Universal Defrost Timer Specifications this Refrigerator Defrost Timer Will Cycle For Twenty-One Minutes After Every Six Hours Of Run Time. Use It For Your Frigidaire/Wci Brand Refrigerator. This Part Works With The Following Products: This Part Works With The Following Products: Refrigerator. This Part Works With The Following Products: This Part Works With The Following Products: Frigidaire, Westinghouse, Gibson, Tappan. Part, 5303917633 Replaces These: Part, 5303917633 Replaces These: Ap2592955,3286Cross Parts: Ap2592955, 3286, Ea468976, 5303917633, Cc351, Ah468976, Cc901, Ps468976, A769