F1LG Oven — LG Oven F1 Error Code
Oven temperature sensor circuit problem
Severity
Critical
Difficulty
Moderate
Est. Cost
What's Happening
The oven temperature sensor or its circuit has a problem. The oven can't accurately read internal temperature and shuts down as a safety measure. The sensor probe may be disconnected, degraded, or failed.
How to Fix It
Disconnect power for 30 seconds, then restore. If F1 returns, test the temperature sensor probe — it should read around 1,080 ohms at room temperature. Replace the sensor if the reading is significantly off.
Frequently Asked Questions
What does F1 mean on an LG oven?
F1 indicates a temperature sensor problem. The oven can't read its internal temperature and shuts down for safety.
How do I test an LG oven temperature sensor?
Unplug the range, disconnect the sensor at the back of the oven cavity, and measure resistance with a multimeter. It should read about 1,080 ohms at room temperature.
How much does an LG oven temperature sensor cost?
The sensor itself is typically $15–$40. It's one of the easiest and cheapest oven repairs if you're comfortable with basic tools.