Got a call to fix Admiral side by side, maybe twenty or thirty years old. Not defrosting. The fellow had the heater and termination stat replaced a couple years ago, so it's a known issue.
The unit had the old "flex tray" ice maker. I mentioned this. He had not used it in years. I offered to take it out. After all, I'd taken out GE and Whirlpool ice makers, to free up some more space.
He called back a couple hours later. had finished cleaning the unit, and plugged it back in. Did not run. I went back, and find that I had to replace both the flex tray and also the motor that drives the ice auger, to get the refrig to come back on. Strange wiring, I guess.
As the gentleman commented "no good deed goes unpunished".