Door gasket
Replaces 216522312
Leaks, a torn edge or a door that won't seal mean it's time for a new one.
Chest freezer run capacitor
Replaces 218909913
A motor that hums but won't start often needs a new capacitor.
Light bulb
Replaces 216846400
The light bulb this model takes.
Door switch
Door, lid and control switches stop a cycle when they fail.
Sec, gasket
Replaces 216524200
Leaks, a torn edge or a door that won't seal mean it's time for a new one.
1Door gasket5304507199
2Run capacitor5304464438
3Light bulb5304517886
4Door switch216822900Part numbers come from the Sears PartsDirect parts list for the Frigidaire FFU21C4CW2 (view the list), checked November 15, 2026. Amazon buttons open a search for the part number; we may earn a commission.
Where the model number is
Upright freezers: inside, on a side wall near the top. Chest freezers: on the back or on the side near the lid hinge.