F31
LG
Over-Temperature in Control Area
LG oven displays F31 and may shut down or not start, often after long cooking times.
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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
Failed cooling fan, Blocked ventilation around oven, Faulty thermal sensor near control board, Control board overheating
How to Fix / Troubleshooting
Safety first: Turn off power and allow the oven to cool completely before servicing.
- Check ventilation: Ensure the oven has proper clearance per LG installation instructions. Remove any items blocking vents at the rear, sides, or front.
- Inspect cooling fan: Access the internal cooling fan and verify it runs during oven operation. If not, test and replace the fan motor as needed.
- Clean vents: Remove dust and grease buildup from intake and exhaust vents using a vacuum and soft brush.
- Control area inspection: Remove the control panel cover and check for signs of heat damage around the control board. If components appear discolored or warped, replace the control board.
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Repair Difficulty
Medium
3/5
Required Part
Oven Cooling Fan Motor
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