Thanks for
Refreshing my memory, of what I had just done.
I think my manual defrost cleared up the frost, so when I opened it up
this morning, it had not formed much new frost at all.
The "secret" knob has not rotated at all during the last 6 hours.
I've actually been checking it all day, to no avail. It's dead..
I ordered a new replacement timer and will install it next week.
In the meantime, 'Echo' will remind me to do a manual defrost every day.
Leaving the Kill-a-watt inline for now.