Kohidad, since my freezer gets to -13 degrees (which I think is well below what it should be)do you think it would still be a problem with the fan and outside coils? Everything looks clean (I keep the coils clear with compressed air) and warm air is being moved by the fan when the compressor is on. It seems the ability to cool gets stopped somewhere between the freezer and fridge.
Jim, Thank you for your recommendation of Nova Kool. If I can't figure out a fix for this unit, the next one will NOT be a Dometic! Northstar now has a lower and upper external vent similar to what is required for an absorption fridge. There isn't a lot of extra space on the sides of the fridge within the cabinet. Certainly not to the specs shown in the install manual. I believe these units can be mounted without any external venting (on a boat for example) if there is sufficient airflow on all sides. I'm guessing the upper and lower external vents on my unit probably allow enough airflow.
Thanks again for everyone's thoughts and suggestions. I really like many aspects of the compressor fridges, but service and knowledge about them has been challenging.