Help! Domestic Refrigerator not getting cold.

I agree with midnighsadie. Try switching from AC to propane and see if it will cool down. Where do you have the settings at. On the Norcold 1200 LRIM best setting on the knob is on six, but if you want colder you go up in the numbers, not down. I would also check the thermister on the fins. Slide it up about half an inch and it should cool down.

I just noticed on your post the word Domestic? Are you telling us that it is a Dometic refrigerator? If it is I am not sure how the settings work on Dometic refrigerators. Not sure if they are like the Norcold.