Norman G James City , PA March 03, 2017 Appliance: Roper 30" Electric Freestanding Self-Clean Range FES310BW1 Roper Range Fes310bw1: I couldn't adjust the right front burner; it was off or on high no in between. How to replace Infinite Control Switch. Replaced the infinite control switch which took less than 5 minutes. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes