I have a Beko KS530S with a solid-plate electric hob. All of the hotplates are operated by knobs numbered 1 to 6. Two of the hotplates have a booster function. One of these does not heat at all on settings 1 to 3, but does work on 4 to 6, though the heat up time is not much faster than the same size hotplate without the booster function.
Reading other posts on here and searching online I can’t find the exact same problem described, but suspect from what I have read that it is a fault with either the switch or the regulator. Any help in understanding this better would be very welcome.