yep, open the foot pedal via the bottom plastic plate. inside there are two crews that control the stops of the potentiometer. manual explains it much better.
if it was an issue of the wheel never stops or never starts - usually it's resulting after you drop the foot pedal - usual cause is either the plastic lever inside has somehow slipped off the potentiometer's lever arm, or the two plastic tabs on the main arm have broken off and no longer move the potentiometer. I have both of this fault happen at least once a year on my Brent wheels.
this pic pretty much shows all the parts:
- LeeU likes this