The oven will not turn off, it cools to about 280 degrees. I unplugged the range overnight and plugged it in the next morning and it started heating up again. I was boiling potatoes on the right rear glass burner while baking a casserole in the oven. The potatoes boiled over, I don't know if that may have shorted something out. It made a noise as if electricity and water had mixed together. Could you advise on what to check or what part may need to be replaced? Thank You!