Magnetron
A motor that hums but won't turn, or stops once it's warm, needs replacing.
Light bulb
The light bulb this model takes.
Switch
Replaces 5304467694
Door, lid and control switches stop a cycle when they fail.
1Magnetron5304467693
2Light bulb5304440031
3Switch5304493153Part numbers come from the Sears PartsDirect parts list for the Frigidaire FGBM185KFA (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.