Dual element switch was defective. Found the part on the Partselect website. Part arrived in several days. Very fast delivery. The replacement switch was quite different from the original, but the schematic diagram on the PartSelect website showed how to connect up the new switch. I am impressed

Remove cooktop and placed on work bench. Removed bottom assembly by removing sheet metal screws. Removed switch bracket and then switch. Scratched head for awhile as replacement switch was quite different from original. Checked schematic on website which showed how to connect up new switch. Reassembled. Wife now talks to me again now that her favorite stove burner is working.