I'm not sure of the age of this unit but I am guessing 5-10 yrs, there is a maintenance date of 6/2007 on the back in marker, at least I assume that's what it is. Anyway, the symptoms are fridge not cooling, freezer appears to be working. Freezer makes and keeps ice frozen still. I turned off fridge for a few hours and restarted and it cooled for another week then stopped. Took back panel off and coils do not appear or feel iced over. The defrost pan is dirty and dusty with no signs of recent water. Do not feel any air coming into fridge but the fan is running fine in the back. Having trouble trying to locate the control board or the area where air should be coming into the fridge. Model #ABC2037DTS

Any help appreciated, thanks, Andrew.