I still have the same problem (the refrigerator side of my kitchenaid, model KSS048FMX02, Refrig/freezer will not get any cooler than 49 or 50 degrees). The freezer works fine. In order for it to get down to 50 degrees, the unit has to be kept in the " Max Cool" cycle. This is accomplished by re-pushing the " Max Cool" button every 24 hours, which is the length of time of that cycle. If it is not in the "max cool" cycle the refrigerator will stop cooling and warm back up to 60 or 62 degrees. I taped a few narrow strips of tissue paper in front of the cold air outlet to check for air flow. There is some airflow but it is minute.
I've defrosted the refrigerator and I had a Sears serviceperson check the problem. He tested the fan motor, the sensor, the defroster element and ran the self-diagnostic test that was built in to the control system. He found nothing wrong. He turned the entire unit off then on and told me to wait 24 hours before putting food in. Since I had done all of this before, except for running the diagnostic test, I knew this was BS. Anyways, 24 hours later the refrigerator was still only registering 60 degrees. 48 hours later, it was still 60 degrees. After that, if I kept it in "Max cool" it would cool down another 10 degrees or so.
What sticks in my mine is the fact that when I took the cover off the evaporator you could see that the fan kept trying to turn but the blade could not make a full revolution. I checked the blade and it was unobstructed and free to rotate. I have tried to find a complete wiring schematic for that model but all I can find are generic versions showing general wiring schemes. Do you have any ideas where I can get a wiring diagram and/or what is wrong with the air circulating system?
I have rescheduled the repairman to try again tomorrow.