I replaced all four (4) ignition switches, four (4) igniters, and the one (1) spark module. It was a relatively simple fix (parts cost > $300) that avoided me from having to buy a new $2,000 cooktop. If you embark on the journey to fix the ignition system, order ALL parts (and don't try to fix only one burner). The process and labor to remove the cooktop, open it up, clean things up, etc. almost demand a complete overhaul of the complete ignition system. When I installed all the new parts, the burner igniters worked perfectly!