Leslie C Thibodaux , LA August 21, 2018 Appliance: Roper Refrigerator RT14DKXFN00 Roper Refrigerator Rt14dkxfn00: Refrigerator would not go into the defrost cycle, therefore the rear wall of the freezer was frozen over and the frig was warm. How to replace Timer. Replaced the defrost timer and my frig is back to working properly. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes