Stuart M Minnetonka , MN June 30, 2018 Cold on bottom room temperature on top I replaced the defrost thermostat and the defrost timer. That fixed it. I think the thermostat is what failed but replaced both because they’re the most likely to fail. AppliancePartsPro is a great website. The videos are super helpful. I’ve fixed other appliances with parts. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes