Rm2193 3 way fridge won't cool on propane

Discussion in 'Heating / Cooling Systems' started by barryneary, Jul 30, 2017.

  1. barryneary

    barryneary New Member

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    Hi guys,
    This is my first post here so here goes. I have a Dometic RM 2193 3 way fridge in our 2004 Palomino pony pop up. The trouble it's even though it cools perfectly on AC and DC it won't cool at all on propane. The flame ignites and burns very small, (probably the size of the top of a leadin a pencil) but very blue. The flu heats up but the fridge won't cool. I've removed the baffle and clean the flue till it shines, but still no cooling on propane. Next step is to remove and clean the burner itself. If this doesn't work do you have any other suggestions of why it might not be working? Any help would be greatly appreciated!!
    Thanks
     
  2. xxxapache

    xxxapache Well-Known Member

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    Sounds like low gas pressure.....My TT did not cool well on gas when I got it. Fortunately, it has a gauge at the fridge. Adjusting the regulator was simple. I feel certain you won't have a gauge. You can find instructions on the internet how to make a manometer to do the job
     
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  3. Douggro

    Douggro Active Member

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    Welcome fellow new member!

    Try the burner cleaning first. You should have a more substantial flame than that. There are a few good videos on YouTube for doing the burner cleaning. I just cleaned mine, same model, today based on the recommendations I read here after trying the propane operation side and getting poor performance.
     
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  4. BirdsNest

    BirdsNest Active Member

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    I have a Dometic 3-way in my PUP as well and had the same problem the first time I tried to use it. It worked fine on electricity (both AC and DC) but wouldn't work on gas. When I got home, I pulled out a big can of compressed air, blasted it EVERYWHERE the gas goes, brushed everything out with a small clean hand broom, blasted it all with air again, and now it works great. There was plenty of dust in there, but I suspect the main issue with mine was the spider who had made a nest inside the pilot light area (webs blocking the gas lines) and who very grudgingly came out once I had torn up his/her house with the tornado wind gusts.. ;)

    Also, if your PUP has an outdoor gas grill that sets up next to the fridge, try running that stove for a few minutes before you light the fridge. If not, do it with the inside stove. That will pull the gas through the lines to get it closer to the fridge so there's actually enough gas in the line there to properly light the fridge pilot light and burner.
     
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  5. Spridle

    Spridle Active Member

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    It's become a yearly thing for me to pull the burner tube out, blow it out and use a utility knife blade to slide the burner slots clean. I really should just replace the burner, but it's a five minute thing once a year at this point. Nice and bright flame now.
     
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  6. barryneary

    barryneary New Member

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    Thanks for the kind welcome, and the suggestions guys!!
    Just got finished removing and cleaning the burner and the base of the flu and it seems like it is working now. It's dropped 14 deg in an hour and a half, and is sitting at 3 deg now. Awesome!!!!
    It just needed a little tlc!
    Thanks again for the help!!!!
     
  7. Douggro

    Douggro Active Member

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    Good thing that we understand that's in Celsius.. ;)
    Glad that you got it working better!!
     
  8. Mike wilson

    Mike wilson New Member

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    Hello everyone
    this is my first time on here I have a 1.9cb pop up tent trailer fridge that won't cool on lp gas. I cleaned the Burner & the jet as well the flue and it still won't cool down it dos works good on ac & dc but not on lp gas. And I get good flow of gas to all the other spots so I don't think is a flow problem. Is there something les that I can try. As well it not easy for me to take it in because I leave five hours from the closest repair shop
    If you can help that would be great
     
  9. Toedtoes

    Toedtoes Well-Known Member

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    It could be a leak in the fridge that is causing a low pressure. Might try the thermocouple. Also make sure that there is nothing blocking the ventilation above - even a pushing back of a board can block it enough to prevent things from working properly.
     
  10. SteveP

    SteveP Well-Known Member

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    You can try cleaning the orifice. You will have to dismantle the burner, the orifice is at the point where the gas line connects to the burner tube. Soak it in denatured alcohol or another clean solvent over night and blow through it with compressed air. Do not stick anything into the orifice hole itself, the brass is soft and you could easily deform the hole.
     
  11. Mike wilson

    Mike wilson New Member

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    I did try that and after I put the air to it I tried it again and it was the same as when I started
     
  12. Mike wilson

    Mike wilson New Member

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    There is nothing blocking the ventilation on it. But do you think that it can be a bad thermocouple on it and when it stops raining I'll go out and spray soapy water on all the spots that I can see and see if I can find something
     
  13. Katskamper

    Katskamper Active Member

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    im visual. i need pics
     
  14. Toedtoes

    Toedtoes Well-Known Member

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    I'd look for leaks first. More dangerous and cheaper to find.
    When my thermocouple went bad, it wouldn't maintain a pilot light. But if you've cleaned everything and there's no leaks, then it's a fairly cheap and easy thing to replace and try.
     
  15. Mike wilson

    Mike wilson New Member

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    That is just it I don't have a pilot light on my fridge but thanks I'll see what I can find I just don't won't to have to get a new fridge
     
  16. mstrbill

    mstrbill Active Member

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    There's no pilot light on these fridges, that little flame is all it takes to generate the heat needed to make the heat cycle work.
     
  17. Toedtoes

    Toedtoes Well-Known Member

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    That's why I added that bit. I'm not sure how to check for a bad thermocouple on these "newfangled" contraptions. :)
     
  18. Toedtoes

    Toedtoes Well-Known Member

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    But if the thermocouple is bad, then the heat cycle won't work, right.
     

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