Barry K Chicago , IL December 15, 2014 Appliance: KitchenAid Electric Built In Oven KEBS277SBL1 Kitchenaid Oven Kebs277sbl1: Broken and missing knobs on my 26 year old kitchenaid wall oven. How to replace Oven Thermostat Control Knob. Ordered new knobs Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes