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Old 08-11-2016, 01:37 PM   #15
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Wacky thermostat Airstream fail

We have a 2013 Intnl Serenity w/ 2 A/C (bought new). I would swear the sensors and zones are reversed based on performance, but had the dealer near Austin check and... no problem found (no problem for them). We keep a good fan going all the time to try and get a constant temp throughout the unit. Major fail for Airstream considering the cost of a new unit.
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Old 08-11-2016, 01:54 PM   #16
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2017 27' International
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I noticed in my air return vent (one of two / single ac unit) that there is a senser in the vent behind the screens. My unit reports air temp in. Maybe this is different than the room temp. If it is the same, I can see why it would have a problem on very hot days.

Mine is a 2017 27fb.
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Old 08-11-2016, 03:08 PM   #17
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All good replies. The sensor for the bedroom is located in the thermostat. The one for the rear is located behind a small round white plastic cover behind the TV. If you use the diagnostic mode on the thermostat you can check the remote sensor and see if it is giving an accurate reading. Unfortunately Airstream attaches the tip of the remote sensor to the wall with a small plastic clip. As a result it is measuring the temperature of the wall and not the air. This is bad because the wall abuts the refrigerator and can get quite hot. Thus the AC unit thinks the air temperature is 85 degrees and keeps pumping out cold air. I've had mine set at 78 degrees and come into the trailer and found the air temperature to be 68 degrees. It just doesn't shut off. My fix was to take off the white cover, make a small hole in it, put in a rubber grommet and bring the tip of the sensor out so that it is waving the the air. I cannot help that it is next to a window or adjacent to the TV but it works a lot better.
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Old 08-11-2016, 04:16 PM   #18
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Durango , Colorado
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Thanks for the great suggestions and info.

I will have to dig into this further when I get time and come up with a solution.

Has anyone tried to just ditch the current thermostat and replace it with something like a Ecobee 3 Smart thermostat?

I know it is expensive but it would be nice to be able to monitor temp via the internet while away from the trailer. Also the Ecobee 3 has remote battery powered sensors that can be placed anywhere to control the thermostat.

I am not sure this is even possible with the control wiring that exists for the A/C and furnace.
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Old 08-11-2016, 04:45 PM   #19
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The Ecobee thermostat may or may not work with the Dometic units- proprietary BS-
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Old 08-12-2016, 11:10 AM   #20
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Thermostat

We have a 2013 FC 27ft, same problems. Finally at the factory last year we got the service tech to move the sensor from behind the TV to up to the top of the wall. [they were doing some work that required removal of Fridge, so it was easy for them to do]. And the tip hangs out now about 4 inches from the white cap. It still is hot up there, but it is much easier to control the cabin temp that it was before. Evidently there was plenty of wire in there to enable them to move it up. We recommend that, at least it gives the owner a better way to control it.
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Old 08-12-2016, 11:15 AM   #21
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When I remove the thermostat from the wall there is a lot of excess data cable.
The thermostat can rest in the dinette seat with the data cable still attached.
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Old 08-12-2016, 02:37 PM   #22
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We have the same problem with our two AC system. 2015 27FB. We adjust the rear AC without regard to the detected temperature reading until the rear area is comfortable.
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