Freezer works refrige doesnt - Dometic RM2852 Refrigerator

Sounds like the thermistor is bad. Several ways to test.

1: Place the end of the thermistor that is located inside the refrigerator into a glass of slushy water and read the ohms resistance on the plug end which is located on the back of the refrigerator. Google the ohms resistance chart for Dometic thermistors and compare your readings to the chart. If they are not in range then the thermistor is bad and needs to be replaced.

2: Unplug the thermistor from the circuit board. It will be the harness that has only two wires going into a hard plastic plug. Leave it unplugged for 24 hours and check the temp inside the refrigerator. If the temp has dropped then the thermistor is bad and needs to be replaced.

To replace the thermistor remove the thermistor sensor end from the plastic clip. Remove the plastic grommet from the back wall of the refrigerator. Tape the new plug end to the sensor head of the old thermistor and gently guide it through the hole. Once the taped head/plug passes through the hole you may complete pulling the new thermistor through from the back side. Only pull enough to allow you to plug the new thermistor in. Un-tape the plug end from the head and plug the thermistor in to the circuit board. Reinstall the cover over the circuit board and reinstall the access pane. There will be some sealing putty on the old thermistor harness. Remove that and gently press it back into the hole around the new thermistor harness inside the refrigerator and reinstall the plastic grommet. Install the sensor end into the plastic clip and install the plastic clip between the first and second fins. The higher up on the fin the colder the temp will be inside the refrigerator.