I have a problem on my Electrolux oven, it trips the mains and blows the 13amp plug fuse, happens everytime i turn the ignition knob, there is a slight spark by the knob before tripping. Model EOG600WN. Can the Micro switch behind the ignition knob be the cause if it was to fail!!! Do these switches fail?? r is the problem elsewhere??

SAM, January 2011