LG · Microwave

LG Microwave F5 error code

Difficulty: Hard · Cost: $80–$250 · Duration: Requires professional service

The F5 error means your LG microwave has detected a problem with the damper switch — the component that controls the vent damper which opens and closes to manage airflow and steam ventilation inside the microwave cavity. When it fails the microwave cannot manage ventilation correctly. There are no user steps to resolve this error and the unit requires a professional repair service to inspect and replace the faulty damper switch.

Common causes

Damper switch has malfunctioned or failed completely
Damper mechanism is physically stuck or obstructed
Wiring connection to the damper switch 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 F5 returns after resetting the damper switch needs inspection and replacement by a qualified technician