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LG range or oven code F22: meaning and exact next steps

F22 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, F22 means a Steam Sensor Failure — LG's own wording. First, note when in the steam cycle the code appeared. Then: LG's only step for F22 is at the breaker: off for 30 seconds, then on, with no CLEAR/OFF step — LG's own sequence.

Part of LG range or oven error codes

Differential

Likely causes of “LG range or oven code F22”, and how to tell them apart

  1. 1

    A steam sensor failure

    What separates it F22 shows when a steam function starts

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

  2. 2

    A water supply problem to the steam function

    What separates it Little or no steam is made

    How to confirm Check that the water is added as the manual says

  3. 3

    A residue film in the cavity

    What separates it The oven smells of scale

    How to confirm Wipe the cavity when cool

  4. 4

    A damaged sensor lead

    What separates it The code appears after the oven was moved or serviced

    How to confirm Service inspection

  5. 5

    A control fault

    What separates it The code persists after a reset

    How to confirm Service diagnosis

Before you touch a setting

Record this first — changing settings destroys the evidence

  • Whether the code appears at the start of a steam cycle or later
  • Whether any water was added
  • Whether regular baking still works

Try in this order

0 of 6 completed

  1. What to do first

    Reversible

    Note when in the steam cycle the code appeared.

  2. Correct only the documented fault domain

    Reversible

    LG's only step for F22 is at the breaker: off for 30 seconds, then on, with no CLEAR/OFF step — LG's own sequence.

  3. Stop the cycle

    Reversible

    Press CLEAR/OFF.

  4. Check the water

    Reversible

    As the manual says.

  5. Let the cavity cool

    Reversible

    Then wipe it.

  6. Try a short normal bake

    Reversible

    Without steam.

Model-specific

What is true of this model and not of its siblings

A code at the start of steam
When F22 shows as soon as a steam function begins, the oven is telling you the steam sensor gave a reading the control could not accept. Note the moment it appears, because a code that comes at the start tells the technician something different from one that arrives ten minutes in.
Water and the cavity
Steam functions depend on water reaching the cavity floor and heating up. If you add water by hand, check the amount against the manual. Too little or none means no steam, and the control may read that as a sensor problem.
An older oven with scale
Years of hard water leave a hard film that is difficult to wipe. A soft cloth and the cleaner that LG's manual allows will take off a light film. Do not scrape the cavity floor with a blade.
Service visit
The technician can read the sensor with a meter and compare it with the specification, then replace the sensor or the lead if needed. Have the model number from the label inside the door frame.
Cooking in the meantime
If baking works normally, you can use the oven for it. Skip steam functions until it has been fixed so the sensor is not stressed again.
Keeping a record
Write down each time the code appears with the date, since an intermittent fault is easier to find when the pattern is known.
After the visit
Ask the technician to run a short steam cycle before they leave so that you can see that the code does not return. Keep the receipt, since a sensor repair may carry a warranty on the part.
Hard water and descaling
Steam functions leave mineral deposits wherever water is boiled away. In a hard water area, a film builds within weeks. Wiping the cavity floor after each steam cycle is the simplest prevention. If the manual describes a descaling step, follow it exactly, and never use vinegar or any cleaner that LG's instructions leave off their list on the enamel or the sensor, since some chemicals attack the coating.
Reading the signs
A steam oven that makes little visible steam, a floor that stays wet after a cycle or a faint sulphur smell can all precede the code. Telling the technician about these signs helps them decide whether the problem is scale, a sensor or the water feed.

Evidence ledger

Sources behind this answer

01
LG USA Support LG Range — Error Codes List

Exact questions

Common questions

What does F22 mean on a LG range or oven?+

a Steam Sensor Failure — LG's own wording.

Can it clear by itself?+

It may after a reset, but a code that returns needs service.

Does a normal bake use steam?+

No.

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