Carlton C Elizabeth Cty , NC November 02, 2025 Appliance: Jenn-Air Electric Downdraft Surface Unit C221-C Jenn-Air Cooktop C221-C: One burner would not turn on & the other burner when turned on could not be adjusted off of the max setting. How to replace Radiant Cartridge (Black, Designer Line). Replaced the burner on the one that wouldn’t turn on and replaced the thermostat on the one that couldn’t be adjusted. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes