I am experienceing tyhe same exact issue. I enterred the same model number for my thermador range which by the way wa awesome for about 5 years then began to suck. I have repaced my control panel/board 4 times, the oven glass twice, the elements in the oven twice, and the downdraft once. Its absurd. now I havent been able to clean the oven in months due to failed locking mechanism. I ordered a new locking servo/mechanism from Appliance parts pros who have been great in the past for my dryer. I followed the exact wire number instructions...th only vairience is #14 on te faded xerox is actually #15 on my range. I have the same issue...turn on power and its in perpetual clean mode. the fan runs nothing else will work. it says "lock" and the fan continuously turns on and off. I have tried countelss wiring combinations. nothing works. Evewn when I revert back to the old locking mechanism it says lock and wont work. If this fried my board, I'm going to file suit. wtf. Can someone please advise? I have invested way too much into this down draft stove. its absurd.