Thanks for the OP and other valuable replies. My BOV845BSS started alerting sometime a couple of weeks ago, which may happen when the oven is idle or during heating. I followed the previous solution and switched the on/off button with the c/f one and resoldered some parts of the power board. After I pack the case back, perfect, but somehow the problem still exists. Then I found the issue seems related to the contact. I tried touching the pin of the on/off button and thought maybe the spring played the trick. Then wrapped the spring with the shrinking tube, and ta-da, the problem is gone. Finally, I was happy too early, THE SAME problem came back again. I do believe there are some points that need to be resoldered but couldn't figure out where to go... I am going to order a new panel anyway.
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