As per the title, I have a brand new portable induction cooktop that isn't running right (it ignores the temperature setting, and the real power consumption is far lower than the power number indicated on the display), and on disassembly I found a variable resistor on the main circuit board.
I've indicated it on the attached image, which I took from an aliexpress listing of a circuit board that looks similar to mine (original link here).
I tried turning it and going counterclockwise didn't seem to do anything. Going full clockwise reduced the power consumption on turn-on from 1060W down to about 850W and made the high-pitched noise of the coil whine a little louder - both times with the display indicating the default setting of "1600W".
FWIW the induction cooktop is a Royalty Line EIP 2000. It claims 2000W of power but my inline power meter never measured more than 1500W (with the display indicating "2000W"). After adjusting all the way clockwise it draws 1200W with the display indicating 2000W.
I've indicated it on the attached image, which I took from an aliexpress listing of a circuit board that looks similar to mine (original link here).
I tried turning it and going counterclockwise didn't seem to do anything. Going full clockwise reduced the power consumption on turn-on from 1060W down to about 850W and made the high-pitched noise of the coil whine a little louder - both times with the display indicating the default setting of "1600W".
FWIW the induction cooktop is a Royalty Line EIP 2000. It claims 2000W of power but my inline power meter never measured more than 1500W (with the display indicating "2000W"). After adjusting all the way clockwise it draws 1200W with the display indicating 2000W.
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