My fridge quits working after a couple months. The only fix seems to be unplugging it for a few hours then plugging it back in.
It is not iced over.
I have replaced the main control board.
I have replaced the compressor inverter board.
Each fix fixes it for 2 months (presumably because it involves removing power for a decent amount of time). Then it quits cooling again.
It is a Kenmore Elite all digital. No defrost timer (part of main control board). Temp gauges read out current temp on digital display (that's actually how I know it's stopping cooling as these readings creep up).