Freezer not maintaining proper temp.

A few possibilities here. The fan motor in the freezer could be stalling, or the drawer could be sticking open, or you could be seeing it in the defrost cycle. the freezer on these sub-zeros have a defrost cycle that is electronically controlled, so it should not warm up that much (or hardly at all) I would say you ought to get a servicer out there right away, and see if you can track any sort of cycle or particular time it happens before they come. the sub zero service phone # is on the door frame on the upper left corner inside the freezer. If there are no servicers in your area, sub zero will do whatever is neccesary to remedy the problem. I work for an authorized sub zero servicer and they go to great lengths to keep their customers happy. Good luck!

I think you might be just seeing the cycle.. it comes on reaches 0 stays off for awhile and kicks back down to 0.... wouldnt be to concerned unless it stays there