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tedp's avatar
tedp
Explorer
Jun 01, 2015

Dometic Automatic Refrigerator Temperature Control

Our "new to us" motor home has a Dometic RM2652 frig installed. On our first trip we noticed that the frig will run continually and freeze everything. I tried moving the thermistor down to no avail. Is there any aftermarket product to install to correct this product or do I try just replacing the thermistor?
  • Moving the Thermister will ONLY change the temp in the refer about 4 degrees. So, IF you do not like the preset of 38 degrees. Moving to get it colder will only result in about a drop to 34/35 degrees. The adjustment on a Auto Temp Dometic does not change the temp that much. So, if the refer is sub 33 degrees, then you have a control problem(usually bad Thermister), not an adjustment problem. Doug
  • filthy beast wrote:
    This past week while camping our fridge kept getting colder. I tried sliding the thermistor down (warmer) to stop this. That is when I noticed that the thermistor did not move with the clip. When I pushed it back into the clip the temp increased and stabilized. Unfortunately it would continue to creep up. I am going to contact Dometic and try to find out where in the clip the thermistor should be and glue it into that position.


    IF you glue it then that is it.........no adjustment at all.

    Dometic is going to tell you......
    Tip (bulb) of thermistor should just stick out of top of clip
    Clip should go on far right fin...mid position
    Then after 24 hrs.....check food section temps.
    Adjust thermistor as needed>>>>>>>>>>>>>

    BUT they will NOT tell you to glue clip in place
  • This past week while camping our fridge kept getting colder. I tried sliding the thermistor down (warmer) to stop this. That is when I noticed that the thermistor did not move with the clip. When I pushed it back into the clip the temp increased and stabilized. Unfortunately it would continue to creep up. I am going to contact Dometic and try to find out where in the clip the thermistor should be and glue it into that position.
  • Thermistor is what thermostat uses to sense food compartment fin temp. The t-stat preset to control 38*F-42*F (fin temp 10*F colder)

    Moving thermistor/clip UP----COLDER
    Moving thermistor/clip DOWN---WARMER
    But moving it will only make minor adjustment (4*F-6*F) and you need to wait overnight to see affect.


    IF placement of thermistor has no affect..then thermistor is bad. Can replace whole thermistor/wiring harness with OEM

    Or 'Snip-The-Tip' one which has a rheostat knob to make fine adjustment
  • One dealer told me that was "normal" as most folks want to have a really cold refrigerator for their weekend beer. Not.

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