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Old 08-06-2019, 02:44 PM   #1
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dometic rm2852 problem

Last fall it quit running in london, it ignites but doesnít get any more than that. Replaced thermocouple still nothing changes but would work on a/c. Ran it on Easter with same results, now it has quit cooling completely. the cooling unit heats up but fridge fins get hot. Canít see any yellow residue, Any suggestions?
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Old 08-06-2019, 04:23 PM   #2
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Have you cleaned the flue, and baffle?


You could try the take it out and turn it upside down for a day trick.
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Old 08-06-2019, 05:08 PM   #3
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Welcome to the forum its a great place to get your questions answered. have you kept the unit level? if the burner starts and the electrical works but it doesn't cool something has either leaked out or is plugged up. Might be time to explore getting a new cooling unit. I replace the one in my class A with the amish cooling unit (heaver piping) myself explore that option. What year is your rig? Warranty?
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Old 08-13-2019, 08:23 AM   #4
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Yes iíve had it level while trying to get it running. Going to try turning upside down to see if it will fix it
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Old 08-13-2019, 08:59 AM   #5
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If you are going to the trouble of removing it and turning it upside down you half the hard half the work done if you want to replace the cooling unit. its not a difficult job and half the cost of a new unit (the amish cooling unit is far better then OEM in my opinion) let the forum know how thing go and good luck
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Old 08-17-2019, 04:22 PM   #6
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well I removed it and found a huge bird nest on top, cleaned it up and it’s working on ac. gas pilot lites but won’t open valve to generate enough heat to cool. Any ideas?
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Old 08-17-2019, 05:16 PM   #7
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well I removed it and found a huge bird nest on top, cleaned it up and it’s working on ac. gas pilot lites but won’t open valve to generate enough heat to cool. Any ideas?
That is all there is, a pilot light sized flame...l think?
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Old 08-17-2019, 07:23 PM   #8
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Yep, it's just a pilot sized flame. And there's no adjustability to it. It's either on or off.
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Old 08-17-2019, 09:15 PM   #9
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Is the flame staying lit? The pilot sized flame should be right under resivoir that boils the ammonia. If it is working on ac it should work on gas as they both do the same thing, boil the ammonia... check to see if the flame burns continually..
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Old 08-18-2019, 10:58 AM   #10
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the flame does stay constantly lit, is that as big as it gets?
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Old 08-18-2019, 04:40 PM   #11
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the flame does stay constantly lit, is that as big as it gets?
Yes, it looks like a pilot light...
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Old 08-18-2019, 08:57 PM   #12
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Ok fridge temperature has been ranging from 35 to 49 from what i can see. Is that normal range?
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Old 08-18-2019, 10:36 PM   #13
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Ok fridge temperature has been ranging from 35 to 49 from what i can see. Is that normal range?
49 seems a little high. Have you adjusted the thermistor slide on the fins? Is it different on electric versus gas?

You might want to buy one of these to monitor the temp. It will record the high and low temps.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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Old 08-19-2019, 06:13 AM   #14
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I typed incorrect high it was 40 as the highest I saw not 49.
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Old 08-19-2019, 08:02 AM   #15
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I typed incorrect high it was 40 as the highest I saw not 49.
That sounds about perfect..
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Old 08-19-2019, 09:09 AM   #16
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Thanks for all the help
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