Sometimes the thermal fuses just go!, a surge of power?,maybe one of the ceramic plates has gone, first check the fuse, don't replace with any other ! put the same ampage ie 3 or 5 whatever it is,if it's not the fuse get in touch , i repair them, whatever is wrong i'll get them back to you next day £20 including return post,
regards,
Mark.
mark gourlay
November 2007