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Error code reference

LG Refrigerator Error Code OF r

Fridge-Off Forced Operation

LG codesLG refrigerator codes

Fridge-Off Forced Operation – compressor at 3600 RPM, fridge compartment off for checking TDM valve (F Valve Open, R Valve Off) (RSG5V** model).

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What OF r means on a LG refrigerator

The OF r code on LG refrigerators, specifically RSG5V series models, indicates a Fridge-Off Forced Operation mode. This is a diagnostic test state, not a fault code in the traditional sense. When OF r is active, the compressor runs at a fixed speed of 3600 RPM while the fridge compartment cooling is deliberately suspended. The system achieves this by commanding the TDM (Twin/Triple Door Management) valve into a specific position: the freezer valve (R Valve) is closed off, and the fridge valve (F Valve) is held open. This configuration allows a technician to isolate and evaluate the TDM valve's mechanical and electrical behavior under controlled operating conditions.

The TDM valve is a motorized diverter that routes refrigerant flow between the freezer and fresh food compartments. During normal operation, this valve cycles to maintain target temperatures in both zones. The OF r mode forces a static valve position so the technician can confirm whether the valve actuates correctly, verify refrigerant flow is reaching the intended evaporator, or identify a stuck or failed valve motor. The compressor running at a steady 3600 RPM provides a consistent refrigerant flow rate during this evaluation, making airflow and temperature response easier to interpret.

This mode is typically entered intentionally through the control panel button sequence used to access LG's diagnostic and forced operation menus. It should not appear during normal household use. If OF r displays without deliberate activation, it may indicate an unintended button combination was pressed, a control board anomaly, or a stuck button on the display panel. In any of these cases, the refrigerator is not actively cooling the fresh food compartment while this mode is engaged, so the condition should be exited promptly to avoid food temperature concerns.

Source: manufacturer service documentation.

Common causes of OF r

  1. 01

    Accidental activation via control panel

    Wiring / connection

    The OF r forced operation mode is entered through a specific button sequence on the control panel. Accidental or unintended presses of multiple buttons simultaneously can trigger this diagnostic state without the user intending to do so.

  2. 02

    Intentional technician diagnostic test

    Wiring / connection

    A service technician may have deliberately entered OF r mode to evaluate TDM valve operation or refrigerant flow behavior. The mode remains active until it is manually exited through the control panel.

  3. 03

    Stuck or malfunctioning control panel button

    Part replacement

    A physically stuck button on the display panel can register as a held or repeated keypress, which may inadvertently trigger diagnostic modes including OF r. Inspect the panel buttons for debris, stickiness, or mechanical failure.

  4. 04

    Control board anomaly

    Part replacement

    A control board sending erratic signals to the display or operating logic can cause the unit to enter forced operation states unexpectedly. This is less common but possible when the board experiences voltage irregularities or internal faults.

See the test procedure for each cause

Frequently asked questions about OF r

What does OF r mean on a LG refrigerator?
OF r stands for Fridge-Off Forced Operation on LG RSG5V series refrigerators. In this mode, the compressor runs at 3600 RPM while the fresh food compartment cooling is suspended and the TDM valve is held in a fixed position with the fridge valve open and the freezer valve off. This is a diagnostic test state used to evaluate TDM valve behavior, not a standard fault code. The fridge section will not cool normally while this display is active.
How do I exit OF r mode on my LG refrigerator?
To exit OF r mode, use the same control panel button sequence that is used to navigate LG's forced operation or diagnostic menu. On most LG models, pressing and holding the relevant buttons for several seconds will cycle through or exit the diagnostic modes. Consult the specific button layout for your RSG5V model, as the exact sequence can vary by production run. If the mode cannot be exited through button input, a power cycle by unplugging the unit for 60 seconds may reset the control board to normal operation.
Is it safe to leave my LG refrigerator in OF r mode?
It is not safe to leave the refrigerator in OF r mode for extended periods if food is stored in the fresh food compartment. Because the fridge section is deliberately shut off during this mode, temperatures in that compartment will rise over time, creating a food safety risk. The freezer compartment may continue operating depending on system behavior, but the fresh food section should be considered unprotected. Exit the mode as soon as possible and verify that temperatures return to normal operating ranges.
Will resetting my LG refrigerator clear the OF r display?
A power reset, achieved by unplugging the refrigerator for approximately 60 seconds and then restoring power, will often clear the OF r forced operation state and return the unit to normal cooling mode. However, if a stuck control panel button or a control board issue is causing the mode to activate repeatedly, the display may return after reset. In those cases, inspecting the panel buttons for physical damage and evaluating the control board would be the next steps.
How much does it cost to repair an LG refrigerator showing OF r?
If OF r was triggered accidentally, there is no repair cost since simply exiting the mode restores normal operation. If a stuck panel button is the cause, button or control panel replacement typically costs in the range of $75 to $200 including parts and labor. A failed control board, which is a less common cause, can cost between $200 and $450 or more depending on parts availability and local labor rates. Having a technician confirm the root cause before ordering parts is recommended to avoid unnecessary expense.

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