I used the oven at lunch yesterday and turned it off when I was done but later in the day I noticed it was real hot aroung the stove. The temp readout on the panel was blank but the bottom heat coil was glowing red. I had to turn off the breaker to turn it off, there are two spots on the coil that look like weld spots and it still comes back on by itself when you turn the breaker on. After pulling the heating coil there is a hole burned through the bottom of it