Auger problem

I was not sure of where to post this but...I have a YS640 thats about 3 years old. Love it. Recently when the auger would run it would emit an occasional squeak. The other nite when I went to start up the fan turned on and displayed U26, then hit start and a 4 flashed before the 350 rising display and the auger did not turn. Before I dig in any ideas of what I am dealing with? Thanks. Jeff