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LG range or oven code F25: meaning and exact next steps

F25 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, F25 means a Steam Sensor Failure — LG's own wording. First, note whether the code appeared after a steam cycle ended. Then: for F25 LG has one step, a 30 second breaker reset, and no CLEAR/OFF stage — LG's own sequence.

Part of LG range or oven error codes guide

Differential

Likely causes of “LG range or oven code F25”, and how to tell them apart

  1. 1

    A steam sensor failure

    What separates it F25 shows during or after a steam function

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

  2. 2

    Scale or residue on the sensor area

    What separates it The code follows many steam cycles

    How to confirm Wipe the cavity when cool

  3. 3

    A loose or damaged connection

    What separates it The code is intermittent

    How to confirm Service inspection

  4. 4

    Moisture left in the cavity

    What separates it The code appears after a steam cycle ended

    How to confirm Dry the cavity with the door open

  5. 5

    A control fault

    What separates it The code persists

    How to confirm Service diagnosis

Before you touch a setting

Record this first — changing settings destroys the evidence

  • Whether it shows during or after steam
  • How many steam cycles were run recently
  • Whether the cavity was dried afterwards

Try in this order

0 of 6 completed

  1. What to do first

    Reversible

    Note whether the code appeared after a steam cycle ended.

  2. Correct only the documented fault domain

    Reversible

    For F25 LG has one step, a 30 second breaker reset, and no CLEAR/OFF stage — LG's own sequence.

  3. Press CLEAR/OFF

    Reversible

    Stop any steam function.

  4. Dry the cavity

    Reversible

    With the door open.

  5. Wipe the floor

    Reversible

    When it is cool.

  6. Test with a normal bake

    Reversible

    No steam.

Model-specific

What is true of this model and not of its siblings

A code after the cycle
When F25 shows after a steam cycle has ended, leftover water or scale is a possible reason. Leave the door open for a while to let the cavity dry, then wipe it. If the code stays after the oven is dry and reset, service is the next step.
How often to use steam
Steam functions are useful in moderation. Using them every day in a hard water area builds scale faster. Following each cycle with a wipe and a dry costs a minute and prolongs the sensor's life.
What LG says
LG lists four codes, F21, F22, F24 and F25, as a steam sensor failure and gives the same steps for each: press CLEAR/OFF, reset the breaker for 30 seconds, then arrange service.
Safe checks
You can look at the cavity floor and the door seal, and you can run the oven in bake to see whether it still heats. Do not take off panels or reach behind the cavity wall.
Parts
A technician usually replaces the steam sensor or its lead. Give the model number so that the right one is ordered.
After the repair
Run one short steam cycle while you watch, and check that no code returns before relying on the function.
Choosing your next step
If this is the first time you have seen the code, a reset and a dry-out are reasonable. If it has appeared on several different days, treat it as a real fault and book service rather than waiting for it to fail completely.
What not to try
Do not run the steam function repeatedly to test the sensor, and do not pour water into the cavity beyond what the manual describes. Extra water on a hot oven floor can crack enamel and make a mess in the insulation.
Moisture and the control
After a steam function ends, water stays in the cavity and on the door glass for a time. The sensor sits where it can read that heat, and residual moisture can add noise to the signal. Opening the door slightly once the oven is cool and wiping the cavity gives the sensor a clean, dry start for the next cycle.
Telling the cases apart
If F25 shows after one steam cycle in a long time, a dry-out and a reset may be enough. If it shows after every steam cycle, the sensor or its wiring is the likely cause, and the repair is the same whichever of the four codes was displayed.

Evidence ledger

Sources behind this answer

01
LG USA Support LG Range — Error Codes List

Exact questions

Common questions

What does F25 mean on a LG range or oven?+

a Steam Sensor Failure — LG's own wording.

Why after a steam cycle?+

Moisture or scale may affect the sensor reading.

Is F25 more serious than F21?+

LG words them the same.

Should I stop using steam?+

Yes until it is repaired.

Wrong device or version?

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