My Pelonis oil-filled space heater temperature range setting failed a few days aho.
I removed the trim panel to get at the knob; the knob was too large to remove otherwise. The trim panel was VERY brittle plastic. Screws very hard to remove, Had to break off tabs to remove from slots holding it in place. Not designed to be taken apart. Knob shaft was split with part broken off. Epoxied the part back on and wrapped with heavy thread and epoxied the thread. Put back together, breaking more of trim panel when replacing main screw holding it. On/off light didn't work. Tore apart again. Could see nothing wrong with LED. Re-assembled. Still no light. Next day returned it to bedroom. Light works again??? Seems to all work OK but knob movement feels a bit mushy. Oh well. All's well that ends well?
Such chores keep me out of mischief in my old age. Also saves buying a new heater. Maybe.