Sorry, I wasn't clearer, my plug wasn't arcing like the example...just the general issues with the contactor de-energizing. I have the wiring diagram in the other response, and it's all that can be found, unfortunately. fairly useless. But I'm almost 100% certain the guts were never touched...until I started playing electrician..:-/.. I bought this from the original owner who barely used it over the years.If the plug was arching then it is probably the root of the problem not the contactor. Also use the drawing that was sent with the machine. If your machine does not match the book then someone likely changed something. To best repair the machine, restore the wiring to match the drawing in the book.