Hello, I have an airco dipstick 160 that I bought about a year ago and I did a cosmetic restoration. When I had the welder apart, I took the contactor points out and they were arced over pretty bad , and I sanded them down nice and smooth. So recently, when mig welding, my welder would only weld about every other time I pull the trigger, the other half off the time, the wire won't energize. So I took the contactor back apart, and the points look really bad again. Is this a sign of a failing coil inside the contactor?