Hello Gen,
You don't need a new foot control, open the exisiting one and you will will see a small square thing in the corner called a capacitor, take it out and throw it away, you don't need it, it has fused and that is what is causing the machine to run on, if you need to email me me you can find my email address on any answer from page 25 down, this site no longer allows email addresses to be shown now.
Ken
drivewithken
April 2009