Frigidaire Oven Error Code F91

F91 indicates that the oven's door lock motor has exceeded the maximum number of unlock attempts without successfully completing the unlock cycle. This fault is associated with the motorized self-clean door locking system and involves the lock motor, lock switch, and door switch circuits. The control board throws this code to stop repeatedly commanding a failing unlock operation.

It depends on whether the door lock is stuck in the locked position. If the oven door is locked and will not open, do not attempt to force it open, and discontinue use until the lock mechanism is repaired. If the door is unlocked and opens normally, standard baking functions may still work, but running a self-clean cycle should be avoided until the fault is resolved.

Repair costs vary depending on the failed component. A replacement door lock motor assembly typically ranges from roughly 50 to 150 dollars in parts, while a lock switch or door switch is generally less expensive. Adding professional labor, total repair costs commonly fall in the range of 150 to 350 dollars, depending on the technician's rates and the exact parts required.

A reset may temporarily clear the F91 code if the fault was caused by a transient electrical glitch. Press the CLEAR key first, and if the code returns, turn off power to the oven at the breaker for 30 seconds before restoring it. If F91 comes back after the reset, there is an underlying mechanical or wiring issue that needs to be diagnosed and repaired.

Start by pressing the CLEAR key, then perform a 30-second power reset at the circuit breaker. If the code persists, inspect the wiring and connectors for the lock motor, lock switch, and door switch circuits for damage or loose connections. If the wiring is intact, the lock motor assembly or lock switch likely needs to be tested and potentially replaced by a qualified technician.