Error code reference

Frigidaire Range Error Code F91

Door motor mechanism failure (F90 to F94 range).

Frigidaire codesFrigidaire range codes

Door motor mechanism failure (F90 to F94 range).

First step from the service manual

Press CLEAR key. If that does not eliminate the problem, turn off power for 30 seconds then turn on power. Check wiring of Lock Motor, Lock Switch, and Door Switch circuits.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for F91.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What F91 means on a Frigidaire range

F91 on a Frigidaire range indicates the Electronic Oven Control (EOC) attempted to unlock the oven door the maximum number of times and never received confirmation that the unlock was successful. The EOC monitors the Lock Motor Micro Switch to verify door latch position. When the switch never signals a successful unlock state after repeated motor drive attempts, the board logs F91 and stops trying to prevent mechanical damage. The fault points directly to the communication path between the EOC and the Lock Motor Micro Switch, or to a failed Motor Door Latch assembly.

For homeowners, this code typically appears after a self-clean cycle finishes. The range tries to unlock the oven door automatically, but something in the locking mechanism is not responding correctly. The door may remain physically locked even though the cleaning cycle is complete. This is a mechanical and electrical issue with the door latch system, not the oven heating components.

The first diagnostic step is inspecting the wiring harness between the EOC and the Lock Motor Micro Switch for loose connectors, broken wires, or heat damage near the latch assembly. If the wiring is intact, the Motor Door Latch assembly itself is the likely failed component and will need replacement.

Source: manufacturer service documentation.

Common causes of F91

  1. 01

    Damaged or disconnected wiring between EOC and Lock Motor Micro Switch

    Wiring / connection

    If the wiring harness connecting the EOC to the Lock Motor Micro Switch is broken, pinched, or has a loose connector, the EOC cannot receive the signal confirming door unlock. This causes the board to retry until it hits the maximum attempt limit and triggers F91.

  2. 02

    Failed Motor Door Latch assembly

    Part replacement

    The Motor Door Latch assembly contains both the drive motor and the micro switch. If the motor fails to move the latch or the micro switch fails to detect the unlocked position, the EOC never receives a success signal and F91 is logged.

  3. 03

    Seized or obstructed door latch mechanism

    Wiring / connection

    Grease buildup or physical debris around the latch cam can prevent the latch motor from completing its travel, which means the micro switch never reaches its unlocked position and the EOC logs F91 after maximum retries.

  4. 04

    Faulty Electronic Oven Control (EOC)

    Part replacement

    If the EOC is not correctly driving the latch motor circuit or is misreading the micro switch signal due to an internal board failure, it may log F91 even when the latch hardware is functional. This is the least likely cause and should only be considered after confirming the wiring and latch assembly are in good condition.

See the test procedure for each cause

Frequently asked questions about F91

What does the F91 error code mean on a Frigidaire range?
F91 means the Electronic Oven Control exceeded the maximum number of attempts to unlock the oven door. The EOC drives the Lock Motor Micro Switch to confirm the door latch has moved to the unlocked position, and F91 is set when that confirmation never arrives. This nearly always happens after a self-clean cycle.
How do I fix the F91 error code on my Frigidaire range?
Start by inspecting the wiring harness between the EOC and the Lock Motor Micro Switch for loose connectors or damaged wires. If the wiring is intact, test the Lock Motor Micro Switch for continuity in both latch positions. If the switch or motor is not functioning correctly, replace the Motor Door Latch assembly as a unit. After any repair, run a short self-clean cycle to verify the door locks and unlocks correctly.
Can I still use my Frigidaire range if it's showing F91?
The oven door may be physically locked when F91 is active, which would prevent normal cooking use. Surface burners on a gas or electric range are typically not affected by the door latch fault, but the oven itself should not be used until the latch system is repaired. Using the oven with a latch fault can leave the door stuck locked or unlocked during future cycles.
How much does it cost to fix F91 on a Frigidaire range?
A replacement Motor Door Latch assembly for a Frigidaire range typically costs between $40 and $90 for the part depending on the model. If you are doing the repair yourself, that is the main cost. A professional technician will add a service call fee and labor, bringing the total to roughly $150 to $250 in most markets. Wiring repairs, if the harness is the only issue, are less expensive than a full latch assembly replacement.
Why is my Frigidaire oven door still locked after the self-clean cycle and showing F91?
The oven door stays locked because the Motor Door Latch assembly either did not complete its unlock movement or the Lock Motor Micro Switch did not signal a successful unlock to the EOC. The control board retried the unlock sequence the maximum number of times and gave up, logging F91. Check the wiring to the micro switch first, then test the latch assembly motor and switch before replacing the full assembly.

Related Frigidaire range codes

All Frigidaire range codes
View all 186 Frigidaire range codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass