LG · Microwave

LG Microwave F3 error code

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

The F3 error means your LG microwave has detected a problem with the control panel. The control panel is how you interact with and program the microwave — when it develops a fault the unit cannot accept inputs or operate normally. There are no user steps to resolve this error and the unit requires a professional repair service to inspect and replace the faulty control panel.

Common causes

Control panel has malfunctioned or failed
Internal fault detected in the control panel circuitry
Wiring between the control panel and main board is loose or damaged

How to fix it

1

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

If F3 returns after resetting the control panel needs inspection and replacement by a qualified technician