Sensor
Replaces WB21T10017
Reads or limits temperature. A failed one can stop the heat or let it run too hot.
Magnetron
A motor that hums but won't turn, or stops once it's warm, needs replacing.
Light bulb
Replaces WB08T10007
The light bulb this model takes.
Monitor switch
Replaces WB24X0830
Door, lid and control switches stop a cycle when they fail.
High-limit thermostat
Reads or limits temperature. A failed one can stop the heat or let it run too hot.
Turntable motor
Replaces WB26X0172
A motor that hums but won't turn, or stops once it's warm, needs replacing.
1SensorWB21X22134
2MagnetronWB27X10516
3Light bulbWB08T10023
4Monitor switchWB24X830Part numbers come from the Sears PartsDirect parts list for the GE JKP86BF3BB (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 oven door: the plate is on the frame or the side trim.