Brent W Alamo , CA January 08, 2016 Appliance: General Electric Gas Range ZGU385NSM1SS Ge Cooktop Zgu385nsm1ss: Bad igniter switch on stove. How to replace Cooktop Mounting Screw. I was able to replace the switch harness with the new one. It was fairly simple and straight forward. I usually take a photo of the scene before I start so I have a reminder as to where everything goes if I get distracted. Also gave me an opportunity to clean the stove parts. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes