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A/C Only blows through defrost vents

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30K views 17 replies 15 participants last post by  archej66@gmail.com  
Vacuum leak

My AC is doing the same thing. When I turn the ignition you can hear the vacuum pump running and never stops. I can feel air coming out of this area - not familiar with what it is. Is that the heater box? If so is there a vacuum sensor just inside of that box that might be bad?
 

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