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Discussion Starter #1
01 f250 ext cab. when I have the air on blowing on me. it jumps from blowing on me to defrost vents. Is it a common vacuum problem. Or is it my switch. Cause on 1 and 2. I barely feel any air. but 3 and 4 are wide open. On all four settings it jumps from defrost vents to other vents.
 
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