Reviewed by Jordan Avery · Last reviewed August 22, 2026
Written by
Jordan Avery Appliance Repair Content SpecialistPublished August 22, 2026Technically reviewed August 22, 2026
Content status:
Reviewed
Error codeF91
ApplianceRange & Wall Oven
Affected model seriesLegacy/general Frigidaire range, wall oven, or combination platform
Quick answer
Door-lock mechanism/switch issue
Model compatibility: Frigidaire has used more than one control platform, so F91 may mean something different on another appliance or generation. Confirm this against your model documentation and record your full model number before acting.
Plain language
What this code means
The control is reporting door-lock mechanism/switch issue. The cycle may not start, may pause unexpectedly, or a latch/door-related function may stay unavailable. The code narrows the problem to a system or circuit, but it does not prove that one specific part must be replaced.A code page is most reliable when the appliance type, model number, and platform-specific service data all agree. Formatting variants such as F10/F010 can represent different control generations. Model number must be checked before board-level diagnosis.
Signs
Symptoms you may notice
the code returns after a restart or at the same point in a cycle
the cycle may not start, may pause unexpectedly, or a latch/door-related function may stay unavailable
the affected function may be disabled while other functions still operate
the appliance may enter a protective state to prevent additional damage
Why it happens
Possible causes
a door/lid that is not fully closed
an obstruction at the latch or chute
a worn lock/switch assembly
loose or damaged wiring
a control-board sensing issue
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
Open and close the door/lid firmly without forcing it
Remove visible items preventing the latch, chute, or seal from closing
Check that the appliance is level and the door is aligned
Power-cycle the appliance once after the obstruction is cleared
Important safety warning. Stop using the appliance and arrange service if you notice smoke, a burning smell, sparking, repeated breaker trips, exposed wiring, uncontrolled heating, water reaching electrical parts, a gas odor, or any condition that appears unsafe.Safety note: Ranges and wall ovens may use 240 V power, high-temperature components, gas connections, and motorized door locks. Do not bypass safety devices or work on energized circuits.
Get help
When to call a technician
A technician should verify the exact Frigidaire model and retrieve the matching service data before testing internal components. Depending on the issue, diagnosis may include wiring continuity, sensor resistance, supply voltage, relay outputs, control-board communication, motor feedback, or configuration checks. Those tests should not be guessed from a generic code list.For persistent F91, professional diagnosis is appropriate after the safe external checks above have been completed.
Seeing this code on your Frigidaire appliance?
Book a repair visit for a clear estimate and approval before any work. Share the full model number and the exact code so diagnosis can start with the right path.
When a Frigidaire wall oven stops working, start with the exact symptom, model number and any displayed code. The goal is to identify the failed system before parts are replaced.C…
On the platform covered by this page, F91 means door-lock mechanism/switch issue. Because Frigidaire has used different control platforms, confirm the model number before treating this as a universal definition.
A single power reset and the user-accessible checks listed above are reasonable. If the code returns, do not repeatedly reset the appliance to mask the issue; diagnose the underlying condition.
Professional service is recommended when the code persists after safe checks, involves internal wiring/electronics, or the appliance shows overheating, burning smells, leakage near electrical parts, tripping breakers, or other unsafe behavior.
References
Sources & references
**Frigidaire Oven Error Codes and Alarms Guide** — official manufacturer support https://owner.frigidaire.com/support-articles/article/oven-error-codes-and-alarms-guide This page paraphrases diagnostic information rather than reproducing service-manual text. Model-specific documentation takes precedence if it conflicts with a general guide.
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