Snag wrote in
rec.crafts.metalworking on Thu, 7 Oct 2010 15:58:07 -0500:

Might be the infinite heat control ...

That would be my guess. Can you disconnect it and try it then?
You say fuses, but to you mean circuit breaker? They can go bad over
time, and they are built to open rather than not open.
--

Dan H.
northshore MA.