I conferred with a service man who told me how to reset the Hi-limit on the
lower oven which would not heat after using the self cleaning feature.
Open the lower door and remove the vent where the latch is. I took out four screws and then had to take off the top oven door to get the other
three screws. There is a small round device with a red button. Push the
button in all the way and that's it. The oven works now.