1999 Chevy Astro AIR CONDITIOUNING

Tiny
DAN KARTMAN
  • MEMBER
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 67,000 MILES
My AC works but only blows out the defrost or the bottom it will not switch to the main vents
Thursday, December 13th, 2007 AT 3:55 PM

1 Reply

Tiny
TOBYU
  • MEMBER
  • 89 POSTS
Most likely a vacuum leak. Vacuum from the engine is what the dash control uses to move the diverter flaps that change the air flow.
I think the Astros had a plastic ball under the hood. Hooked to the under side of hood. This is a vacuum reservoir.
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Friday, December 14th, 2007 AT 2:43 AM

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