Which vent open at what times?

Tiny
BRIAN TOAHTY
  • MEMBER
  • 2002 LINCOLN TOWN CAR
  • V8
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
I have A/C air blowing through the defrost vents and upper vents when set on max A/C or just upper vents are selected.
Tuesday, June 29th, 2021 AT 9:52 AM

1 Reply

Tiny
BMDOUBLE
  • MECHANIC
  • 1,139 POSTS
You need to verify the vacuum source (black tube) under the dash has vacuum available. If there is no vacuum there, look under the passenger side of the hood and trace the vacuum line to make sure there are no brakes, pinched line, etc.
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Tuesday, June 29th, 2021 AT 1:12 PM

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