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Error code reference

LG Refrigerator Error Code Er FF

Failure of BLDC fan motor at freezing room

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Failure of BLDC fan motor at freezing room - poor motor, hooking of wires to fan, contact of structures to fan, snapping or short-circuit of lead wire (no fan motor signal for more than 115 seconds during fan motor operation).

First step from the service manual

Check fan motor wiring and physical obstructions; fan motor is OFF during this error.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What Er FF means on a LG refrigerator

Er FF indicates the LG refrigerator's control board did not receive a feedback signal from the freezer compartment's BLDC (Brushless DC) fan motor within 65 seconds of initiating motor operation. The control board monitors the motor's Hall effect feedback signal to confirm rotation. When that signal is absent for 65 consecutive seconds, the board registers the fault and displays Er FF. The diagnostic starting point is the motor's wiring harness connection, the drive IC (integrated circuit responsible for powering the motor), and the TR (transistor) in the motor drive circuit.

For homeowners: the freezer fan circulates cold air throughout the freezer and refrigerator compartments. When this fan stops working and the refrigerator's control board detects no confirmation that the fan is actually spinning, it triggers Er FF. Without the freezer fan running, temperatures in both the freezer and fresh food sections will rise, and food spoilage becomes a real risk the longer the error goes unresolved.

This error can stem from a loose wire connector, a failed fan motor, or a problem with the electronics that drive the motor. Because the freezer fan is critical to maintaining safe temperatures in both compartments, this error should be addressed promptly.

Source: manufacturer service documentation.

Common causes of Er FF

  1. 01

    Loose or damaged wiring harness to BLDC fan motor

    Wiring / connection

    A disconnected, pinched, or corroded connector between the freezer fan motor and the control board prevents the feedback signal from reaching the board. This is the first item to inspect per LG's own diagnostic sequence.

  2. 02

    Failed BLDC freezer fan motor

    Part replacement

    The fan motor itself may have seized, burned out, or lost its internal Hall effect sensor function, making it unable to spin or send a feedback signal. A seized motor is often caused by ice buildup around the fan blade obstructing rotation.

  3. 03

    Faulty drive IC on the motor control circuit

    Part replacement

    The drive IC converts control signals into the power pulses that spin the BLDC motor. If the IC fails, the motor receives no proper drive signal and cannot run, resulting in no feedback being returned to the control board.

  4. 04

    Failed TR (transistor) in the motor drive circuit

    Part replacement

    The transistor in the motor drive circuit acts as a switch to regulate current to the BLDC motor. A shorted or open transistor disrupts motor operation entirely, preventing the motor from spinning and causing the control board to log Er FF.

See the test procedure for each cause

Frequently asked questions about Er FF

What does Er FF mean on an LG refrigerator?
Er FF means the control board did not receive a feedback signal from the freezer compartment's BLDC fan motor within 65 seconds during motor operation. The control board expects a Hall effect signal confirming the fan is spinning. When that signal never arrives, it logs Er FF. The fault can point to a wiring issue, a failed fan motor, or a problem with the drive IC or transistor in the motor control circuit.
How do I fix Er FF on an LG refrigerator?
Start by unplugging the refrigerator and checking the wiring harness connector at the freezer BLDC fan motor for looseness, corrosion, or visible damage. Reconnect or repair the connector if needed, then restore power to see if the error clears. If the error persists, check for ice buildup around the fan blade and defrost manually if present. If the fan motor does not spin freely by hand or shows no continuity, replace the freezer fan motor. If the motor checks out but the error remains, the drive IC or transistor on the control board likely needs professional evaluation and replacement.
Can I still use my LG refrigerator with an Er FF error code?
Continued use is not recommended. The freezer BLDC fan circulates cold air through both the freezer and fresh food compartments. With this fan not operating, temperatures in both sections will climb and food safety is at risk within a few hours. Move perishables to another refrigerator or cooler and address the repair as quickly as possible.
How much does it cost to fix Er FF on an LG refrigerator?
If the fix is simply reseating a loose wiring connector, there is no parts cost. A replacement LG freezer BLDC fan motor typically costs between $30 and $80 for the part. If the drive IC or transistor on the main control board is the culprit, a replacement control board can range from $100 to $250 depending on the model. Adding a service technician's labor, total repair costs commonly fall between $150 and $350 for a fan motor replacement and can exceed $400 for a control board repair.
Could ice buildup cause the Er FF error on my LG refrigerator?
Yes. If ice accumulates around the freezer fan blade, the blade cannot turn freely and the motor stalls. The control board then receives no feedback signal and displays Er FF. Unplug the refrigerator, remove any food, and allow the freezer to defrost completely with the doors open for several hours. Once the ice clears, plug the unit back in and check whether the error returns. If it does, the motor or electronics may be separately damaged and require replacement.

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