Question about Dometic Rooftop RV Air Conditioner

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I have a question on Coleman AC

I got an Coleman mach air conditioner on my pop-up. Everything worked when I bought it. I brought it home the next day popped it up and plugged it in with an extension cord to a GFI outlet and the GFI blew. Then I plugged into another outlet and then the AC could not turn on. I reset the breaker switch and checked and I had power to my switch on the AC. The switches would work because I could test them with my tester. So it is in between the switches and the motor, any ideas?

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Well the repair came by and he put freon in the unit but it still blows the same the problem is my a/c is not blowing the air out hard enough u can feel the cold air when you are by the vents but its not blowing out hard

Posted on Jul 22, 2011

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First of all, an extension cord and GFI receptacle to run an AC unit will almost always blow either GFI or circuit breaker or both due to large current draw from AC unit. If an extension cord needs to be used, keep it as short as possible, and use the heavier gauge that is approved for AC use. What happens when you use an extension cord, is the voltage drop that will happen by the time the AC gets power. With any voltage drop, the amperage draw increases, so a 15 amp circuit breaker will most likely trip. Nowadays, all AC units are wired with a minimum 12 gauge wire rated for 20 amps.
You say nothing is happening now, is that to say that the fan only mode doesn't work on the AC unit either?

Posted on Apr 26, 2010

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