"Rick Maston" wrote in message
om...
I've got a Lincoln Square Wave 175 Tig welder. Today the foot pedal
was acting up. Sometimes the pedal would respond and sometimes not. I
checked the ground to the welding table. The arc would sometimes stop
in the middle of the weld.It seems to me the problem is in the pedal.
At times I needed to throttle the pedal to get an arc started. The gas
solenoid is responding. Do foot pedals wear out?

Yes.
You have a single range foot switch? Or the Foot Amptrol?