Somehow the electric connection had fallen out of the bracket. Had to disassemble and reassemble some bits but really, maybe 3 months of mild irritation and in the end it took maybe 20 minutes to fix. There’s a lesson I don’t want to learn somewhere in there…


It’s possible for the switch behind the knob to fail. They’re called selector switches or rotary switches (https://duckduckgo.com/?q=stove+rotary+switch). In my case, some plastic from the casing melted and became a conductor, so the element could not be turned down or turned off. This is also an easy replacement.
Turn off the breaker, unplug from outlet, open up the back of the stove/oven (take a pic or mark the wires to remember where they go), remove the offending switch and look for a model number on it so you can search for and order a replacement online. All I needed was a phillips screwdriver. You can still use the rest of the stove top elements without the broken switch until your replacement arrives.
Good to know, thanks!