floor

Tiny
GAAYERS
  • MEMBER
  • 2000 OLDSMOBILE BRAVADA
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 130,000 MILES
When I turn the switch on the dash to blow heat to the floor, it comes out the defrost/windshield. When I turn it to defrost, it is fine; when I turn it to vents, it is fine. Just will not go to floor.
Saturday, October 1st, 2016 AT 12:24 PM

2 Replies

Tiny
GAAYERS
  • MEMBER
  • 4 POSTS
I should have noted that I tried the re-calibration method found at the following link, but to no avail. Note that I removed the smaller ten amp AC fuse under the hood. There was a larger one, but I did not remove it.

http://sparkys-answers.com/2011/08/hvac-actuator-recalibration-procedure.html
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Saturday, October 1st, 2016 AT 12:28 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You have a vacuum leak see picture. Check the items 15 and 16 for no vacuum. It can be a leak at engine, or control head. Or a vacuum motor is bad.
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Saturday, October 1st, 2016 AT 12:53 PM

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