Hi sarah, it could be the mains filter,it will trip the electric when you turn the mains on.It could be wiring has shorted or heater open circuit.I would say the mains filter is favourite.This part is at the rear where the mains wire enters the machine.You may have had a burning smell earlier.It is not really an easy diy fix and may be best an engineer fix it.Hope this helps put them in the right area.All the best.
Foxy
August 2008