1997 Buick Skylark Heater/AC control inop

1997 BUICK SKYLARK
98,000 MILES
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JMACK5102
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My 1997 Skylark's AC and Heater units work but the vents do not change from top, mid, or bottom when switching from AC, Heat or Defrost. I suspect that it's the AC control unit or vacuum hoses. Do you have a possible solution for my problem? Thanks
Nov 13, 2013 at 2:07 PM
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SATURNTECH9
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Dou have a hand vacuum pump?
Nov 13, 2013 at 2:19 PM
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JMACK5102
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No I don't
Nov 13, 2013 at 7:14 PM
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SATURNTECH9
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I would get one so we can test for vacuum see if things hood vacuum and apply vacuum.I think they rent them at auto zone
Nov 13, 2013 at 10:24 PM
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JMACK5102
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Will do. Thanks
Nov 14, 2013 at 5:00 AM
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SATURNTECH9
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Your welcome.
Nov 14, 2013 at 9:37 AM