We had gotten error codes F2 and F3 which would then shut down the oven. We've read that these codes apply to the temperature probe or wiring. Now the codes have stopped and the oven will heat to 335 or so slowly ..it appears only the top heating element is working. I replace the bottom element about 6 months ago as it had broken in half in one place and was obviously no longer working. The oven worked fine after that replacement until last week when the error codes started. My question ...is it the temperature probe, the heating element (again) or something else. I also noticed that it appears the fan located at the rear of the oven is not working ...at least I see no blade movement at all when the door is opened (and understand that it shuts off when the door is opened ...but would think there would still be some slow down movement. What steps / parts would you suggest. Thanks, Dave