This General Electric Defrost Control Timer For Refrigerator is compatible with General Electric, Hotpoint, Kenmore, RCA brands. Part #wr9x489 replaces PS310858, WR9X427, WR9X469, WR09X0427, WR09X0469, WR09X0488, WR09X0489, WR9X488, 2578, AP2061695. This refrigerator defrost timer runs a defrost cycle for 35 minutes after every 16 hours of run time. Melts away the ice that has accumulated over the evaporator coils to promote efficient cooling.