Richard T Brookville , IN November 06, 2014 Appliance: Model RT18VKXJWOO The freezer was getting an ice build up along the rear panel and the motor won't stop I went to You tube and plugged in the problem and found it was the defrost bimetal. I pulled the rear panel and sure enough the piece was coming a apart. So I ordered a new one . The replacing took about 20 minutes and now it runs fine. 51 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes