F91
LG
Door Lock Not Engaging
LG oven displays F91 and will not start a self-clean cycle.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Misaligned door latch, Weak door lock motor, Faulty door lock switch, Obstruction preventing latch from closing
How to Fix / Troubleshooting
Safety first: Disconnect power before accessing mechanical parts.
- Check door closure: Verify the door closes fully and the latch engages smoothly. Adjust hinges if the door is sagging.
- Inspect latch strike: Examine the latch strike on the oven frame for bending or damage. Straighten or replace if needed.
- Test lock operation: With panels removed, observe the lock motor while attempting to start a clean cycle (power ON, use caution). If the motor hums but does not move, or does not run at all, replace the lock assembly.
- Clear obstructions: Remove any debris or buildup around the latch area that could prevent full engagement.
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Repair Difficulty
Medium
3/5
Required Part
Oven Door Lock Motor Assembly
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