WR51X10055 Sears Kenmore Refrigerator Defrost Heater. Replaces AP3183311, 914088, AH303781, EA303781, PS303781, WR51X10030. Improved from original design for side by side refrigerators - High heat, single tube application. Fits several models of Sears Kenmore refrigerators. Click MORE DETAILS link for specific model coverage.