I have had this mm 220 white face for about 10 years with never a problem till now. I was welding on high range with the selector switch on 1 and the splatter shorted out in the nozzle to the tip and blew the breaker. I reset the breaker and when I press the trigger the contactor just clicks real fast and blows the breaker. I called Miller service line and the rep told me it was the contactor. I replaced the contactor and it still does the same thing and is really burning up the contactor contacts. If I try to hold the contactor in when pulling the trigger it sounds like a dead short. Welder sounds like it straining. Any ideas thanks.