I bought this welder from a widow which her husband owned. I went to use it tonight and no arc? There is a reset/ trip button on the back but i cannot tell if it has tripped. The button appears to be loose not proud or sprung as if it popped. But on the other hand i cannot push the switch in at all it is just motionless. I dont know if that is correct and i would only be able to push it in when it trips. Anyone know?If it hasnt tripped any ideas why no arc? Turns on like it wants to weld but nothing? I am welding a car part but i also tried a large very clean bolt in case the part paint was in the way of my ground. still nothing.Im a new guy and appreciate the help! -John