Newton S 265 , NY May 29, 2017 Appliance: Model MAGIC CHEF NS280 Refrigerator not cooling opened the freezer and there was ice buildup Checked the defrost heater and it was burnt, ordered a new one and just to be safe also ordered a new defrost timer and thermostat. The refrigerator is now running perfectly. 8 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes