I have a sick welding machine and then hoping somebody out there can help me. I have a five-year-old Miller XMT 304 and the problem goes like this. When I turn the machine on the help six code comes up, the fan comes on medium and runs continuously and after five minutes the code goes away and the amperage and voltage reading start and the fan goes to high speed and won't shut off but now it will also weld I would appreciate some help with somebody could help you figure out what the problem is with my machine.