LG Oven f1 error code
The oven temperature sensor circuit is open. The oven cannot read the temperature, so it will not heat.
Also shown as: f1, F1
Last updated: October 6, 2026
What causes the f1 error?
- Failed oven temperature sensor probe
- Broken sensor wire
- Loose sensor connector
- Corroded connector pins
- Failed control board
How to fix LG f1 — 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 oven breaker off for 1 to 2 minutes, then back on. If F1 was a glitch, it clears now. - Visually check the sensor probe
Look at the sensor probe sticking out of the oven's back wall. Check for obvious damage, heavy corrosion, or a probe that has come loose.Safety warning: Make sure the oven is off and cool before looking inside. - Note when the code appears
If F1 shows immediately at power-on, the sensor circuit is open. If it appears mid-cook, note that for the technician.
When to call a technician
- F1 returns after a power reset
- The sensor probe looks damaged
- The connector is corroded or loose
- The oven never heats
Frequently asked questions
Can I use the oven with F1?
No. The oven will not heat without a valid temperature reading, which is a safety feature.
What does the sensor look like?
A thin metal rod, a few inches long, mounted on the inside back wall of the oven.
Is F1 the same as F2?
No. F1 means the sensor circuit is open (broken connection). F2 means it is shorted.
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.