Yep. All that is good to know "IF" a person;
A. Understands it.
B. Has the tools and knowledge to put it "on the nose".
C. Owns better than a Harbor Freight genney.
The rest will either zap their boards or find another way to heat until power comes back.
They went far beound nessary safty provisions years ago. I trust thermocouples,flame roll-out,high limit devices and see transister boards overly redundant and failure prone. Adding insult on top of it is that half the so called repairmen are clueless about troubleshooting electronics so they install parts until it starts working again.