Nate Nagel writes:

Never mind... I think I just answered my own question. The MOV, which
I'm pretty sure what I'm looking at, in the dishwasher, shows no
continuity when probed with my trusty Fluke, so that should not prevent
the dishwasher from functioning (but *would* leave it without surge
protection.) So I ASSume that something else is also fried on that board.

Check for a blown fuse. Sometimes the MOV is downstream from a fuse,
with the intent that the MOV will absorb small surges, and blow the fuse
on large surges that the MOV cannot absorb. If you're lucky, replacing
the fuse might have it running again.

But more likely something else is fried. If the MOV is the only thing
destroyed, the rest of the circuit would work, and you could just
replace the MOV at your leisure. The fact that the circuit doesn't work
suggests that the overvoltage was too much for the MOV and it probably
took out one or more other voltage-sensitive devices too.

Dave