I have a Siemens Double oven, Model HB30D50U/03 and have been getting the error code F111. This started a short time after the use of the self clean cycle of the upper oven. I have had the main circuit board repaired and the oven will turn on, heat to a temp of 350 degrees Celsius, then stop after 15 minutes with the F111 error code. I have shipped the circuit board on different occasions to two different US companies for it to be repaired, with no improvement. Are there any other suggestions? Is it possible to locate the Siemens part no. 00489250? The Bosch oven of this same part number is NOT equivalent as the wiring is different. Thanks for any advice or help.