Susan O Scottsdale , AZ December 06, 2014 Appliance: Maytag Gas Cooktop MGC5430BDB20 Maytag Cooktop Mgc5430bdb20: Broken knob. How to replace Top Burner Control Knob. Removed broken knob; replaced it with new one Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes