Hi there, had the same problem with my original Bradley. I ended up replacing the sliding potentiometer on the circuit board attached to the bottom plate. The toughest part was to find the equivalent component, which was a Delta B110k ohms (from china). I ended up selecting a Bourns (stock at Mouser Electronics) model PTA4543-2210CIB104. It fitted perfectly in the holes on the circuit board.. Took 5 minutes to weld. Works perfectly. I had to do an epoxy repair on the cracked front bottom panel, took 10 minutes.
Smoked salmon and Ribs taste terrific.
Good luck.