I turn it off and it dings and then later, it comes back on. I tested it twice and both times the dial proceeded to "Stay On." It's out of warranty, I think, but if I had gone away for a few days it would have been on 450 degrees for the whole time. It might have caused a fire. As it was, the oven must have been on all night. At the least, I would like a new dial and I'll put it on myself. I called the company yesterday morning and nobody has called me back yet.