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Error code reference

Frigidaire Range Error Code F91

Door motor mechanism failure (F90 to F94 range).

Frigidaire codesFrigidaire range codes
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What the F91 error code actually means

Your oven tried repeatedly to unlock its door after a self-clean cycle but never got confirmation that the door actually unlocked. The control board gave up trying to protect the locking mechanism from damage and is now displaying this error to let you know the door latch system needs attention. This typically means there is a problem with the door latch motor, the small switch that detects latch position, or the wiring connecting them to the control board.

Diagnostic procedure

The full F91 procedure

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1
First diagnostic step
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.
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Most common causes of F91

Ranked by how often they cause this code
  1. 1Damaged or disconnected wiring between EOC and Lock Motor Micro Switch
  2. 2Failed Motor Door Latch assembly
  3. 3Seized or obstructed door latch mechanism
  4. 4Faulty Electronic Oven Control (EOC)

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Questions people ask 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.
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.
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.
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.
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.

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