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Old 06-03-2013, 05:58 PM   #1
blackty
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Join Date: Oct 2011
Location: Bangor, Pa
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Thermostat or board?

Furnace will not run to maintain temp. After it reaches temp. and shuts off, it will not go back on by itself. I have to turn Dometic digital t-stat off and then back on to cycle. This is the one with only 3 wires (12+, 12- and comm.) Thanks...Jim
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Old 06-03-2013, 06:59 PM   #2
f6bits
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I've had mine behave in the same way, but it was a low-voltage issue when boondocking. If you can see the control board on the furnace, see if the LED is blinking. If so, do a Google search for "atwood furnace error"
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Old 06-04-2013, 06:32 PM   #3
blackty
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Thanks for the reply. We are hooked up at a permanent site. Cannot see board. The only control part of the furnace that I have direct access to is the snap disc at the heat exchanger that makes sure the circulating fan works. Anything other than that, the furnace has to come out...Jim
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Old 06-04-2013, 06:43 PM   #4
f6bits
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It looks like in your trailer, the furnace intake is below the fridge. In my trailer, the furnace is just inside the intake. In fact, if it's dark, I could see the red flash of an error code. With the intake grille removed, I get a very good view of the circuit board.

Not so in your Cougar?
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Old 06-09-2013, 06:53 PM   #5
blackty
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You know, I never thought of that. Just got back from the weekend 2 hours ago. It wasn't cool enough to run the heat. Also wasn't warm enough to run the a/c. If t-stat is the problem, it should probably act up in cooling mode. Before we left I did manage to remember to reset the t-stat(configure). Pg. 2 or 3 in Dometic t-stat manual. I did notice the lcd screen had a rainbow look to it. Maybe it shorted internally? Heading back Thursday evening. Thanks...Jim
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