After some intermittent TIG welding on a project, the arc will not start anymore. I get HF but no arc at all. The overcurrent light turns on and stays on as soon as I try to strike an arc in any mode and with any settings. Foot pedal, torch switch makes no difference. Power cycling the machine resets the light but attempting to initiate an arc will light it back up. Leaving the machine unplugged overnight didn't help either. If I can duck out of work early during the week, I'll try calling tech support. Funny thing, I just posted yesterday about the robustness of the 250EX. Halfway through my project... what a drag!

Tom