CTG51 was smelling the correct rat. Yeah, I've already ordered the replacement timer, but that doesn't appear to be the problem. I masked the real symptoms by the order in which I did things.
1) Cleaned the condensor coils.
2)Turned the fridge/freezer off.
3) Emptied the freezer and removed the panels covering the evaporator; found the evaporator was frozen up.
4) Manually defrosted with a blow dryer.
5) Couldn't find the dang Ninja Timer, fridge still off, but freezer defrosted.
6) Eventually found the Timer, then unplugged the unit per Samurai's instructions, before messing with the Timer. Manually advanced Timer to the CLICK, then got out my temperature gun and shot the Heater Wires. Got a reading of @ 60F, so I assumed the Heater Wires were functioning.
7) The Timer turned everything back onto normal.
So, I read around 30 F on the evaporator coils, but 60 F on the heater wires, on a unit that had been unplugged while I messed with the Timer. Re-doing the test this morning, neither the Evaporator nor the Heater Wires ever got up over 30 F during the defrost cycle, This is probably because yesterday I had a defrosted unit which had been unplugged for a bit, so the heater wires were reflecting more of the air temperature in the empty freezer with the door open and no ice on the evaporator coils (therefore, 60 F). Today I did it without unplugging, without manually defrosting, and the wires more closely reflected the temperature of the ice on the coils!
It's gotta be the dang Heater Wires, not the Timer! So, now I gotta order the wires and return the replacement timer.
Thanks for making me puzzled enough to re-run the test and find the flaw in yesterday's effort.