Ron H Sherwood , MI June 01, 2019 Appliance: Whirlpool Refrigerator WRT519SZDM00 Whirlpool Refrigerator Wrt519szdm00: Frig wasn't staying cool and freezer was icing up in the back. How to replace Evaporator Motor. I first defrosted the freezer then replaced the thermistor. The frig and the freezer worked for a bit but froze up again. So then I ordered the evap motor. Fixed the problem. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes