Dash vents

1999 CADILLAC DEVILLE
180,000 MILES • 4.6L • V8 • FWD • AUTOMATIC
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CADILLACDAVE1
  • MEMBER
  • 1 POST
Heater or air conditioner functions properly, but blower only blows through floor vent or defroster. Wont switch to dash vents.
Jul 19, 2016 at 7:37 AM
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HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
check for a vacuum leak or vacuum motor not getting vacuum to open to proper position it can start at control or engine or a hose.
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Jul 19, 2016 at 9:26 AM