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Old 03-28-2022, 08:12 AM   #1
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2021 27' Flying Cloud
brookshire , Texas
Join Date: Oct 2021
Posts: 10
Fridge causing inside temp gauge to heat up

We have kept our rig plugged in when stored. Our fridge runs all the time (this is what we did for twenty years with our last reg). We went in the rig to prepare for an upcoming trip. We turned the AC on and noticed that the indicated indoor temp was 94 degrees. This was not right as we have a manual temp gauge. When we investigated, we noticed that the wall where the interior gauge was is the fridge wall. It was warm. I do believe this is a design flaw.

However, this begs the question, should we keep the fridge on while storing?
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Old 03-28-2022, 08:23 AM   #2
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2008 27' International FB
Petaluma , California
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Originally Posted by Kriswin View Post
We have kept our rig plugged in when stored. Our fridge runs all the time (this is what we did for twenty years with our last reg). We went in the rig to prepare for an upcoming trip. We turned the AC on and noticed that the indicated indoor temp was 94 degrees. This was not right as we have a manual temp gauge. When we investigated, we noticed that the wall where the interior gauge was is the fridge wall. It was warm. I do believe this is a design flaw.

However, this begs the question, should we keep the fridge on while storing?
I don't. Mine is propane but even if it wasn't, I'd leave it off with door cards installed to ensure that the inside doesn't get moldy. I guess that you could argue both ways being that household fridges run 24/7. - Brad
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Old 03-28-2022, 09:22 AM   #3
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2017 25' International
West Lake Hills , Texas
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Our AS is plugged in during storage but fridge is off, door propped open.
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Old 03-28-2022, 03:34 PM   #4
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2021 27' Flying Cloud
brookshire , Texas
Join Date: Oct 2021
Posts: 10
I guess the second question is about the heat the fridge is putting off to make our temp gauge say it is hotter than it is in the rig. Is that a normal happening? or is our fridge getting hotter than it should.

kw
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Old 03-28-2022, 07:14 PM   #5
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1988 32' Excella
Robbinsville , New Jersey
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Originally Posted by Kriswin View Post
I guess the second question is about the heat the fridge is putting off to make our temp gauge say it is hotter than it is in the rig. Is that a normal happening? or is our fridge getting hotter than it should.

kw
I've seen a couple threads complaining about that "feature" so it does seem to be "normal" in some models. I believe one of the people with that problem said they just unfastened the sensor, pulled it out a bit and let it hang away from the wall (at least as a temporary solution).
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Old 03-29-2022, 05:22 AM   #6
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2021 30' Globetrotter
Oviedo , Florida
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Where is the thermostat/temp sensor in relation to the fridge? Do they share a wall? If they are close, it would make sense that the heat from the fridge would effect the temperature reading. The fridge is certainly going to heat the trailer up some when it is on, but since you are not opening the door when it is in storage I would not think the compressor is running very often.

I leave my fridge off with the door propped open in storage. Some people say if you leave it running all the time you're just wasting energy and unnecessarily wearing out the innards. I think it's just a matter of personal choice.
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Old 03-29-2022, 06:43 AM   #7
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2021 20' Caravel
Plaistow , New Hampshire
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Our frig is off when not in use.
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Old 03-29-2022, 09:31 AM   #8
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Oswego , Illinois
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Originally Posted by Wazbro View Post
I've seen a couple threads complaining about that "feature" so it does seem to be "normal" in some models. I believe one of the people with that problem said they just unfastened the sensor, pulled it out a bit and let it hang away from the wall (at least as a temporary solution).
Not quite the same, but my CCC (1) thermostat is on that wall. It was inaccurate by almost 5*, due to the heat from the fridge compartment providing false inside ambient temp. When I had the fridge out for a cooling unit replacement, I lined the wall with bubble foil insulation (not enough clearance between fridge and wall for anything thicker). The thermostat is now within 1* accuracy of inside trailer temp.
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Old 03-29-2022, 10:35 AM   #9
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2015 30' International
Escondido , CA
Join Date: May 2018
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Quote:
Originally Posted by Kriswin View Post
We have kept our rig plugged in when stored. Our fridge runs all the time (this is what we did for twenty years with our last reg). We went in the rig to prepare for an upcoming trip. We turned the AC on and noticed that the indicated indoor temp was 94 degrees. This was not right as we have a manual temp gauge. When we investigated, we noticed that the wall where the interior gauge was is the fridge wall. It was warm. I do believe this is a design flaw.

However, this begs the question, should we keep the fridge on while storing?
We lived in a 27' International Front bed for 3 years and never noticed any heat building up on the wall unless it was from the TV that hangs on that wall. It may be that we just didn't pay close of attention because the heating element is closest to the wall the TV is on, so I suppose it could be heating it up. Regardless, I too would recommend turning off the refrigerator and keeping the door ajar so it doesn't mold or age the heating element anymore than necessary.
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Old 03-29-2022, 11:45 AM   #10
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2021 25' International
Boerne , Texas
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Same issue with 2021 International 25', The AS dealer I purchased from was unable to fix problem, they pulled out sensor, injected some calk, replaced sensor. I called AS customer support, spoke to someone that said they were familiar with problem and they sent me attached fix.
Attached Files
File Type: pdf RemoteTempSensor.pdf (622.6 KB, 14 views)
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Old 03-29-2022, 12:18 PM   #11
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2017 25' Flying Cloud
Woodway , Texas
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AC Temp Awry Due to 'Fridge

The wall is poorly insulated from the fridge compartment and even with the prescribed fix, the temperature may still read high. What to do?

Remove the little louvered button and pull the wire out a little; the device connected to both ends of the wire is a solid state device called a thermistor which varies in resistance according to the ambient temperature.

You can clip the wire about 3" - 4" from the thermistor and either solder a 2' length of speaker wire to it or if you don't have access to a soldering iron/gun, simply use small wire nuts to connect both ends. The thermistor is non-polarized so don't worry about which wire went where. Additionally, it's a signal wire so there's no current flowing that might cause a shock while you work.

We simply put the wire behind the TV using zip ties and positioning the thermistor between the lower part of the set and the wall. Afterwards, the variance is only a few degrees, depending on shade, awning deployment, etc.

If you DO want to use AS's fix, you may want to mount everything on a 1/2" piece of Styrofoam to eliminate any heat transfer that might occur with thinner materials.
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Old 03-29-2022, 01:14 PM   #12
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2015 25' FB Flying Cloud
Grapevine , Texas
Join Date: Apr 2017
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Thermostat at Fridge wall reading

After six years of having the same "problem/reading" of the thermostat, we just set the AC temp about twenty degrees higher than desired for that part of the Airstream. Seems the fridge system just heats up the adjacent wall that much. Not a functional problem, just a bad install location for that unit.


We had to do some massive re-fit, during which the fridge got temporarily removed from the trailer. I had the technician re-locate the thermostat towards the "center" of the trailer, but on the same wall. No re-wiring required. Plugged the original hole, put the television back on that same wall, problem solved.


I would recommend the factory move the thermostat away from the heat of the fridge equipment in the future. Bad location in any case.


Also, we turn OFF the fridge and prop open both doors when not using the trailer, and/or when in storage.
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Old 03-29-2022, 01:36 PM   #13
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2019 25' Flying Cloud
Greeneville , Tennessee
Join Date: Jul 2008
Posts: 436
I never have that problem. We have always kept our AS plugged in and the fridge running all year long. I'm not saying that is the correct way to go but this is our 4th AS over the years and it's never been a problem (yet!).
Happy camping.
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Old 03-30-2022, 07:56 AM   #14
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1976 24' Argosy 24
1999 30' Excella 1000
White Haven , Pennsylvania
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Our 99 classic does the same thing. The ac thermostat reads 10 degrees high due to the fridge. We just compensate, but it's annoying.
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Old 03-30-2022, 09:41 AM   #15
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2017 25' International
West Lake Hills , Texas
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I had a similar problem at home. Backside of thermostat wall were two flues coming from the basement furnace and water heater. Big fluctuations in room temp depending on whether the furnace and the water heater were running. Infrared thermometer revealed a warm wall. I moved the thermostat to a different wall (attic access). Problem solved. Both thermostats on the main floor were poorly located. The second one was near the middle of the other zone. So, it isnít just Airstream that struggles to get this right.

Putting a quarter-inch of space between the wall and the thermostat had helped a little but wasnít a complete fix.
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Old 03-30-2022, 12:34 PM   #16
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1988 32' Excella
Robbinsville , New Jersey
Join Date: May 2012
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Quote:
Originally Posted by emelaich01 View Post
The wall is poorly insulated from the fridge compartment and even with the prescribed fix, the temperature may still read high. What to do?

Remove the little louvered button and pull the wire out a little; the device connected to both ends of the wire is a solid state device called a thermistor which varies in resistance according to the ambient temperature.

You can clip the wire about 3" - 4" from the thermistor and either solder a 2' length of speaker wire to it or if you don't have access to a soldering iron/gun, simply use small wire nuts to connect both ends. The thermistor is non-polarized so don't worry about which wire went where. Additionally, it's a signal wire so there's no current flowing that might cause a shock while you work.

We simply put the wire behind the TV using zip ties and positioning the thermistor between the lower part of the set and the wall. Afterwards, the variance is only a few degrees, depending on shade, awning deployment, etc.

If you DO want to use AS's fix, you may want to mount everything on a 1/2" piece of Styrofoam to eliminate any heat transfer that might occur with thinner materials.
I'd suggest a 1/2" thick piece of anti-fatigue mat, Styrofoam is too brittle and can makes a mess.
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