Fix error codes F90, F91, F92, F93 and F94 on a Frigidaire range

Oven door lock issues can be frustrating for homeowners. Fault codes F90 through F94 all pertain to problems with the electronic oven control (EOC) properly locking and unlocking the oven door. If you encounter any of these codes, this guide will walk you through the necessary troubleshooting steps to diagnose and repair the issue.

F90 – Maximum oven door unlock time exceeded

The F90 fault code indicates the EOC sent the unlock command but the oven door failed to unlock within the maximum allowed time.

Potential causes include:

• Faulty door lock motor assembly – The motor may fail to engage and rotate the lock cam to the unlock position.
• Obstruction preventing lock mechanism from moving – Binding of the lock cam, rod, or switches can prevent proper motion.
• Defective door lock switches – If a switch fails to open or close properly during the unlock cycle, it will prevent completion.
• Wiring issue between EOC and lock motor – Damaged wires or loose connections can cause communication problems.

F90 Troubleshooting steps

1. Visually inspect the door lock mechanism with the oven door open. Activate a lock/unlock cycle and watch for any binding, jamming, or obstruction.
2. Check the lock motor, cam, and rod operation by manually cycling the lock mechanism. Replace the motor assembly if any components fail to operate smoothly.
3. Verify the door lock switch wired to the EOC is functioning properly and opens/closes with each lock/unlock cycle. Replace if faulty.
4. Check wiring between EOC and lock motor assembly. Repair any damaged wires or loose connections.
5. If the above steps fail to resolve the issue, replace the EOC.

F91 – Maximum oven door unlock attempts exceeded

The F91 fault means the EOC tried to unlock the oven door more times than allowed without success.

Likely causes include:

• Obstructed door lock mechanism – Foreign object or debris blocking proper function.
• Defective door lock motor – Motor fails to drive lock cam/rod to unlocked position.
• Faulty door lock switch – Switch failing to signal unlocked position back to EOC.
• Damaged wiring – Loose connections or breaks in wiring harness.

F91 Troubleshooting steps

1. Check for any obstructions in the door lock mechanism. Remove foreign objects or debris.
2. Verify proper operation of the door lock motor and replace assembly if required.
3. Check function of the door lock switch that signals the EOC. Replace faulty switch.
4. Inspect wiring between EOC and lock components for damage. Repair as needed.
5. If the problem persists after the above steps, replace the EOC.

F92 – Maximum oven door open time exceeded

The F92 fault occurs when the oven door stays open longer than allowed while the oven is active.

Potential causes:

• Obstructed door hinge – Debris blocking door from fully closing.
• Defective door hinge – Worn out or damaged hinge component.
• Faulty door light switch – Switch failing to close when door shuts.
• Loose door switch connections – Preventing proper circuit closure.

F92 Troubleshooting steps

1. Check oven door hinges for any obstructions. Remove debris blocking door motion.
2. Inspect door hinges and repair/replace if worn out or damaged components are found.
3. Test operation of oven light switch. Verify it closes properly when the door shuts. Replace if faulty.
4. Check door switch wiring connections. Reseat or repair any loose wires.
5. If the fault remains, replace the electronic oven control.

F93 – Maximum oven door lock time exceeded

The F93 fault signifies the EOC sent the lock command but the oven door failed to lock within the maximum permitted time.

Potential causes:

• Obstructed door lock mechanism – Foreign object or debris blocking motion.
• Defective lock motor – Motor failing to drive lock cam/rod.
• Faulty door lock switch – Not signaling locked status back to EOC.
• Damaged lock circuit wiring – Loose connections or broken wires.

F93 Troubleshooting steps

1. Check for any obstructions of the door lock mechanism. Remove any foreign objects.
2. Test the lock motor and replace the assembly if required.
3. Verify proper operation of the door lock switch signaling the EOC. Replace the faulty switch.
4. Inspect the wiring between the EOC and lock components. Repair any damage.
5. If the problem remains after the above steps, replace the EOC.

F94 – Maximum oven door lock attempts exceeded

Fault F94 indicates the EOC tried to lock the oven door more times than permitted without success.

Potential causes:

• Jammed door lock mechanism – Debris or damage preventing locking.
• Defective lock motor – Failure to drive lock cam/rod.
• Faulty door lock switch – Not signaling locked status to EOC.
• Damaged wiring – Loose connections or broken wires in harness.

F94 Troubleshooting steps

1. Check for any obstructions or damage to the mechanical door lock components.
2. Verify proper operation of the door lock motor and replace if faulty.
3. Check the door lock switch signaling the EOC and replace if not functioning correctly.
4. Inspect the wiring between the EOC and lock components. Repair any loose or damaged wires.
5. If the issue continues, replace the electronic oven control.

Additional information

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The information in this article may not apply to your specific appliance model. We recommend consulting your manufacturer’s documentation or contact us with any questions.