Dometic refrigerator DM2872

[LGLichter]

I purchased a 2021 Flagstaff Micro-Lite 25BRDS. The refrigerator cools to ~42degF when running on LP but only cools to ~60degF when running on electric. All the fuses and breakers are OK, even the ones behind the cover on the back of the refrigerator. There is power to the AC plug. This fridge only runs on LP and AC. It is set to "AUTO" which defaults to AC when AC is available. The fridge lite illuminates but the fridge is warmer than the outside temp (50 degF). There is one unlabeled fuse in the fuse box, fuse position 11 (very bottom), is this used for the solar option (wired but not installed)? Does anyone know why the fridge won't cool below 60degF when running on electric?

 

[Bob K4TAX]

Well, there is an electric heating element which my come out of position on the boiler. Could be low voltage of the 120 VAC type. Might check the voltage at the outlet where the refrig is plugged in. Check the position of the temperature sensor on the fins on the inside back. There is also a trouble shooting procedure in the manual. Electric heating elements can be replaced.

I find that LP does cool better than electric.

Bob

 

[LGLichter]

Couldn't find anything on the electric heating element in the manuals (user manual + installation manual). Did find a parts breakdown "Dometic DM2872 Product ID #: 958703821 Parts List".
There is definitely 120VAC at the power cord, both 5A fuses are good in the control box. Temp sensor is positioned at the coldest setting. I believe the temp sensor is good because it runs fine on LP. There is no exhaust fan on this unit. I don't know how to bypass the 120VAC heating element (#281) on the parts list and have no idea what this part provides.
Fridge did get down to 50degF over night....but that is the same as the outside temp.

 

[LGLichter]

Another parts breakdown link:
"Dometic DM2872 Product ID #: 958703821 Parts List"
My fridge DM2872 Product ID#: 936003252.

 

[Aussieguy]

use a multi meter to measure voltage at the breaker panel and at the FRIDGE's wiring box

If the voltage is LOW cooling performance can/will be affected.


It should be 120v +/- 5%

 

[bikendan]

Moved thread from the General Community Discussion section to the Appliances and Electronics sub-forum since the OP's questions are specific to Appliances and are not general community questions.

 

[LGLichter]

Found the Dometic spec on the 120VAC Heater ......48ohms cold.
"Dometic 8 & 9 Cubic Foot RV Fridge" My Heater element measures "open".
Heater Element Part# 3850644422....~$70.00 new from RV Part Shop....~$18 on Amazon.

 

[tomkatb]

We can have the same issue on our four door model. Leaking seals. Our left door is very hard to properly close. Re adjusted it today.

I would put a flashing light/stobe in the fridge at night in the dark. Maybe a serious seal leak will show up. Ours has always been wiggy!

That is how ours acts.

Second. If installed in a slide you need substantial air movement in the back. We have three fans. No, all companies do not include the fans.

 

[Bob K4TAX]

Found the Dometic spec on the 120VAC Heater ......48ohms cold.
"Dometic 8 & 9 Cubic Foot RV Fridge" My Heater element measures "open".
Heater Element Part# 3850644422....~$70.00 new from RV Part Shop....~$18 on Amazon.

Good troubleshooting. Thanks for posting.

Bob