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<p>[QUOTE=&quot;skallagrime, post: 12183085, member: 84021&quot;]Blend doors are air actuators. Defrost i beleive is all of them closed, When you hit the others, do you hear any clunking? Or just tiny clicks? (Or nothing?) If nothing at all, you may not even have air supplied to the unit. Though from my understanding, this should only affect which vent things come out of, the top slider tells the air switch where to be, it also tells ac compressor to kick on at ac, defrost (ends) and the very center one. There are no ac electrical contacts at vent and heat (in a line starting at ac all the way left positions those would be 2,4)</p><p><br /></p><p>But the blower switch is its own thing too...[/QUOTE]</p><p><br /></p>

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