LG Oven f3 error code
A keypad key has been shorted for more than 60 seconds. The oven thinks a button is being held down continuously.
Also shown as: f3, F3
Last updated: October 6, 2026
What causes the f3 error?
- A key physically stuck down
- Spills or moisture under the keypad
- Defective touchpad membrane
- Cleaner damage to the panel surface
- Failed control board
How to fix LG f3 — 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. Temporary key shorts often clear. - Find the stuck key
Press each key on the panel one by one. A key that feels different, sits low, or does nothing is the culprit. - Clean the panel correctly
Wipe with a cloth dampened with water or mild cleaner. Spray the cloth, not the panel, and never use ammonia-based glass cleaner directly on it.
When to call a technician
- F3 returns after reset and cleaning
- A key is physically jammed
- Several keys are dead or misbehaving
- The touchpad needs replacing
Frequently asked questions
Why does cleaner cause F3?
Sprayed cleaner seeps under the touchpad membrane. Heat then breaks the membrane down and shorts the keys.
Can I still cook with F3 showing?
Usually not. The oven ignores commands while it thinks a key is held down.
How do I prevent this?
Spray cleaner on the cloth first, wipe spills quickly, and keep steam away from the panel.
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.