proform 590hr treadmill not running?

on lower some lower boards there are three dial pots.
IR, Low speed, High Speed.
IR is for body weight compensation
low and high speeds are for what they say.

But I don't think thats your problem.
Stand to the side of your treadmill and push your belt with your foot. Then start the treadmill. If you have worn motor brushes this can kinda jump start it and it may move the belt in a jerky manner. You would need to replace motor brushes and clean the commutator.
If on the other hand your treadmill doesn't start and stops when you quite pushing. Then your motor brushes are totally burnt or you lower control board may be out.
. For further help You can contact me here,
www.mindbites.com/person/214-Mark
or markepeterson@austin.rr.com

Mark Peterson
February 2008