Monica B Corte Madera , CA August 17, 2014 Appliance: Thermador Electric Wall Oven CT227N-01 Thermador Wall Oven Ct227n-01: The knobs on our thermador ovens model # ct227n broke and they are no longer being manufactured. How to replace Knob Kit, Universal Elec. We ordered this universal knob kit, and they worked. They don't look as good as the old ones, but for less than $10 they have allowed us to avoid replacing our ovens just because the knobs don't work. 14 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes