when you open up the machine and look inside at the back of the switch were all wires connect there should be a serial number/type, with that and the help of mr google u should be able to find replacement.The identity code will be on the part of switch nearest to machine front. It might be easier to 1st unplug the machine then undo 4 screws +the knob that hold switch in place on front of machine + carefully inspect the switch from the inner side of machine.take photos if you can for future referance