No Heat at Floor

2000 OLDSMOBILE BRAVADA
130,000 MILES • 6 CYL • AWD • AUTOMATIC
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GAAYERS
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  • 4 POSTS
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.
Oct 1, 2016 at 12:24 PM
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GAAYERS
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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
Oct 1, 2016 at 12:28 PM
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HMAC300
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 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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Oct 1, 2016 at 12:53 PM
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