Hey I have a 280 amp 3 phase Lincoln I have went through a few torches in the last year or 2 I was welding heavy awhile back with a cheap lead and it melted at the welder and where it goes onto the welder, I bought a parweld one it and it has melted one of the connections inside and now when you press the button nothing happens. I am assuming they should not heat up at the welder so can anyone shed some light as to why it is and how to stop it thanks.