LG · Microwave

LG Microwave F1 error code

Difficulty: Hard · Cost: $100–$300 · Duration: Requires professional service

The F1 error means your LG microwave has detected a problem with the main control board. The main board controls all functions of the microwave — when it develops a fault the unit cannot operate safely. There are no user steps to resolve this error and the unit requires a professional repair service to inspect and replace the faulty main board.

Common causes

Main control board has malfunctioned or failed
Internal fault detected on the main board circuitry

How to fix it

1

Unplug the microwave for 1 minute and plug it back in to attempt a reset
2

If F1 returns after resetting the main control board needs inspection and replacement by a qualified technician