F98
LG
Main Control Board Internal Error
LG oven shows F98 and may not heat or may behave erratically.
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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
Corrupted control firmware, Power surge damage, Internal PCB failure
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before any disassembly.
- Power reset: Turn the breaker OFF for 10 minutes, then ON. Sometimes a full reset can clear transient control errors.
- Check power supply: Verify the range is receiving correct voltage (typically 240 VAC for electric ovens). Low or fluctuating voltage can trigger control errors.
- Inspect control board: Remove the rear panel and inspect the main control board for visible damage.
- Replace control board: If F98 persists after reset and power verification, replace the main control board with the correct LG part number.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Oven Control Board (ERC/PCB)
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