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Old 10-07-2012, 03:01 AM   #11
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Originally Posted by phygenius View Post
Our used 2009 Roo 21SS has the Dometic DM2652 abosrbtion refrigerator. The only indication of a temperature control is a plastic clip that slides up and down one of the cooling fins in the main compartment with a decal on the side of the unit that suggests temperature control. As an engineer, this makes no sense.

Everything except on the bottom most shelf is frozen solid.

Any other adjustment available in the control unit?
The plastic clip contains a "thermistor" and sliding the clip up and down the fin regulates the temperature by calling for "the fixed temperature of the thermistor" at that elevation in the box. It is called a "Temperature Sensing Device" in the manual on page 5 (Under "LIMP MODE OF OPERATION").

I keep it in the center of the fin and it works perfectly. (Beer cold; eggs not frozen).

"coldest positions in the refrigerator are under the cooling fins and at the bottom of the refrigerator. The warmer areas are on the upper door shelves. This should be considered when placing different types of food in the refrigerator. Arrange all food in the unit to allow for free air circulation."
From the manual.

There is also a failure mode of the DM2652 that will cause the refrigerator to run constantly until a new sensor is installed and the system reset by removing DC power from the unit.
Attached Files
File Type: pdf DM2652 User.pdf (3.79 MB, 332 views)
File Type: pdf DM2652 Parts.pdf (366.8 KB, 155 views)
File Type: pdf Dometic Refridgerators new Manual.pdf (2.90 MB, 251 views)
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Old 10-09-2012, 08:56 PM   #12
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Minutes after posting the question, I found the thermistor dangling at the bottom of the unit. I put it into the clip and now have some control on the temp.
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Old 10-09-2012, 11:47 PM   #13
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Originally Posted by phygenius View Post
Minutes after posting the question, I found the thermistor dangling at the bottom of the unit. I put it into the clip and now have some control on the temp.
Badda Bing...
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Old 08-27-2014, 12:09 PM   #14
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Herk,
I know this is an old thread, but may I resurrect it to deal with a problem I am just having? My DM 2652 always stayed at 36-44 degrees depending on outside temp. On this trip, roads were rough and the plastic slider and thermistor fell off. I think I know how it went on, but when I replaced it, I cannot get the temp below 44 degrees. Doing a Google search, I found several people saying the thermistor must be in contact with the fin, which is not going to happen with this plastic slider. Do you (or anyone else) have a picture of how the thermistor fits in the slider, and the slider on the fin? Right-most fin? etc.
Thanks in advance.
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Old 08-27-2014, 12:30 PM   #15
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Originally Posted by K_and_I View Post
Herk,
I know this is an old thread, but may I resurrect it to deal with a problem I am just having? My DM 2652 always stayed at 36-44 degrees depending on outside temp. On this trip, roads were rough and the plastic slider and thermistor fell off. I think I know how it went on, but when I replaced it, I cannot get the temp below 44 degrees. Doing a Google search, I found several people saying the thermistor must be in contact with the fin, which is not going to happen with this plastic slider. Do you (or anyone else) have a picture of how the thermistor fits in the slider, and the slider on the fin? Right-most fin? etc.
Thanks in advance.
K_and_I
I will get you a pic tonight when I get home. I installed a fan in mine, works great!!!
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Old 08-27-2014, 12:35 PM   #16
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Old 08-27-2014, 12:38 PM   #17
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Thanks- I'll watch for it. I see you're from Michigan. We're in a campground in the Leelaunau peninsula for the week.

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Old 08-27-2014, 12:41 PM   #18
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Thank you for the picture. That is how I thought it should go, but I find that it is not changing the temp no matter where I put the slider.
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Old 08-27-2014, 12:49 PM   #19
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Mine doesn't change much. As I understand it, almost all of them are that way. All the way up, I'd notice drinks start to form ice in the door if I left it closed for 6 hours or so. About halfway down, the ice stopped, but it was still really cold. I've never checked the temps on it. It's possible that it's got a wire damaged or something like that if the temp won't come down and it used to (although it's more likely it would go the other way and be too cold...I'm not really familiar with how a thermistor works).
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Old 08-27-2014, 01:02 PM   #20
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Thank you for the picture. That is how I thought it should go, but I find that it is not changing the temp no matter where I put the slider.
Thanks for helping as I am traveling ATM.
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