Ronald B Soddy-Daisy , TN April 13, 2024 Appliance: General Electric Refrigerator GDE21EGKPRBB Ge Bottom-Mount Refrigerator Gde21egkprbb: Evaporator coil was freezing up every 5 to 7 days. How to replace Defrost Thermostat. Replaced defrost heater and defrost thermostat. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes