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Error code reference

LG Range Error Code F11

No heating

LG codesLG range codes

No heating — starting oven temperature does not exceed 150°F and oven temperature is less than or equal to starting temperature over 5 minutes during preheating while door is closed.

First step from the service manual

Check electric wiring, gas valve resistance (~1-1.5Ω), igniter resistance (45Ω-400Ω), and oven sensor.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F11 means on a LG range

The F11 error code on an LG range indicates a no-heat condition detected during oven preheating. Specifically, the control board monitors oven cavity temperature at startup and expects to see a rise above 150°F within a defined window. If the oven temperature fails to exceed 150°F from its starting point, and the temperature reading remains at or below the starting value over a 5-minute preheating period while the door is closed, the control triggers F11. This tells the board that no meaningful heating is occurring, which points to a failure somewhere in the heating circuit.

On a gas range, the heating circuit involved in F11 includes the gas valve, the igniter, the oven temperature sensor, and the associated wiring. The gas valve should measure approximately 1 to 1.5 ohms of resistance across its coil terminals. The igniter resistance should fall between 45 ohms and 400 ohms. An igniter reading outside this range, particularly one that is open or excessively high in resistance, will prevent the valve from opening since the gas valve is current-activated and depends on the igniter drawing enough amperage to release the valve mechanism.

The oven sensor is equally critical to this fault. If the sensor has failed or its wiring is damaged, the control board may receive an incorrect temperature signal that never rises during preheating, triggering F11 even if the burner is functioning normally. Wiring integrity across all these components should be inspected before replacing parts, as loose connectors or heat-damaged insulation can mimic component failure.

Source: manufacturer service documentation.

Common causes of F11

  1. 01

    Weak or failed igniter

    Part replacement

    The igniter is the most common cause of F11 on gas LG ranges. If its resistance falls outside the 45 to 400 ohm range, it cannot draw enough current to open the gas valve, so no gas flows and no heat is produced.

  2. 02

    Faulty gas valve

    Part replacement

    The gas valve coil should measure approximately 1 to 1.5 ohms. A reading outside this range or an open circuit in the valve coil means gas will not be released to the burner even when the igniter is functioning correctly.

  3. 03

    Defective oven temperature sensor

    Part replacement

    If the oven sensor has failed or is reading incorrectly, the control board may see a temperature that never rises during preheat, triggering F11 even if the burner is igniting. The sensor and its wiring harness should be tested for proper resistance and continuity.

  4. 04

    Damaged or loose wiring connections

    Wiring / connection

    Heat-damaged insulation, corroded connectors, or loose terminals on the igniter, gas valve, or oven sensor circuits can interrupt the signals needed for proper heating. Inspect all wiring in the oven cavity and at the control board connectors.

See the test procedure for each cause

Frequently asked questions about F11

What does F11 mean on a LG range?
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.
Can I fix the F11 error code on my LG range myself?
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.
Is it safe to use my LG range while the F11 code is showing?
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.
How much does it cost to repair an F11 error on an LG range?
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.
Will resetting my LG range clear the F11 error code?
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.

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