GE Range Error Code F91x

F91x means the oven's door lock system lost its Unlock-Home signal from the cam switch while the door was locked during a self-clean cycle. The control board monitors this signal continuously to confirm the lock motor is in the correct position. When the signal drops out unexpectedly, the control attempts to jog the motor by cycling the relay several times before displaying the fault code. This indicates a problem with the lock motor cam switch, its wiring, or the motor itself.

Normal baking and cooking functions may still be accessible depending on the state of the lock, but you should not attempt another self-clean cycle until the fault is diagnosed and repaired. If the door is still physically locked following a failed clean cycle, the oven interior will also be very hot immediately after the attempt, so allow adequate cooling time before trying to free the door. Continuing to run self-clean cycles with a faulty lock mechanism could worsen the failure.

Start by inspecting the lock motor cam switch for any loose connections, physical damage, or signs of failure, and test it for proper continuity through its range of motion. Next, check the wiring harness running from the lock motor to the RPSM J16 connector for any open circuits, broken wires, or unseated connectors. Keep in mind that during a fault condition, the control board will cycle its relay multiple times attempting to jog the motor, so watch for any partial movement of the lock mechanism during this process as a clue to where the failure is occurring.

You can attempt a reset by disconnecting power to the range for several minutes, which may clear the code if the fault was caused by a temporary electrical interruption. However, if the cam switch, wiring harness, or lock motor has a real mechanical or electrical defect, the code will return the next time a clean cycle is started. A reset is a useful first step but is not a substitute for diagnosing the underlying cause.

Repair costs vary based on which component has failed. A replacement door lock motor assembly typically ranges from around $40 to $120 for the part alone. If professional service is required, labor costs generally add $80 to $200 or more depending on your area and the complexity of the repair. If only a wiring connection is loose, the repair may cost little to nothing beyond a service call fee.