Dometic Refer Too Colg

As Sandia Man indicates the problem could be a bad thermistor. Higher than normal resistance will call for more cooling. You can check to it to see if it does need replacement:

Turn off all power to the refrigerator.

Remove the cover from the control box on the rear of the refrigerator.

Locate the thermistor wire. It will be exiting the inside of the unit in the upper left corner and attaches to the control board in the upper left quadrant. There will be a 4-wire connector on the control board just above the two wire thermistor connector.

Detach the thermistor wire connector from the control board.

Inside the refrigerator, detach the thermistor from the cooling fins and dip it into a glass of ice water (a glass full of ice cubes with just enough water to cover them). Leave the thermistor sensor in the ice water for about two minutes.

At the other end of the thermistor (at the control board in the rear) measure the resistance between the two wires in the thermistor cable. It should read between 7,000 and 10,000 ohms if the thermistor is good. Any higher resistance indicates a bad thermistor (according to Dometic), although higher resistance will call for more cooling. Low resistance will cause the unit to not cool properly; high resistance will cause it to overcool.

I've noticed that my Dometic does that also but only when it's near empty. Once full the temps settle into the mid to high 30's. Of course mine is a different model (side by side) but still similar.

When our Dometic started freezing everything in our fridge and moving plastic sleeve that contains thermistor up or down on fins didn't produce any results I ended up replacing it with this snip-the-tip adjustable thermistor. Here's a video on it's installation. Took care of problem and it can be adjusted if you need more or less cooling. It is set for about 34-35 degrees as it comes.