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Somehow a faulty multicooker fell into my hands,
she seemed to show no signs of life and did not react in any way to buttons. I had to disassemble it and after a little digging inside it became clear to me that
manufacturers put special thermal protection, which is designed to prevent a fire in case the temperature rises above 150 - 180 degrees.
Actually, this temperature is determined by a special thermal fuse SF152E - SF188E 
Repair, you guessed it, is very simple and everyone can do it. Here I want to warn against the temptation to simply install a jumper, as this can lead to a fire!