Electrolux side by side fridge/freezer, about 15 years old, came with the house when I bought it.
Twice in the last week it has started beeping overnight, due to a "temp top high" alarm. Freezer compartment readout was 6 degrees above set point. Fridge side at or near set point.
Cleaned the coils tonight, which 9nvolves pulling fridge out of cubby, removing a cardboard panel, unplugging it. The vacuum and damp cloth. Coils weren't that bad, but cleaned them anyway.
When plugging the fridge back. In, it makes all the poses I'd expect, the fan starts normally, the compressor kicks in, and the beep alarm sounds, because of the power outage. All normal. Then, literally 1.5 seconds later, all sounds stop, for 3 seconds, as if the plug was pulled. Then it starts up again, just as before. Starts, stops, starts, stops over and over without a change, until I u plug it again.
I checked, and when it powers down, the interior lights shut off too.
Checked houses fuse panel, no issues there. Ran extension cord to different outlet, no change. Opened it back up and looked for loose wires or anything, but nothing.
Internet seems to indicate main control board most likely.
What does beyond say? Is this fixable? What's next step in diagnosis? Is it new fridge time?
I'm going to bed, will read responses in the morning.