Report "Open circuit?? I have a millermatic 210 with what seems like a open circuit problem because the tip is always hot even when the trigger is not pressed if there is any excess wire sticking out of the tip when finished with a weld and it touches any grounded surface it arcs back into the tip I checked all the ground connections and changed the liner the tip, gas diffuser but it still has the same problem. Any help in this matter would be great"