Defrost doors stuck in the defroster position?

Tiny
CHUCK BARTA
  • MEMBER
  • 1998 BUICK PARK AVENUE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 70,000 MILES
A/C fan air blows through defrost vents only. Fuses checked okay, Module replaced. No change. Any ideas?
Wednesday, August 31st, 2022 AT 7:47 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
If all fuses are okay, this leaves the HVAC programmer which must be recalibrated. Here is the location of the unit and how to set it up once replaced in the diagrams below. Check out the diagrams (below). Please let us know what happens.
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Wednesday, August 31st, 2022 AT 5:18 PM

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