Hi Steve I had this problem a few years ago also. Is it an old model? Mine is model 45. I found this advice for the foot pedal "The suppressor in the control has blown, it looks like a fuse, take it out and discard, they are not needed these days." It works fine.
Martine
Martine
June 2020
"I've measured the resistance of the capacitor and it seems open circuit, but this should not stop it from working."