Michael S Oran , MO January 12, 2024 Appliance: Kenmore Refrigerator 25370443412 Kenmore Refrigerator 25370443412: Ice buildup on rear panel and ice maker area. How to replace Defrost Heater. Replaced main board. The defrost heater and thermostat. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes