leave it to samsung for their product to fail on the day warranty expires.  the oven started making the loudest noise and it needed a new motor and fan.  the appliances were just okay as brand new, but all of my appliances from samsung fail after a year or two.  also the dual heat doesn't work. i would have one section set to 350 and one to 450 and i use internal oven thermometers and they both read 430, 435 so neither were correct and the heat transfers between sections, which is not great when trying to bake. this is a har pass for this oven.