Just some additional information for what it's worth: I have a DM2852 refrigerator and was curious awhile back on what effect the thermistor resistance had on the control board operation.
In Auto mode with 120V AC power applied to the refrigerator, I attached a Fluke DVM to the terminals providing power to the boiler electrical heating element.
Disconnecting the thermistor from the control board, I attached a variable resistor to the control board thermistor connector and measured the following:
At 8.2K ohms, the control board switched ON the 120V to the heating element. (Starts the cooling cycle)
At 10.0K ohms, the control board switched OFF the 120V to the heading element. (Ends the cooling cycle) There is an audible click when the control board's relay is energized/de-energized.
According to the resistance range for a dometic thermistor, a value of 8.111K equates to a temperature of 37F and 10.223k ohms equates to about 29F.
Also understand that the cooling fins in the refrigerator compartment must cool below the desired compartment temperature in order to keep the compartment itself at the desired temperature.
Here's a link to the dometic thermistor value range
https://www.arprv.com/dometic-thermistor.php