LG Oven f9 error code
The oven failed to heat up. After 5 minutes of preheating with the door closed, it still had not passed 150°F. On gas models this usually means a weak igniter.
Also shown as: f9, F9
Last updated: October 6, 2026
What causes the f9 error?
- Weak or failed oven igniter (gas models)
- Failed bake element (electric models)
- Faulty oven temperature sensor
- Gas supply issue
- Failed control board relay
How to fix LG f9 — step by step
Work through these in order, from simplest and safest first. Stop as soon as the code clears.
- Power reset at the breaker
Turn the breaker off for 1 to 2 minutes, then back on, and try preheating again. - Check whether it gets warm at all
Start a bake cycle and carefully feel near the door after a few minutes. Stone cold points at the igniter or element. Slightly warm points at a weak igniter or sensor.Safety warning: Do not touch inside the oven. Just check for warmth near the door. - Confirm the gas supply (gas models)
Make sure the gas shutoff valve behind the range is open and other gas appliances work.Safety warning: If you smell gas, do not touch anything electrical. Leave the area and call your gas company.
When to call a technician
- The oven never heats at all
- The igniter glows but there is no flame
- You smell gas at any point
- F9 returns on every preheat
Frequently asked questions
My gas oven glows but never lights. Is that F9?
Yes, that is the classic weak-igniter symptom. The igniter glows but does not draw enough current to open the gas valve.
Can I replace the igniter myself?
It is a common DIY part reached by removing the oven floor, but it involves gas and electricity. If you are unsure, call a technician.
Does F9 mean the oven is broken?
It means it failed to heat this time. A weak igniter or dead element is a routine repair, not a dead oven.
Sources
Every meaning and fix above was checked against official manufacturer documentation:
FixCode provides general troubleshooting information only — not professional repair advice. If you are unsure about any step, stop and call a qualified technician. Repairs done incorrectly can be dangerous and may void your warranty.