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Error code reference

LG Refrigerator Error Code Er gF

Flow meter (sensor) defect caused by error of flow meter or water input or low water pressure or flow meter…

LG codesLG refrigerator codes

Flow meter (sensor) defect caused by error of flow meter or water input or low water pressure or flow meter connection issue.

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What Er gF means on a LG refrigerator

The Er gF code indicates the control board has detected a fault in the flow meter circuit. The flow meter is a sensor that monitors water moving through the refrigerator's water dispenser and ice maker supply line. The board triggers this code when it cannot read a valid signal from the flow meter, which can result from a defective flow meter sensor itself, an interruption in water input to the unit, or insufficient water pressure reaching the flow meter. Technicians should begin by inspecting the flow meter's wiring harness and connector for damage or loose pins, then verify the water supply line is open and delivering adequate pressure, typically a minimum of 20 PSI.

For homeowners, Er gF means your refrigerator has detected a problem with the sensor that tracks water flowing into the appliance. This sensor feeds data to the control board so it knows when water is moving through the system for ice production and dispensing. When something goes wrong with this sensor, its wiring, or the water supply feeding it, the refrigerator throws this code to alert you. The most common non-part fixes involve checking that the water shutoff valve behind the fridge is fully open and that your household water pressure is not too low. If pressure and supply are confirmed good, the flow meter sensor itself is likely defective and will need replacement.

Source: manufacturer service documentation.

Common causes of Er gF

  1. 01

    Defective flow meter sensor

    Part replacement

    The flow meter sensor itself has failed and is sending an invalid or absent signal to the control board. This is the most common hardware cause when water supply and pressure are confirmed normal.

  2. 02

    Low household water pressure

    Wiring / connection

    Water pressure below the refrigerator's minimum requirement prevents the flow meter from registering adequate flow, triggering the Er gF code. Most LG refrigerators require at least 20 PSI at the inlet.

  3. 03

    Kinked or closed water supply line

    Wiring / connection

    A kinked supply line or a partially closed shutoff valve restricts water input to the unit, causing the flow meter to detect insufficient or no flow. Straightening the line or fully opening the valve resolves this without parts.

  4. 04

    Loose or damaged flow meter wiring harness

    Wiring / connection

    A disconnected, corroded, or broken connector at the flow meter prevents the control board from receiving sensor data, producing the same fault signal as a failed sensor. Inspecting and reseating the connector is the first wiring check.

See the test procedure for each cause

Frequently asked questions about Er gF

What does the Er gF code mean on an LG refrigerator?
Er gF means the control board has detected a defect in the flow meter circuit. The flow meter is a sensor that monitors water moving into the refrigerator for the ice maker and water dispenser. The fault can come from the sensor itself, a wiring problem at the flow meter connector, restricted water input, or water pressure that is too low.
How do I fix Er gF on my LG refrigerator?
Start by confirming the water shutoff valve behind the refrigerator is fully open and the supply line is not kinked. Next, check that your household water pressure meets the minimum 20 PSI requirement. If supply and pressure are fine, unplug the refrigerator and inspect the flow meter's wiring harness connector for loose or corroded pins and reseat it. If the code returns after these checks, the flow meter sensor itself is likely defective and needs to be replaced.
Can I still use my LG refrigerator when it shows Er gF?
The refrigerator's cooling and food storage functions will generally continue operating with Er gF active, but the ice maker and water dispenser may not work correctly because the control board cannot confirm water is flowing properly. You can still use the unit for food storage, but do not rely on ice production until the fault is resolved. Leaving it unaddressed long-term can prevent the ice maker from filling and may cause it to run dry.
How much does it cost to fix Er gF on an LG refrigerator?
If the fix is a supply line adjustment or water pressure issue, the cost is minimal or free. A replacement flow meter sensor typically costs between $20 and $60 for the part. If you hire a technician for diagnosis and installation, expect a total repair cost in the range of $100 to $200 depending on your area and service rates. The sensor replacement itself is a moderate DIY task that requires accessing the water inlet area and disconnecting the wiring harness.
Is Er gF caused by low water pressure on LG refrigerators?
Yes, low water pressure is one of the direct causes listed for the Er gF code. If the pressure at the water inlet drops below roughly 20 PSI, the flow meter cannot detect sufficient flow and the control board logs the fault. Check your home's water pressure and make sure no other high-demand appliances are running simultaneously when testing. If pressure is adequate and the code persists, the flow meter sensor or its wiring connection is the next area to inspect.

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