So I have a dead spot in the middle of my tig foot pedal travel.

What causes this? Is it the main pot. that is driven by the belt?

I read that there is a 47 and 50K pot pedal depending on models. My tig is a 200dx. Safety checked in 2012 reading from a sticker on the back of the machine.

If it is the pot I will replace with another. How many watts are the pots?