Michael for Model Number ET8LFKXKQ01 I am considering the bi-metal defrost thermostat being the problem. The coil in the back wall of the freezer compartment totally ices up. The icemaker production slows down and both the refrigerator and the freezer are not as cool as normal. After turning the unit off and defrosting everything, including the ventilation tube the scenario repeated itself after a few days. I can advance the defrost timer manually and the unit shuts off. During this period I can detect no noise indicating a thawing process, and it seems the only time the unit shuts off automatically is when the temperature dial is raised to the warmest position.
Answer Hello Michael, I'm assuming that when you force the unit into defrost at the defrost timer it is cycling itself back out of defrost by itself. If not, the defrost timer isn't advancing and will require replacement. If it is then the defrost thermostat or the heater are the main concerns. The thermostat cannot be tested unless it's below about 25°F. In this state it will be closed, (zero resistance). Also, this defrost thermostat WP4387503 has the epoxy top so you should examine it carefully as if the epoxy is protruding from the metal cup, it has been contaminated with moisture and requires replacement. Let me know if I can assist you futher. Read More... Answered by AppliancePartsPros.com | Thursday, April 5, 2012