Baichun S Edison , NJ May 21, 2017 Appliance: Model SAMSUNG REFRIGERATOR RS264ABSH/XAA Defrost not working Follow the video, separate the heater and sensors from the evaporator assembly, and replace the broken heater with new heater along with new sensors. The video is really helps. It took me about 2 hours to finish the job. I think most people can do it with the video guide. Do-It-Yourself Rating: Repair Time Estimate: 2+ hours