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Made by Frigidaire. Frigidaire brands include Electrolux, Frigidaire, Gibson, Kelvinator, Westinghouse, and others. Electrolux also makes various appliance models for Sears / Kenmore
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Part Number 240356217 (AP3874399) replaces 1163280.
Robert for Model Number FRT21IL4FWO
Answer Hello Robert. You need to get a multi-meter. It sounds like you may have a defrost problem with the unit. Check and see if there is any frost build up on the back wall of the freezer. If so, you will need to test the defrost heater and the defrost thermostat. They should read closed for continuity when cold. You can test this with a multi-meter TJMA-DMT3. I will include a link at the end to assist you how to use the multi-meter if needed. If both parts are good, you will need to replace the defrost timer. Once the problem is repaired, you will need to thaw out the ice on the coils before the unit will operate properly. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html
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Heater-Defrost