mypros+
Error code reference

LG Refrigerator Error Code F

Freezer FAN BLDC Motor Failure

LG codesLG refrigerator codes

Freezer FAN BLDC Motor Failure — fan is restrained, wires to fan motor disconnected, or drive IC/TR broken (occurs when MICOM does not sense fan motor feedback signal for 65 seconds or longer).

First step from the service manual

Enter Test Mode 1, open freezer door and check air flow; if no airflow, rotate fan by hand to check if stuck/locked.

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

MyPros+ Max

Get the full diagnostic procedure for F.

  • 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
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What F means on a LG refrigerator

The F error code on an LG refrigerator indicates a Freezer FAN BLDC (Brushless DC) Motor Failure. The MICOM (microcomputer control board) continuously monitors a feedback signal from the freezer evaporator fan motor. When this feedback signal is absent for 65 consecutive seconds or longer, the MICOM triggers the F code and logs the fault. BLDC motors rely on rotor position feedback to operate correctly, so a missing signal tells the control board the motor is either not spinning or not communicating its rotation status back to the system.

There are three primary hardware conditions that cause this code: the fan blade or motor shaft is physically restrained and cannot spin, the wiring harness between the fan motor and the control board is disconnected or damaged, or the drive IC or transistor (TR) responsible for powering and controlling the motor has failed. Each of these conditions interrupts the feedback loop in a different way, but all result in the same 65-second timeout and the same displayed fault code.

Diagnosing this code correctly requires entering Test Mode 1 and physically observing the freezer fan with the freezer door open. If no airflow is present, the technician should attempt to rotate the fan blade by hand. A blade that spins freely points toward an electrical or electronic fault such as a wiring disconnect or failed drive component. A blade that is stiff or locked indicates a mechanical obstruction or a seized motor bearing. Narrowing down the root cause before ordering parts prevents unnecessary replacements.

Source: manufacturer service documentation.

Common causes of F

  1. 01

    Fan blade restrained or seized motor

    Part replacement

    Ice buildup around the fan blade or a worn motor bearing can physically prevent the fan from spinning. Try rotating the blade by hand; resistance or a locked blade confirms a mechanical obstruction or seized motor.

  2. 02

    Disconnected or damaged wiring harness

    Wiring / connection

    The connector between the fan motor and the control board can loosen due to vibration or repeated door use. Inspect the wiring harness running to the freezer fan motor for disconnected plugs, broken wires, or signs of chafing.

  3. 03

    Failed BLDC fan motor

    Part replacement

    The fan motor itself can fail internally, causing it to draw no power or produce no feedback signal. If the wiring is intact and the blade is not obstructed but still does not spin, the motor unit likely needs replacement.

  4. 04

    Failed drive IC or transistor on control board

    Part replacement

    The drive IC or TR on the main control board is responsible for sending power and control signals to the BLDC motor. If this component is damaged, the motor will not receive the correct drive signal and will not run even if the motor and wiring are intact.

  5. 05

    Ice obstruction around evaporator fan housing

    Wiring / connection

    Excessive frost accumulation in the evaporator compartment can pack around the fan housing and prevent blade rotation. A manual defrost cycle may clear the obstruction without requiring parts replacement.

See the test procedure for each cause

Frequently asked questions about F

What does F mean on a LG refrigerator?
The F code on an LG refrigerator indicates a Freezer FAN BLDC Motor Failure. The refrigerator's control board (MICOM) did not detect a feedback signal from the freezer evaporator fan motor for 65 seconds or longer. This can be caused by a restrained or seized fan, a disconnected wiring harness, or a failed drive IC or transistor. The freezer fan is critical for circulating cold air, so this fault should be addressed promptly.
Can I fix the F error code on my LG refrigerator myself?
Some causes of the F code are DIY-friendly. Checking for ice buildup around the fan blade, manually defrosting the freezer compartment, and inspecting the wiring harness for loose connectors are all tasks a careful homeowner can perform. If the motor itself is seized or the control board drive IC has failed, those repairs typically require part replacement and some comfort with appliance disassembly. Entering Test Mode 1 and checking for airflow at the freezer fan is a good first step before purchasing any parts.
Is it safe to keep using my LG refrigerator when the F code is showing?
Operating the refrigerator with an active F code means the freezer fan is not running, which will cause temperatures in both the freezer and fresh food compartments to rise. Food safety becomes a concern fairly quickly, especially in the freezer. It is best to address the fault as soon as possible and avoid storing perishable food until the fan is confirmed to be operating correctly.
How much does it cost to repair an F error code on an LG refrigerator?
Repair costs vary depending on the root cause. A new freezer evaporator fan motor typically costs between $30 and $100 for the part alone. If the main control board needs replacement due to a failed drive IC or transistor, board costs can range from $100 to $250 or more. Adding professional labor generally brings the total service cost to somewhere between $150 and $400 depending on your location and the specific repair needed.
Will resetting my LG refrigerator clear the F error code?
A power reset may temporarily clear the F code from the display, but the code will return if the underlying hardware problem is not resolved. Because the fault triggers after 65 seconds of missing fan feedback, the MICOM will log the error again as soon as the same condition is detected. A reset is useful for confirming whether a fault is intermittent, but it is not a repair. The fan motor, wiring, and drive components should be inspected to find and correct the actual cause.

Related LG refrigerator codes

All LG refrigerator codes
View all 485 LG refrigerator codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass