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Q:

Why won't the air blow out of the feet or face or defrost according to the contr on 2002 Pontiac Sunfire

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With the AC running, when I put the controls to feet only, the air blows out the feet, but when I set it to blow on the face only or defrost, it blows on the feet. What is the problem? I do not hear a vacuum noise when changing the setting.
(1) Answer
check your blend door actuator