The Defrost Timer is an OEM replacement part for Frigidaire upright freezers. It serves as a crucial component responsible for regulating automatic defrost cycles. Causes of a faulty defrost timer relate to 20,000+ hours of constant exposure to freezer temperatures as low as -10 degrees Fahrenheit. Such extremes can compromise electrical switching mechanisms over prolonged usage periods. Symptoms of a failed defrost timer include: Inability to initiate automatic defrost modes   Excessive ice and frost accumulation inside cabinet Warm areas detected due to impaired fan circulation Diagnostic codes indicating defrosting problems This genuine Frigidaire replacement part is compatible with Kelvinator and some Kenmore units as well.5304518034 (AP6799886) replaces 297318010, 00624727, 00624729, 00626218, 00627159, 00628515, 00628516, 00628517, 08037960, 08037967, 216517400, 216563000, 216744400, 216744500, 4815991, 5304516309, 5308037967, 624729, 628515, 628516, CC301, F000127233, F000129880, F127233, F129880, PS12585793.