This part works with refrigerators. The 5304518034 can replace the following part numbers: 00624729 216744500 5304516309 And more 5304518034 Refrigerator Defrost Timer The 5304518034 Refrigerator Defrost Timer is responsible for regulating how often the cooling element in a refrigerator is heated to melt the frost that has formed on it. The timer turns on the refrigerator's defrost heater at regular intervals. An old or malfunctioning defrost timer can lead to complications with the refrigerator. Your refrigerator defrost timer might have to be replaced if: Your refrigerator or freezer is too warm Your freezer will not defrost Frost has built up on the freezer coils