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Old 09-07-2017, 07:57 AM   #1
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Join Date: Jun 2016
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Wiring digital thermostat to Coleman Mach A/C - running wire through ceiling foam ?

So I want to convert my Coleman Mach A/C to a digital thermostat on the wall, away from the in-unit controls it has now.

My only issue is how to get the thermostat wire harness FROM the Mach over to the wall where the thermostat will hang. The ceiling is what I guess is probably typical for a recent RV unit. It's got what looks like about 1/4" of plywood type material then about 6" of foam bonded to it. I'd need to run the wires THROUGH this foam stuff about 6 feet or so to meet the wall where the thermostat will hang. If I can get it TO that wall, I can get down in the wall no problem to where the thermostat is.

Has anyone ever run new wire through the ceiling of their RV ? What's the trick ?

Thanks !

Oh yeah .. this is going in a 2013 Fleetwood Jamboree, 27' Class C
Wire will run approx as below :

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Old 09-07-2017, 08:18 AM   #2
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That looks to be a slideout wall,may not be the best choice of locations ,you might end up using a surface mount wiremold inside or run the wires on the roof and cover with etherbond tape ,this maybe a couple of options.
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Old 09-07-2017, 09:33 AM   #3
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Originally Posted by tizzel View Post
That looks to be a slideout wall
It isn't. It's the location of the existing thermostat for the heater. I'm just replacing that one with a digital thermostat that runs both the heater and the A/C.

The slide actually ends to the left of the refrigerator.

Thanks !
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wiring, ceiling, thermostat

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