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Old 06-25-2017, 01:02 PM   #1
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2017 sierra 378fb AC ISSUES

Our dometic AC zone 1 is reading inside temp. of 32 degrees so the unit will not stay on. Any ideas would be greatly appreciated as it is very hot here in S.C.!
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Old 06-25-2017, 09:09 PM   #2
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AC Issues

Do you have 2 AC units?? If so what is zone 2 temp reading??? Also check the inside temp when switched to cool and recheck it with it turned off, any change?? You can do a search for dometic ccc2 thermostat and instructions on resetting the thermostat.
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Old 06-26-2017, 05:29 AM   #3
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Yes 2 units. Zone 2 temp reading inside fine. 76 degrees. Did change when unit off. We did a reset, then got a couple of E1 errors on both zones, unit shut down, then came back on and has been working fine for 8 hours. Go figure! This is a brand new RV so we will have service check it out with a few other things. Thanks for the response!
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Old 06-26-2017, 11:59 AM   #4
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We've seen several posts lately of the exact same thing you described. Zone 1 reading 32 and Zone 2 reading fine.

Initializing the t-stat seemed to work, but we don't know for how long.

Zone 2 uses a remote thermistor and Zone 1 uses an internal thermistor and I think that's where the problem is.
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Old 06-26-2017, 01:52 PM   #5
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Thanks! Will be taking it in for service and will let everyone know how it shakes out.
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Old 06-30-2017, 04:19 PM   #6
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AC Issues

You may want to do a search on the error code, I do believe it was a problem with condensation corroding one of the connections in the ac unit.
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Old 08-06-2017, 06:54 AM   #7
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Been back and forth to camping world. Still no AC. Can someone please recommend a Forest River contact?
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Old 08-07-2017, 06:58 AM   #8
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Tobi Conroy is the warranty person I worked with (tconroy@forestriverinc.com), she was very helpful.
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Old 08-07-2017, 07:00 AM   #9
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Thank you!
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Old 08-07-2017, 07:09 AM   #10
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Bypass the DR dealer and find a dometic authorised service center. That's what I did, 3 days it was replaced under warranty.
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