The last four of my unit is 0910... The wires that connect to the element have a reputation for having crappy connectors and wire. I have had mine running pretty much 2-3 times a week for 1.5 years. The first time it quit I was able to clean them and get new connectors and drive on. This time the element and wires burned up. I called MB and the element is on back order for 30 days.... So I cleaned what was left of the element and cut the wires back and cleaned them. Wrapped together and soldered. Then duct taped evreything and put it back together. It works... Before..