Recently the was a noise eminating from the rear of the unit when the fan was running. The fan has stopped running now and the lower sections of both the refrigerator and freezer are way too cold. To the point that the lower section of the refrigerator might as well be my freezer because everything has frozen. Unfortunately, the top sections of both the refrigerator and freezer are not cold at all. In the freezer section the upper section could pose for the refrigerator. Cool but nothing frozen. Please help.

While I haven't checked the fan as of yet. The noisy fan was definitely in the freezer area. When you opened the freezer door, the noise was much louder.