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Old 03-23-2015, 06:35 PM   #1
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Dometic CC2 issue, or not?

I am having an intermittent issue. When my CC2 is off, you can push the "inside temp" button and get an accurate reading. But if you turn the CCC2 ON and then try the "inside temp" it will read 32F.

This is a problem because this results in no thermostatic control of the heat!!! I have to get up and turn it on/off as needed (as requested by wifey!)

This started yesterday... We are at the OR coast, in the rain. I have read similar issues that say to try reset/unplug etc. I have tried all of those and nothing...

Any suggestions before I tow to the dealer?

Thanks!
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Old 03-23-2015, 07:12 PM   #2
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I was plagued for months with the same issue.. no one could figure it out.. the issue is the cable for the remote temp sensor is wet.. when this occurs.. the thermostat will read 32 degrees and you won't be able to control heat or air.. a real bummer..

If you take the inside cover of the AC off .. there's a wiring harness that has some telephone like connectors and perhaps .. a cable with a plug that isn't connected to anything .. See the image attached .. i've circled the cables that you'll need to insure are dry..

In my case the remote sensor (cable circled in image that's not connected to anything) was in a channel (Air Conditioner frame) that was collecting water.. if i stuck the cable end in water.. the thermostat would read 32 degress.. take it out of the water .. all back to normal..

Hope this helps..
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Old 03-23-2015, 07:15 PM   #3
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Old 03-23-2015, 07:31 PM   #4
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[QUOTE=dsaxon22;1597658]I was plagued for months with the same issue.. no one could figure it out.. the issue is the cable for the remote temp sensor is wet.. when this occurs.. the thermostat will read 32 degrees and you won't be able to control heat or air.. a real bummer..

If you take the inside cover of the AC off .. there's a wiring harness that has some telephone like connectors and perhaps .. a cable with a plug that isn't connected to anything .. See the image attached .. i've circled the cables that you'll need to insure are dry..

Unfortunately his 2015 has ducted air so you can't access anything from the inside.
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Old 03-23-2015, 07:33 PM   #5
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I have had the same issue a few times and have used the same fix. The issue crops up under extreme humidity. Since it should not happen at all and it does not happen to everybody, I suspect an inadequate seal between the inside and outside on the AC unit on some Airstreams. Lewster may have addressed this issue in one of his previous posts. Jim


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Old 03-23-2015, 07:42 PM   #6
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Thanks for the feedback!

I pulled the vents off (I do have the ducted AC) and I can see the cables, but I am a shorty and can't get to the end of them!

If I run the heat pump for a while it seems to start working again. All signs point to moisture...

Another item for the dealer to sort out of me, the list is growing!
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Old 03-23-2015, 08:47 PM   #7
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Airstream once again dances to their own tune. The list grows daily!!

These A/C problems have cropped up since the factory ditched the old plastic drain pan and joined the rest of the RV world in using the Dometic auxiliary drain kit with the external cups and hose arrangement for channeling the A/C condensate into the interior drain tubes and off the roof.

Only one problem............... these kits are meant to be used with 2 roof sealing gaskets and Airstream uses only one.

This, along with the increased roof height of the '15 models and the accompanying increased roof curvature can create a 'moist situation'.

It is rather invasive to have to remove the roof A/C and it's accompanying gasket seal and replace with 2 new seals and re-install the drain kit, but that WILL solve your problem.

Barring the application of this 'full monte' fix, I would have the dealer wrap the offending data connections in self-sealing foam pipe insulation and tape the ends. That should keep the moisture away from the connections.
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Old 03-24-2015, 01:42 PM   #8
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A quick, emergency fix: After they dry out using mother nature or a hair dryer; spray the connection with the clear battery connector protection plastic coating. This should last untill you can get the correct seals installed.
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Old Yesterday, 09:30 AM   #9
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Camping in New Orleans this weekend with 2 days of heavy cold rain, 2015 27fb dual A/C, heat pump in the bedroom (zone 1) and lounge area (zone 2) was set at 68 degrees auto fan and HP for both. Woke up twice in the middle of the night burning up (bedroom heat pump running zone 1) and pressed the inside temp button for the bedroom and the temp indicated 74 degrees. The lounge area was nice holding the temp at the set 68 degrees. (I am sure the heat pump was not running in the lounge area very much as the ducts are all connected). Since it had did this the night before as well I did a reset on the Thermostat hoping this would help. It did not help. When I woke up to a hot bedroom I cycled the power button on the thermostat and it shut the unit off and when I re-powerd it the unit remains off until the 68 degrees set point is reach and then it turns on the heat pump and will run the temp back up to 74. (Lounge area where the remote temperature sensor is works great) I reported this 4X while under warranty to my dealer and also on a trip to JC. Neither could duplicate the issue, so it went as unresolved, but it's real. (I have it documented) A side note when I took delivery of my new AS Zone 1, BR A/C H/P was dead on arrival and was replaced with a new unit. Any help where to start to diagnose and repair this issue is welcome!
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