ErrorCodeDoctor
LG Microwave F11 error code
The F11 error means your LG microwave has detected a communication fault in the inverter — the component that controls and regulates the power delivered to the magnetron for cooking. When communication to the inverter fails the microwave cannot control cooking power correctly and stops operating. There are no user steps to resolve this error and the unit requires a professional repair service.
Common causes
- Inverter communication circuit has malfunctioned or failed
- Wiring between the inverter and the main control board is loose or damaged
- Inverter board has developed a fault
How to fix it
-
1
Disconnect the microwave from power for about a minute and plug it back in to attempt a reset
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2
If F11 returns after resetting the inverter needs inspection and replacement by a qualified technician
Related LG Microwave error codes
F11 error — frequently asked questions
What does the F11 error mean on a LG microwave?
A communication error was detected in the inverter
What causes the F11 error?
The F11 error is usually caused by: Inverter communication circuit has malfunctioned or failed; Wiring between the inverter and the main control board is loose or damaged; Inverter board has developed a fault.
Can I fix the F11 error myself?
This is rated a hard fix — it often requires tools, parts, or experience, and may be safer left to a professional technician.
How much does it cost to fix the F11 error?
Fixing the F11 error on a LG microwave typically costs $100–$300, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my microwave with the F11 error?
We'd recommend addressing the F11 error before continuing to use the microwave, since hard-rated issues often involve a real fault rather than a minor glitch.