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Error code reference

LG Refrigerator Error Code Lo

Ambient temperature is below -10°C, displayed on outside temperature area of LCD.

LG codesLG refrigerator codes

Ambient temperature is below -10°C, displayed on outside temperature area of LCD.

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What Lo means on a LG refrigerator

The Lo code on an LG refrigerator is an informational display, not a fault or malfunction alert. It appears in the outside temperature area of the LCD panel when the ambient (surrounding room) temperature drops below -10°C (14°F). This is the lower threshold of the refrigerator's ambient temperature sensing range, and the display simply cannot represent a value below that point, so it substitutes the "Lo" indicator instead.

This code is directly tied to the ambient temperature sensor, which monitors the environment surrounding the refrigerator. When the sensor reads a value below -10°C, the control board interprets this as an out-of-range low reading and triggers the Lo display. The refrigerator itself is not detecting an internal problem; it is reporting an external environmental condition that falls outside the expected operating range for the appliance.

LG refrigerators are generally rated for operation within specific ambient temperature ranges, typically starting at around 10°C (50°F) on the low end. Running the unit in an environment colder than -10°C can affect compressor performance, ice maker function, and overall cooling efficiency, since refrigeration systems depend on a minimum temperature differential between the refrigerant and the surrounding air. If the unit is installed in a garage or unheated space during winter, this condition is expected and common.

Source: manufacturer service documentation.

Common causes of Lo

  1. 01

    Refrigerator installed in an unheated garage or basement during winter

    Wiring / connection

    This is the most frequent cause. When ambient temperatures drop below -10°C in winter months, the Lo code will appear on any unit stored in an unheated space. No repair is needed if the room temperature is genuinely that cold.

  2. 02

    Ambient temperature sensor malfunction or short circuit

    Part replacement

    If the surrounding room temperature is actually above -10°C but the Lo code still appears, the ambient temperature sensor may be faulty, shorted, or sending an incorrect low reading to the control board. Inspect the sensor and its wiring connections for damage.

  3. 03

    Damaged or disconnected wiring harness to the ambient sensor

    Wiring / connection

    A loose connector, pinched wire, or corroded terminal between the ambient sensor and the main control board can cause the board to read an erroneously low temperature. Check the harness routing and connector seating.

  4. 04

    Main control board fault

    Part replacement

    In rare cases, a failing control board may misinterpret a valid sensor signal and display Lo even under normal ambient conditions. This is typically diagnosed after ruling out sensor and wiring issues.

See the test procedure for each cause

Frequently asked questions about Lo

What does Lo mean on a LG refrigerator?
Lo appears in the outside temperature display area of the LCD when the ambient temperature surrounding the refrigerator drops below -10°C (14°F). It is an informational indicator, not a system error or component failure code. The refrigerator is simply reporting that the room temperature has fallen below the lower limit of its displayable range. No internal fault has been detected.
How do I fix the Lo code on my LG refrigerator?
If the unit is located in a cold garage, basement, or outdoor space during winter, the Lo code will clear on its own once the ambient temperature rises above -10°C. If the surrounding space is not actually that cold, check the ambient temperature sensor and its wiring harness for damage, shorts, or loose connections. Replacing a faulty ambient sensor will resolve the issue if the sensor is the root cause.
Is it safe to keep using my LG refrigerator when it shows Lo?
If the Lo code is appearing because the room is genuinely below -10°C, continued operation is not recommended. LG refrigerators are designed to operate within a specific ambient temperature range, and extremely cold environments can negatively affect compressor function, ice maker performance, and food preservation. Moving the unit to a warmer location is the safest course of action.
How much does it cost to repair the Lo code on an LG refrigerator?
If the code is caused by a genuinely cold environment, there is no repair cost. If an ambient temperature sensor replacement is needed, parts typically range from $15 to $60 depending on the model, with professional labor adding $80 to $200 depending on your location and service provider. A main control board replacement, if required, can cost significantly more, generally in the $150 to $400 range for parts alone.
Will resetting my LG refrigerator clear the Lo code?
A reset will not permanently clear the Lo code if the underlying condition still exists. If the ambient temperature remains below -10°C, or if a faulty sensor continues to send an out-of-range signal, the code will return after the reset. The display will only stop showing Lo once the actual ambient temperature rises above the threshold or the defective component is repaired or replaced.

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