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Old 05-30-2022, 08:50 AM   #1
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Frig not getting down to temp

So my new to me 04 Sunseeker frig is not getting cold enough. I have had the rv plugged into house power for over 12 hours now and the frig temp is still only about 68 degrees �� propane tank is off and the control on the outside of frig is set to auto. Other than that I do not see any controls inside frig to adjust cooling. It is a Dometic rm2652 model. Thoughts please
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Old 05-30-2022, 09:40 AM   #2
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Read this thread…
https://www.forestriverforums.com/fo...ge-235231.html
and check the position of the thermistor. Let us know if you don’t have a thermistor. Look for the blue arrow decal on the right wall as shown in the thread posted above.
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Old 05-30-2022, 09:54 AM   #3
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Are we talking about the little plastic piece that is attached to the metal fin with the probe in the middle ?
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Old 05-30-2022, 10:33 AM   #4
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Are we talking about the little plastic piece that is attached to the metal fin with the probe in the middle ?
Yes, the linked thread refers to the probe as the thermistor. Push the probe higher to make the fridge cooler - lower for warmer. Pushing the plastic clip up without moving the probe has no effect contrary to what some have attempted.
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Nights Camped: '13 = 49/'14 = 74/'15 = 74/'16 = 85/'17 = 110/'18 = 111/'19 = 86/'20 =108/'21 = 115/'22 = 68; Booked for 2022 = 41
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Old 05-30-2022, 10:41 AM   #5
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Why do they, rv frig makers, have to make it different �� why can’t they just install a dial like your home frig ????
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Old 05-30-2022, 10:48 AM   #6
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Why do they, rv frig makers, have to make it different �� why can’t they just install a dial like your home frig ????
Why doesn’t your home refrigerator operate on propane or electricity at your choice and have an ammonia mixture in it instead of Freon?

BTW, you do have controls inside to adjust temperature, you just didn’t see it.

What is that gadget stuck to the wall next to the thermistor probe? Is that some owner installed temperature control (has a 2 on it) or merely a thermometer sending unit?
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Old 05-30-2022, 10:51 AM   #7
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Yeah previous owners install a temp sending unit with alarm if temp drops of course don’t hav the other end of it so it’s useless
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Old 05-30-2022, 10:55 AM   #8
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I see from searching the web that newer models are available. I have the indoor/outdoor version at home and in my trailer for viewing indoor and outdoor temperature.
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Old 05-30-2022, 11:03 AM   #9
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Take the outside fridge cover off of the RV so you can see the back of the thing. Reach in and feel around. Things should be hot so be careful. If everything is room temperature check your breakers inside.
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Old 05-30-2022, 04:01 PM   #10
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Yeah everything is hot, almost can’t keep your hand on it it’s so hot, but frig is still struggling to get below 69. Freezer is kickin it at about 19 degrees. Have the sensor/ probe about as high as it will go on the metal fin
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Old 05-30-2022, 04:07 PM   #11
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Yeah everything is hot, almost can’t keep your hand on it it’s so hot, but frig is still struggling to get below 69. Freezer is kickin it at about 19 degrees. Have the sensor/ probe about as high as it will go on the metal fin
Now I suspect all you need is time. These take longer to cool off than many think… and the freezer always gets cold long before the bigger box cools off. I’m a little surprised your freezer is already 19 degrees.
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Old 05-30-2022, 04:25 PM   #12
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Me too, it is pretty hot here today, about 90 out. I’m sure that must have some considerable affect. By the way I turned the propane back on not sure if that has any bearing due to the fact I have had house power connected.
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Old 05-30-2022, 04:31 PM   #13
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Add more perturbations to our “experiment” and you won’t know for sure what solved your problem(s).
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Nights Camped: '13 = 49/'14 = 74/'15 = 74/'16 = 85/'17 = 110/'18 = 111/'19 = 86/'20 =108/'21 = 115/'22 = 68; Booked for 2022 = 41
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Old 05-30-2022, 04:37 PM   #14
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I agree. You need more time for it to cool and every time you open it up, you lose a lot of “cool” especially if you have nothing else in there but air. Put some cold water bottles inside so that you have some mass to retain the cold. Otherwise, whenever you open the door to check the temp, all the cold will escape with the air that flows out. Propane will cool it better but your 120v seems to be working.

If this is your first absorbtion fridge, you are learning that they don’t work like the compressor fridge in your house. They need a thermal mass, they are slow to cool and opening them will set you back hours. Get a remote thermometer.
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Old 05-31-2022, 07:01 AM   #15
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One thing that will help is to install a fan in the outside cabinet to increase the airflow over the coils to get rid of the heat. Fridges all work by removing the heat from the food compartment and transferring it to the outside. Kits are available in lots of places to do this and I installed one that has a thermostat on it as to when to kick the fan on. The fan is a muffin fan like used on a PC and it gets the 12 VDC it needs from a terminal on the fridge.

I also put s a switch on the cabinet heater because I live in a very low humidity environment and my fridge doesn't "sweat". This save the battery and reduces the heating of the cooler frame.
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Old 05-31-2022, 07:04 AM   #16
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Old 05-31-2022, 08:52 AM   #17
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We also had issues with fridge temps. We found this works pretty well for us even in 90 degree weather. Move thermistor to a fin that is closer to center (not on the end fin). We bought a small battery powered fan that we keep on in the fridge. The batteries lasted for an entire 6 week trip! Keep the fridge full. I freeze some gallons of water and put one in the freezer and one in the freezer to help with initial cool down. Finally, resist the urge to open the door. The cold air escapes quickly. Also when I fill the fridge I try to make sure everything is already cold. If adding room temp items I try to only add a few at a time. One time I put 6 bottles of water in at the same time and it took 12 hours to get back down to temp. Good luck!

I know some suggestions were already given here and we always appreciate the advice on this forum.
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Old 05-31-2022, 10:55 AM   #18
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Buy the Dinosaur Electronics THURMADJOSTERDOMETIC
Dometic variable thermistor adjuster. Around $35 on Amazon.
Even with the plastic thermistor adjuster clipped to the top of the fin, our fridge wasn’t cold enough to keep ice cream. With this, easy to install, device, I had to dial down the temperature adjustment.
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Old 05-31-2022, 11:41 AM   #19
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Snip-The-Tip

I had the same problem, and after verifying installation clearances and getting more airflow in the back of the refrigerator, I came to the conclusion that the thermistor just wasn't quite right. So like Denny B above, I went to a variable thermistor -- but I went with the Snip-The-Tip. Installation was straight forward, even easy.
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Old 05-31-2022, 04:36 PM   #20
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My tip

When I start up the fridge after it has been off a while, I put 2 half gallons of water in the freezer and 2 in the fridge section. It seems to help it kick start the cooling process. I do this 1-2 days before I stock the fridge.
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