What does LG microwave error code F-11 mean?

F-11 means the control board and inverter board lost communication. Unplug for 1 minute and try again. If it persists, professional service is required. Do not open the microwave.

F-11

LG Microwave Error Code F-11 — Inverter Communication Error

Advanced Fix N/A (professional repair needed) No tools needed

What this means

The F-11 error code indicates a communication failure between the microwave's main control board and its inverter board. The inverter controls the magnetron power output. This can be caused by a wiring issue, a faulty inverter board, or a main control board problem.

Alternate codes: F11

Step-by-step fix

1 steps

Unplug and reset

Unplug the microwave for 1 minute, then plug it back in and try using it.

When to call a professional

This error requires professional service. Microwave inverter circuits carry lethal voltage. Do not attempt internal repairs.

Related error codes

F-13

The microwave has detected a voltage problem in the inverter circuit.

Advanced Fix · N/A (professional repair needed)

Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.

Learn more about our sources

Parts you may need

Inverter Board

Part #Varies by model · $60–$150

If the inverter board has failed

Find Part

Links may earn us a commission at no extra cost to you. We only recommend parts relevant to this repair.

Quick Info

BrandLG

ApplianceMicrowave

Error CodeF-11

DifficultyAdvanced Fix

Est. TimeN/A (professional repair needed)