Ge Fridge Frosting Up In The Back Of The Freezer.

I have a GE side by side fridge and lately it has been frosting up in the back of the freezer section and does not stay cold in either the freezer or the refrigerator.  I cleaned the back as it was dirty and turned it off and opened the freezer door.  At first it woujld not come on at all.  I defrosted it some more and now the motor came on but it's not blowing very cold air.  What do you think is the problem?  I checked the drain line in the bottom back and the hole seems to be open.  I checked in the back of the fridge when I cleaned it and took off the rubber hose and it seemed okay as well.  I Googled this problem and it appears many people are having the same problems with their refrigerators.  Why doesn't GE recall these if everyone is experiencing the same expensive problem?