99 Bonneville AC problems

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  #1  
Old 06-24-13, 07:38 PM
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99 Bonneville AC problems

AC is fully charged, compressor's fine, it will only blow hot air, no matter what I set it just blows the same hot air.
 
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Old 06-24-13, 08:52 PM
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Welcome to the forums.

Have you confirmed that when you put the control in AC mode that the compressor kicks in ?

You should have some kind of blend......hot to cold control.....does that do anything ?

It sounds like the blend door is stuck in heating.
 
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Old 06-25-13, 11:58 AM
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the compressor is working fine, what typically causes the blend door to stick and how to fix it?
 
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Old 06-26-13, 02:33 AM
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If the temperature adjustment knob feels mechanical/stiff then it's a mechanical door and the cable could be getting stuck.

If it's a smooth type adjustment then it's vacuum operated and could be stuck due to loss of vacuum or vacuum leak.
 
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Old 06-26-13, 04:43 AM
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And on some makes/models, the blend door itself (or a hinge) can break.
 
  #6  
Old 07-10-13, 09:23 PM
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If believe this car uses vaccum operated blend controls and there is a good chance that the blend door would stay stuck in "hot" position with a loss of vac. Should be a small hard plastic line that comes through the firewall somewhere on the engine side that sometimes breaks on these. If you can find the blend door actuator pull the line with the car running and see if there is vaccum present.
 
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