Hi, I have a 5 Y.O. Thermador 36" pro harmony that is starting to throw a E6100 code during pre-heat. The code and subsequent oven shut off seems to happen as the coolng fan starts(about 3/4 of the way during the pre-heat phase) Once the oven shuts off, I can hit enter and start the pre heat SOMETIMES, and once the oven is up to temp, the code stops. I've tried shutting the breaker to the range for an hour or so, and that doesn't seem to help. I'd welcome any input on the problem.

Thanks.