Raymond M Port Richie , FL January 15, 2017 Appliance: Magic Chef Free Standing Gas Range 3121WRW Magic Chef Range 3121Wrw: Oven thermostat not working. How to replace Thermostat. Your CO. sent me the parts i requested. That solved the problem; thank you. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes