Surface element light on when all are off.

I raised the stove top to verify with a volt meter that electricity was truely going to the elements and which ones were receiving current. I removed the back panels to gain access to the controls and wiring. After checking the circuitry with the volt meter I determined that one of the thermostatic controls was defective. I ordered a new control and 8" burner (which showed signs of deterioration) from PartSelect and received them the next afternoon. It took less than an hour to reassemble.