no air flow to defrost vent

2003 OLDSMOBILE SILHOUETTE
170,000 MILES • 3.4L • V6 • 2WD • AUTOMATIC
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DKELLOGG1
  • MEMBER
  • 1 POST
good air flow (heat) dash but not sure about foot (floor) "no air flow to defrost vent".
Feb 21, 2018 at 11:01 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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ASEMASTER6371
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 52,796 POSTS
Good afternoon.

There is a mode door that controls air flow to the floor and defrost. It is under the right side of the dash. Common failure for this failure.
Picture attached. You can get the replacement at any parts store.

Roy
Feb 21, 2018 at 11:46 AM
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