James P Charleston , IL November 22, 2017 Appliance: Whirlpool Refrigerator ED20TKXDN01 Whirlpool Refrigerator Ed20tkxdn01: Whirlpool side by side neither side would stay cold open door and tap control panel and the unit would start to cool again check later and its 60 degrees inside. How to replace Defrost Timer. Installed new temperature control unit and Defrost timer in the control panel within the refrigerator portion. Temperature control unit was the most difficult between the two as the capillary tube install and the installation of the temperature probe being the most time consuming, WITHOUT KINKING TUBING. BE CAREFUL. After installation, unit is working like a new side by side. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours