I have a Range master Professional 90, purchased in 2006. I moved here 13months ago. Some times when the main oven is used it trips the electrics, only able to reset electrics with the main oven is switched off. Have checked stat, element & wires at the rear. Is there a possible failure with the switch & it's wiring. I will soon have to remove the top to inspect further. Any help is welcome. Thanks Graham F..