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Old 02-17-2021, 06:28 AM   #1
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2021 sunset trail 253rb a/c problem

Recently purchased the 253 rb sunset trail. The rv has 50amp plug with 2 ac’s. 15k vented with airxcel thermostat and 13.5k in bedroom. I brought the rv to dealership because my 15k ac will not work on any of the low settings. Low fan, low cool and low cool auto will not work. Only made a humming noise then shut off. The unit worked flawlessly on the high settings. The dealership changed the thermostat and also changed circuit board. When I went to pick it up, now it doesn’t work on high cool or high cool auto. Any ideas what could be the problem? I left it with them and they are continuing to figure out what the issue is. Still no answers.
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Old 02-17-2021, 09:14 AM   #2
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Welcome to the forum. Since it was working on high and auto and not low. But now working on low but not high and auto. It is either the thermostat or how it is wired or hooked up. At least it’s new and under warranty. Let us know what they find.
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Old 02-17-2021, 04:02 PM   #3
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Welcome to the forum!
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Old 02-20-2021, 01:45 AM   #4
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Finally located the problem. It was a grounded wire.
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Old 02-20-2021, 07:26 AM   #5
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Thanks for reporting back with what you found wrong. Many don't extend that courtesy.




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Old 02-20-2021, 09:22 AM   #6
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Glad you found it out. Had a similar problem with my main panel having a loose wire.
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Old 02-21-2021, 02:11 PM   #7
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That will do it all the time.
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