LG Range Error Code F11

F11 on an LG range means the oven detected no heating during preheating. The control board monitors whether the oven temperature rises above 150°F within the first 5 minutes of preheating with the door closed. If the temperature stays at or below the starting temperature during that window, the board triggers F11 and stops the heating cycle. This points to a problem with the igniter, gas valve, oven sensor, or their wiring.

You should not attempt to use the oven while F11 is active. The code indicates the oven is not heating as intended, and the underlying fault could involve the gas valve or igniter. Continued operation attempts without resolving the fault could pose a safety risk. The stovetop burners may still function normally depending on the specific failure, but the oven should be kept out of service until repaired.

Resetting the range by unplugging it or cutting power at the breaker for a few minutes may temporarily clear the F11 code, but it will return as soon as the oven attempts to preheat if the underlying fault has not been fixed. The error is condition-based, meaning the control board re-evaluates heating performance every time the oven runs. A reset is useful for confirming the fault is active and repeatable, but it is not a repair.

A knowledgeable DIYer can perform the initial diagnostics, including checking wiring connections and testing the oven sensor for continuity. However, testing and replacing the gas valve or igniter involves working with gas components, which carries safety risks and may require a licensed technician depending on local codes. If wiring inspection does not resolve the issue, professional service is recommended for gas system repairs.

Repair costs vary depending on which component has failed. A replacement igniter typically costs between $20 and $80 for the part alone, while a gas valve can range from $50 to $150 or more. Adding professional labor, total repair costs generally fall between $100 and $300 depending on the component and your location. Oven sensor replacement is usually on the lower end of that range.