Thermostat
Reads or limits temperature. A failed one can stop the heat or let it run too hot.
High-voltage capacitor
A motor that hums but won't start often needs a new capacitor.
Magnetron
A motor that hums but won't turn, or stops once it's warm, needs replacing.
Micro-switch
Replaces WB24X10075
Door, lid and control switches stop a cycle when they fail.
Fuse holder
Reads or limits temperature. A failed one can stop the heat or let it run too hot.
1ThermostatWB20X10003
2CapacitorWB27X10011
3MagnetronWB27X10585
4Micro-switchWB24X830Part numbers come from the Sears PartsDirect parts list for the GE ZEM200SF01 (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.