Michael M New Braunfels , TX October 24, 2021 Appliance: Whirlpool Refrigerator WRS588FIHZ00 Defrost heater failure. I changed the bimetal defrost thermostat, and the heating element and it worked like a champ! Read More... Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes Tools: Screwdrivers, Socket Set