Hi my name isXXXXX have been an appliance repair tech since 1992. The thermo fuse is located behind the wall oven and could cause this issue. If it opens up, it will shut off all power. And the fact it worked while resetting the break as you stated, it may also be a defective control board. The control board is part#(NNN) NNN-NNNNbut the manufacture Whirlpool has discontinued the part.I can help you diagnosis it if you can pull the unit out from the wall and have an ohm/volt meter. The thermo fuse is available but the control is not. Those are the only two things that could cause this issue you are having. Please let me know, thank you.
Thanks for your timely response! I'm not sure I'd be able to get to the back myself (get the unit out of the wall - it's built-in), so I'm not sure I can do without professional help here. On the control panel - you say it's not longer available - I saw something online (Sears parts) about a replacement/substitute control panel. Any info on that? And - if it's not available, does that mean we just have to replace the whole thing? Just making sure I'm clear on the options.
Thank you for the great on-target analysis. We had a repair person in yesterday and, yes, it was the fuse you mentioned. They've ordered the part, and we hope to be back in business within a few days. Thanks again! Brian Croswhite