I went through the Appliance Parts Pros video titled "Freezer is Cold & Refrigerator is Warm". The first thing I noticed was that the evaporator fan (behind the duct opening at the top rear of the freezer compartment) wasn't turning. It spun freely when I moved it by hand, and it still didn't start after the freezer compartment was warm and free of ice. This model has an all-in-one digital control board, so I couldn't do the defrost timer tests. I unplugged, tested continuity on the defrost thermal switch and the defrost heater coil using a multimeter. Both were fine. I unplugged the evaporator fan motor and tested continuity: it measured as an open circuit. To make sure that the controller was trying to run the fan, I left it unplugged and tested the voltage on the wires coming from the controller, with the multimeter set to measure Volts AC in the 200V range. The output was 120V AC. Clearly a working controller board and a dead fan motor. I purchased a factory replacement evaporator fan motor. I pulled the plastic fan blades off the old motor and pressed them onto the new one, installed it and everything now works as it used to.