Question about Dometic RM2852 Refrigerator

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Dometic refrigerator inconsistent temperature

I have a six month old Dometic refrigerator model RM1350 (13 cu. ft.) that worked fine the first four months I owned my fifth wheel. The past couple months, the temp will rise for no apparent reason. With the doors left closed I have seen the temp display go from 38 degrees at bedtime and be 50 degrees in the morning. At first this appeared to happen randomly about once a week and began to happen more frequently over time. Now it happens almost every day. A week ago, I took my fifth wheel to Holday World of Houston. They keep me there for two days to run some tests required by Dometic. After wasting two days of my time and charing me $145 without repairing the problems, Holiday World stated that Dometic had declared there was no problem with the refrigerator. The high refrigerator temps were due to too much space on each side of the refrigerator in the cabinet. No explanation why the refrigerator cooled with no problems for four months in the same cabinet. They claimed the refrigerator had to be removed and the cabinet rebuilt. There was about 3/4 inch of open space on each side of the refrigerator. I filled the open space with insulation and still have the same cooling problems. The temp display does not always show the actual refrigerator temp that I have checked with a normal room thermometer. Sometimes the temp display shows 5 to 10 degrees higher than the actual refrigerator temp. I discovered that running the built-in refrigerator diagnostic test appears to reset something because the temp slowly comes back down over 24 to 36 hours. I have measured a temp of 50 degrees with the room thermometer while the temp display on the refrigerator indicates 55 degrees. I then run the refrigerator diagnostic tests and over a 24 to 36 hour period the temp display and the actual temp inside of the refrigerator will slowly come down. Does this really appear to be a cabinet problem as Dometic technical support claims? Or could there be something wrong with the refrigerator controls? A circuit board problem? A thermostat problem? I can't get Dometic to honor their warranty because they claim that the problem is with the cabinet built by the fifth wheel manufacturer which happens to be Pligrim International who went bankrupt in December. Seems to me a convenient excuse by Dometic to blame a bankrupt company which they no longer have to sell refrigerators to. And screw the end customer stuck with their crappy expensive refrigerator. Has anyone else had similiar cooling problems with their Dometic refrigerator? I can be contacted via e-mail at

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  • pbsmith28 Mar 15, 2009

    We have a Dometic RM 2862 refrigerator installed in our 2005 Mobile Suites 5th wheel. The freezer works fine but the refrig. will go from 32 degrees to 60 degrees in one day. It seems to recover a little over night but then goes right back up during the day.

    Does anyone have a solution to this problem?

    Peggy Smith

  • NWStever Apr 08, 2009

    Same problem but with a 2006 RM2454. It worked fine for 2 years then started doing the same erratic cooling on gas last year. Seems OK on 110V. Don't know about 12V as I stopped using that option after showing up at my destination more than once with a low house battery. I'm going to replace the thermistor and the control board as everything else has checked out. Replacement Dinosaur board should be here by the weekend. Hope it works as I'm quite frustrated by this problem.

  • pbsmith28 Apr 10, 2009

    We fixed our problem by replacing the fridge two weeks ago and the new one seems to be working so much better than the old one. Only have it set on 4 and it cools fine. When they took out the old one there was 3 inches of insulation on both sides and the top. Sent our paper trail of problems to Dometic and they say sorry our warranty is expired even though we have had problems all along. We took the extended warranty on this one which gives us 6 yrs. I really wanted to get a Norcold but the wood panels would have to be cut down so got another Dometic.

  • Mollie Dec 30, 2012

    Have a 2011 Alpine and have the same problem with our RM1350 Dometic Frig.



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Yes the clearances on gas absorption frig is critical. Not to say there is not another problem. Is the thermister attached to the frig fins?

Posted on Mar 19, 2009

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These friges only work well when perfect level,Also check that the vent is not clogged

Posted on Apr 07, 2009

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I have two diferent compressor other one is using R600 and R134a but my frigeretor is ysing R600 gas can i put the one is using R134a

Posted on Apr 08, 2014

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