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LG range or oven code F24: meaning and exact next steps

F24 means a Steam Sensor Failure — LG's own wording. This answer applies only to LG electric and gas ranges and wall ovens. LG documents radiant-cooktop codes separately in the same article; griddle, induction and sous-vide codes apply only to models with those features.

On the covered LG range or oven, F24 means a Steam Sensor Failure — LG's own wording. First, note whether the code followed a steam clean. Then: LG's instruction for F24 is a 30 second breaker reset with nothing to press on the panel first — LG's own sequence.

Part of LG range or oven error codes

Differential

Likely causes of “LG range or oven code F24”, and how to tell them apart

  1. 1

    A steam sensor failure

    What separates it F24 shows when a steam function is used

    How to confirm LG words F24 together with F21, F22 and F25 as a steam sensor failure

  2. 2

    Mineral scale on the cavity floor

    What separates it White deposits where steam water collects

    How to confirm Wipe the cavity floor when cool and look at the water area

  3. 3

    A sensor connection that has loosened

    What separates it The code appears at random

    How to confirm Service inspection

  4. 4

    Steam clean used too often with hard water

    What separates it The code follows several steam cycles

    How to confirm Rinse and wipe after each steam cycle

  5. 5

    A control board fault

    What separates it The code returns with a new sensor

    How to confirm Service diagnosis

Before you touch a setting

Record this first — changing settings destroys the evidence

  • Which function was running, steam clean or a steam cooking mode
  • Whether the oven works without steam
  • How hard the home's water is, if known

Try in this order

0 of 7 completed

  1. What to do first

    Reversible

    Note whether the code followed a steam clean.

  2. Correct only the documented fault domain

    Reversible

    LG's instruction for F24 is a 30 second breaker reset with nothing to press on the panel first — LG's own sequence.

  3. Press CLEAR/OFF

    Reversible

    And stop the steam function.

  4. Let the oven cool

    Reversible

    Before wiping inside.

  5. Wipe the cavity floor

    Reversible

    Remove scale and spills.

  6. Reset at the breaker

    Reversible

    Off for 30 seconds, then on.

  7. Try a normal bake

    Reversible

    Without steam.

Model-specific

What is true of this model and not of its siblings

What a steam oven does
A steam clean or steam cooking function puts a little water into the bottom of the cavity, heats it and lets the steam loosen soil or cook food. A sensor watches the temperature and tells the control when the water has turned to steam, so a failed sensor stops the function.
Why hard water matters
Hard water leaves a chalky film on the cavity floor where the water sits. The film can insulate the sensor or change how it reads, so wipe the floor with a damp cloth when the oven is cool and rinse it with clean water. Use the water LG's manual specifies.
What the number means
LG gives F21, F22, F24 and F25 one meaning, a steam sensor failure, so there is no extra detail in the number itself. If you saw a different one earlier, that tells the technician the fault has been recurring, so mention it.
Using the oven meanwhile
A regular bake does not use the steam sensor, so many owners can keep baking, but if the display keeps showing the code or the oven stops, stop and call. Never run the oven in a way that the manual forbids.
Before the technician comes
Have the model number, the exact code and the date it first appeared. Leave the cavity clean and the door clear so the technician can reach the area.
Cleaning afterwards
Once repaired, wipe out any water left after a steam cycle, which keeps scale from building up and the sensor working.
Steam clean compared with self-clean
A steam clean is a short, low-temperature cycle that loosens light soil with moisture, and it differs from a self-clean, which burns soil away at very high heat. If you see F24, you can still use a hand clean: wipe the cavity with a damp cloth after the oven has cooled, use a non-abrasive cleaner for stubborn spots and leave the door open to dry. Avoid starting a high-heat cycle while the sensor fault is open, because the control may not read temperatures correctly.
Planning the repair
Steam sensor repairs are usually quick when the part is on the truck. Ask the booking agent whether the technician will carry the sensor, and give the model and serial numbers from the label so that they can check. Keep the oven clear in front so the technician has room to work.

Evidence ledger

Sources behind this answer

01
LG USA Support LG Range — Error Codes List

Exact questions

Common questions

What does F24 mean on a LG range or oven?+

a Steam Sensor Failure — LG's own wording.

Will descaling help?+

Wiping scale from the cavity floor can, though the sensor itself needs service.

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