Michael M Midland , MI March 01, 2019 Appliance: Kenmore 25 Side By Side Refrigerator 59657542790 Kenmore Refrigerator 59657542790: Freezer side was not staying cold enough, auto defrost was not working well as evidenced by frost on evaporator. How to replace Defrost Timer Kit. Diagnosed that the temperature controller was not working correctly. Their auto defrost and auto defrost timer were working. I decided to replace all three since the unit was Old. Everything is now back together and working correctly. Do-It-Yourself Rating: Repair Time Estimate: 2+ hours