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Coleman Mach III 13,500 btu ducted roof air conditioner

I took out the old unit and replaced it with the new one and wired it according to the wiring diagram-nothing happens. The unit acts as if there is no power. Can you advise?

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Did you plug upper unit (on roof) into lower control unit (inside). Not to insult you, because i've done it myself, in a rush situation. Breaker on? Sure you didn't mix up any wiring?

Posted on Aug 16, 2008


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Hope this helps.

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