>Where people work, who have to empty a fridge before it can be remotely defrosted.
replyYou don't empty a fridge with built-in defrost. Your home fridge defrosts itself every 12-24 hours and you don't have to do anything.
Normally, the temperature recovers in ~1 hour after a defrost. The attack is apparently chaining manual defrost commands one after another so that the interior gets way too hot.
Could it be that it defrosts only by raising the temperature for a few hours just a bit to get the same effect and they food stays there?
replyThat's way the non-smart walk-in coolers work; every 12 hours they turn off the fans and heat the cooling element for about 15 minutes to melt any ice that's built up on it.
replyIce anywhere else is treated as a separate problem and turning the cooler off to fix it is not typically an available option.