My oven is electric and we had it a few years never had any problems but we moved house a few month back and it worked perfectly fine until last week when it went off in the middle of cooking!! I went into the cupboard and the switch had gone on the box thing.... so I turned it back on and my cooker came back on and it cooked the food.... so then again on Sunday we were cooking a joint of meat and after 10 mins it went off again!! It's the switch on the box again. Why might this be happening?