the most likely scenario is that something is inside the oven that should not be there. and that causes the fire. say you bake something, and then leave it insi

the most likely scenario is that something is inside the oven that should not be there. and that causes the fire. say you bake something, and then leave it inside to cool off, and then turn the oven back on forgetting that there is still something inside. so turning on should only be possible while you can actually see what is inside.