Capacitor
Replaces 5303319549
A motor that hums but won't start often needs a new capacitor.
Magnetron
Replaces 5303319556
A motor that hums but won't turn, or stops once it's warm, needs replacing.
Switch
Replaces 5303319558
Door, lid and control switches stop a cycle when they fail.
1Capacitor5304470539
2Magnetron5304480636
3Switch5304493153Part numbers come from the Sears PartsDirect parts list for the Frigidaire FMT118E1P0 (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
Open the door: the label is on the frame. Over-the-range models: sometimes behind the vent grille.