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Old 10-10-2015, 11:23 AM   #15
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Naples, FL , Hood River, OR
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It's not your t/ stat, but the 120 VAC power feeding the upper unit. Check your circuit breaker or main power supply. The t/stat operates on 12 VDC.

You lost 120 VAC at some point during the night.

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Old 10-10-2015, 03:19 PM   #16
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Originally Posted by Mellen60 View Post
Does anyone know what an E7 error message means? It was 31 degrees last night and I couldn't get the Dometic to work properly. When I first turned it in it ran great. Then as I got too warm, I turned the temp down 4 degrees. Then it wouldn't come back on. I'm ready to rip it off the wall. Help please!
Were you trying to use the furnace or the heat pump? You don't need AC power for the furnace, and 31 is too cold for the heat pump to operate efficiently.


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Old 10-10-2015, 04:35 PM   #17
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It happened to me this summer.... your batteries are toast!
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Old 10-13-2015, 03:40 PM   #18
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Grand Blanc , Michigan
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E7 Loss of Power

Thanks for the help. I ended up calling the Dometic help tech line and for $32 of support, the fix was, "Just unplug it, wait 5 minutes, and plug it back in." It worked after that. Ugh!

Thank you for trying to help me. I appreciate it. Kelly

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