A/C air comes out the bottom vents when it is on 'max'. Defrost works fine.

Tiny
KATANDCHAR
  • 1992 BUICK REGAL
  • 75,000 MILES

It was fine until I changed the battery last week. I lost the a/c through the panel vents and the cruise contrl. I dont know if it is related

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Wednesday, May 23rd, 2012 AT 1:19 PM

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Tiny
HMAC300
  • EXPERT
  • 49,634 POSTS

Check your actuators for that or the switch may be bad. Also check for a vacuum leak

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Wednesday, May 23rd, 2012 AT 2:25 PM
Tiny
KATANDCHAR
  • MEMBER

I checked the actuator by pulling the vacuum line off it and it stopped operating the blend door. It appears to be o.K. The blend door operates to let the air up with the defrost setting and in the middle for the bi-level settings and the air will come out the top and the bottom. Is there is a possible second door that allows the air through the vents only? Or a fuse that operates the high setting on the switch?

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Wednesday, May 23rd, 2012 AT 11:44 PM
Tiny
HMAC300
  • EXPERT
  • 49,634 POSTS

There are two doors one for blend and the other for the direction-vents/defrost/floor etc. It could be the control head too.

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Wednesday, May 23rd, 2012 AT 11:46 PM

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