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Error code reference

LG Range Error Code F19

Lower oven no heating

LG codesLG range codes

Lower oven no heating - starting temperature of 130°F or less with door closed, oven temperature does not rise more than 10°F compared with starting temperature for 5 minutes after start of cooking (except Proof, Warm, and Easy Clean).

First step from the service manual

Check electrical wiring, then check oven sensor.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
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What F19 means on a LG range

The F19 error code on an LG range indicates a lower oven no-heat failure. Specifically, the control board triggers this fault when the oven starts at or below 130 degrees Fahrenheit and fails to rise more than 10 degrees Fahrenheit within the first 5 minutes of a cooking cycle. This monitoring logic is active for all cooking modes except Proof, Warm, and Easy Clean, which operate at low temperatures where a slower rise is expected. The code is the control board's way of confirming that meaningful heating is not occurring in the lower oven cavity.

The diagnostic process begins with a thorough inspection of the electrical wiring. Loose, burnt, or disconnected wiring connections at the bake element, broil element, or oven temperature sensor can interrupt the circuit entirely, preventing any heat from reaching the oven cavity. Wiring harness damage from heat exposure over time is a common culprit, particularly at connectors located near the rear of the oven cavity or at the control board itself.

After confirming wiring integrity, the oven temperature sensor is the next component to evaluate. The sensor monitors cavity temperature and reports it back to the control board. If the sensor is reading inaccurately or has failed open, the board may not detect a temperature rise even if the element is functioning. Beyond the sensor, a failed bake element or a faulty oven control board can also prevent heating. A failed relay on the control board may leave the element unpowered regardless of the command signal sent.

Source: manufacturer service documentation.

Common causes of F19

  1. 01

    Faulty or burned bake element

    Part replacement

    The lower bake element is the most common cause of a no-heat condition. Visually inspect the element for visible breaks, burn marks, or blistering, and test it for continuity with a multimeter.

  2. 02

    Loose or damaged wiring connections

    Wiring / connection

    Wiring harness connections at the bake element terminals, sensor, or control board can loosen or burn over time. Inspect all connectors for corrosion, heat damage, or poor contact before replacing any components.

  3. 03

    Failed oven temperature sensor

    Part replacement

    If the oven sensor is reading incorrectly or has an open circuit, the control board will not detect a temperature rise even if the element is generating heat. The sensor can be tested for proper resistance values at room temperature.

  4. 04

    Faulty oven control board

    Part replacement

    A failed relay on the control board can prevent power from reaching the bake element. If wiring, the element, and the sensor all test correctly, the control board should be evaluated as the source of the fault.

  5. 05

    Failed oven igniter (gas models) or relay failure

    Part replacement

    On applicable configurations, a weak or failed igniter may not draw enough current to open the gas valve, preventing ignition and causing the no-heat fault. Test igniter current draw with an ammeter to confirm it meets the required threshold.

See the test procedure for each cause

Frequently asked questions about F19

What does F19 mean on a LG range?
The F19 code on an LG range means the lower oven is not heating properly. The control board detects this when the oven starts at or below 130 degrees Fahrenheit and the temperature does not rise more than 10 degrees Fahrenheit within the first 5 minutes of a cooking cycle. This fault applies to all standard cooking modes but excludes Proof, Warm, and Easy Clean. It typically points to a failed bake element, sensor issue, or a wiring problem.
Can I fix the F19 error on my LG range myself?
Some causes of F19 are within reach of a knowledgeable DIYer. Inspecting wiring connections and testing the oven temperature sensor for continuity are tasks that can be done with basic tools and a multimeter. Replacing a bake element is also a common DIY repair. However, if the control board is the source of the fault, replacement is more complex and many homeowners prefer to have a qualified technician handle that work.
Is it safe to use my LG range while the F19 code is displayed?
You should not rely on the lower oven for cooking while the F19 fault is active, as the oven is confirmed to not be reaching cooking temperatures. Using it could result in undercooked food or an unresolved electrical issue going undetected. Diagnose and repair the fault before resuming normal oven use.
How much does it cost to repair an F19 error on an LG range?
Repair costs vary depending on which component has failed. A replacement bake element typically falls in the range of $20 to $75 for the part alone. An oven temperature sensor generally costs between $15 and $50. A new oven control board is the most expensive fix, often ranging from $100 to $300 or more for the part. Adding a technician's labor will increase the total cost by $75 to $200 depending on your location.
Will resetting my LG range clear the F19 error code?
Resetting the range by disconnecting it from power for a few minutes may temporarily clear the F19 code, but the fault will return as soon as you attempt to use the lower oven if the underlying problem has not been fixed. The control board re-runs its heating check every time a cook cycle starts, so the error will reappear until the faulty component is repaired or replaced.

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