Brian M Chester Springs , PA February 13, 2023 Ice build up no coil defrost. I replaced the defrost thermostat and heating coil. The refrigerator/freezer is operating. Time will tell to see if it freezes up. AppliancePartsPros.com videos and parts won the day. Thanks 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours