Just moved into a home with a Kenmore range that seems to be smarter then me. I unplugged the unit to test something and when I plugged it back in the digital readout shows an icon that looks like a four on a dice. I'm guessing this is supposed to represent the range top because now, for some reason, I don't have gas flow. It worked before I unplugged it and the oven still works fine. I'm guessing it's some kind of safety feature but I don't know how to reset. Ideas?