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Error code reference

LG Oven Error Code F-12

EEPROM error for My Menu.

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EEPROM error for My Menu.

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What F-12 means on a LG oven

The F-12 error code on an LG oven indicates an EEPROM (Electrically Erasable Programmable Read-Only Memory) error specifically related to the My Menu function. EEPROM is a type of non-volatile memory integrated into the oven's control board that stores user-defined settings, preferences, and custom menu configurations. When the control system detects that data stored in this memory segment is corrupted, unreadable, or cannot be written to correctly, it triggers the F-12 fault to alert the user and technician that the memory integrity has been compromised.

The My Menu feature allows users to save frequently used cooking settings for quick recall. This function relies on a dedicated section of the EEPROM on the main control board. Corruption in this memory area can occur due to power surges, voltage fluctuations during a write cycle, or the gradual degradation of the EEPROM cells over time. In some cases, a momentary power interruption while the board was actively saving data can leave the memory in an inconsistent state that the firmware cannot recover from automatically.

Because the EEPROM is physically embedded in the main control board, it is not a component that can be replaced independently in most residential oven configurations. Diagnosis typically focuses on determining whether a power reset clears the fault or whether the control board itself requires replacement. Repeated or persistent F-12 errors after a reset strongly suggest the control board has a hardware-level memory failure that will not resolve without part replacement.

Source: manufacturer service documentation.

Common causes of F-12

  1. 01

    EEPROM data corruption from a power surge

    Wiring / connection

    A voltage spike or power surge can corrupt the data stored in the EEPROM memory on the control board, causing the oven to fail its internal memory check. Check if the error appeared after a storm, power outage, or electrical event in the home.

  2. 02

    Power interruption during a memory write cycle

    Wiring / connection

    If power was cut while the oven was actively saving My Menu data, the EEPROM can be left in a partially written, unreadable state. A power reset may resolve this if the corruption is minor.

  3. 03

    Failed or degraded control board EEPROM

    Part replacement

    EEPROM memory cells have a finite number of write cycles and can fail over time, causing permanent data corruption. If the F-12 error returns consistently after resets, the control board has likely reached a point of hardware failure.

  4. 04

    Faulty main control board

    Part replacement

    Beyond EEPROM cell wear, other failures on the control board such as solder joint failures or component damage can disrupt communication with the memory, triggering this error. Board replacement is the resolution in these cases.

See the test procedure for each cause

Frequently asked questions about F-12

What does F-12 mean on a LG oven?
The F-12 code on an LG oven indicates an EEPROM error related to the My Menu function. It means the oven's control board has detected that the memory storing your custom menu settings is corrupted or unreadable. This is a control board-level issue that may require a board replacement if a power reset does not resolve it.
Can I fix the F-12 error on my LG oven myself?
The first step is to perform a power reset by unplugging the oven or turning off its circuit breaker for several minutes, then restoring power. If the error clears and does not return, the fault was likely caused by a temporary power event. If the error persists or comes back repeatedly, the control board will need to be replaced, which is a more involved repair that requires working with electrical components.
Will resetting the oven clear the F-12 error code?
A power reset can clear the F-12 error if the EEPROM corruption was caused by a temporary power interruption or minor data write issue. Disconnect the oven from power for at least five minutes before restoring it. However, if the underlying EEPROM cells on the control board have degraded or failed, the error will return and a reset will not provide a lasting fix.
Is it safe to use my LG oven when it shows an F-12 error?
The F-12 error is specific to the My Menu memory function and does not necessarily mean the oven's core cooking or safety systems are compromised. That said, operating an oven with an active fault code is generally not recommended until the cause is diagnosed. If the oven is displaying the error at startup and core functions appear affected, discontinue use until the control board is inspected.
How much does it cost to repair an F-12 error on an LG oven?
If the issue requires a control board replacement, parts alone typically range from around $150 to $350 or more depending on the specific oven model. Adding professional labor, total repair costs can range from approximately $250 to $500 or higher. If a simple power reset resolves the error, there is no parts cost involved.

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