Donald H Rosemead , CA September 12, 2019 Ice build up in freezer blocking airflow to frig The wire harness with the sensor fixed the issue. The sensor had broken which I assume prevented defrosting. I also replaced the styrofoam defuser to ensure proper airflow. The original was falling apart. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes