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Old 11-09-2008, 01:38 PM   #1
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Default Heater/AC control

We have a problem with our 96 Bonneville. We cannot change the vents for the heat/AC. It is not in the controller, I replaced it recently and everything else works. When you push the Mode buttone it does not switch the air outlets. It is always on the split defrost/floor setting no matter what the control panel indicates. Any ideas on how to repair this?
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Old 11-09-2008, 04:20 PM   #2
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Have you checked the vacuums lines for leaks?
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Old 11-09-2008, 08:42 PM   #3
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No I haven't, I'll have to see what I can find. Is that how the vents change?
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Old 12-19-2010, 08:05 AM   #4
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I have the same problem with my 96. The electronic temp units require a "ac controller" unit to change to fresh air or heated air and the defrost to floorsettings. This drove me crazy! At first I even bypassed the heater core during the summer because the door was stuck on heated air. It Sucked, I'm still looking for a used controller for this car. I've been quoted $700. for a new one! Still looking!
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