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Error code reference

LG Refrigerator Error Code CF-FAN ERROR

CF-fan motor error

LG codesLG refrigerator codes

CF-fan motor error: contact failure on feedback signal line, motor wire missing, or defect of the motor itself when operating the fan motor.

First step from the service manual

Check whether the voltage between Main PCB CN 76 brown ↔ black is between 7V and 12V.

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

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What CF-FAN ERROR means on a LG refrigerator

The CF-FAN ERROR on an LG refrigerator indicates a fault with the condenser fan (CF) motor circuit. The control system monitors the fan motor through a feedback signal line that reports operational status back to the main PCB. When the board detects an abnormal or absent feedback signal during motor operation, it logs this error. The fault can originate from three distinct sources: a contact failure on the feedback signal line, a missing or disconnected motor wire, or an internal defect within the fan motor itself.

The first diagnostic step involves checking the supply voltage at Main PCB connector CN 76, specifically between the brown and black wires. A healthy reading falls between 7V and 12V. If the voltage is outside this range, the issue may lie with the PCB output rather than the motor or wiring. If voltage is correct but the fan still does not operate or feedback is absent, attention should shift to the wiring harness connections and the motor itself.

The condenser fan draws heat away from the compressor and condenser coils, so a failure here can cause the refrigerator to run warm, the compressor to overheat, or the unit to cycle erratically. Inspecting connector pins at CN 76 for corrosion, bent terminals, or loose seating is a critical early step before replacing any components.

Source: manufacturer service documentation.

Common causes of CF-FAN ERROR

  1. 01

    Loose or disconnected wiring at CN 76

    Wiring / connection

    The feedback signal wire or power wire to the condenser fan motor may have vibrated loose or pulled free from connector CN 76 on the main PCB. Inspect the brown and black wire terminals for secure seating and check for bent or corroded pins.

  2. 02

    Contact failure on feedback signal line

    Wiring / connection

    Corrosion, moisture intrusion, or a damaged pin inside the feedback signal connector can interrupt the signal between the fan motor and the PCB. Clean or replace the affected connector if continuity is absent along the feedback wire.

  3. 03

    Defective condenser fan motor

    Part replacement

    The motor itself may have an internal winding failure, seized bearings, or a failed hall-effect sensor that prevents it from running or sending a proper feedback signal. If voltage at CN 76 is within the 7V to 12V range but the motor does not spin freely or run, the motor requires replacement.

  4. 04

    Broken or damaged motor wire

    Wiring / connection

    A wire in the harness between the main PCB and the condenser fan motor may be cut, pinched, or internally broken. A visual inspection of the wire run and a continuity test on each conductor can confirm this condition.

  5. 05

    Faulty main PCB output

    Part replacement

    If the voltage between the brown and black wires at CN 76 measures outside the 7V to 12V range and all wiring is intact, the main PCB may not be supplying proper power or reading the feedback circuit correctly, pointing to a board-level fault.

See the test procedure for each cause

Frequently asked questions about CF-FAN ERROR

What does CF-FAN ERROR mean on a LG refrigerator?
CF-FAN ERROR indicates a fault in the condenser fan motor circuit. The main PCB is not receiving a valid feedback signal from the condenser fan motor, which can be caused by a loose wire connection, a broken wire, a contact failure on the feedback line, or a defective fan motor. The condenser fan is responsible for cooling the compressor, so this error should be diagnosed and resolved quickly to prevent further damage.
How do I fix the CF-FAN ERROR on my LG refrigerator?
Start by checking the voltage at Main PCB connector CN 76 between the brown and black wires. A reading between 7V and 12V confirms the board is supplying power correctly, so the next steps are to inspect the wiring harness for loose, broken, or corroded connections and to check whether the fan motor spins freely. If wiring and connections are intact but the motor does not run, the condenser fan motor likely needs to be replaced.
Is the CF-FAN ERROR on an LG refrigerator dangerous?
The error itself is not an immediate safety hazard in the traditional sense, but it does mean the condenser fan is not operating properly. Without adequate condenser fan airflow, the compressor can overheat, which may lead to compressor damage or food spoilage if temperatures rise inside the refrigerator. It is best to address this error promptly rather than allow the unit to keep running in a degraded state.
Will resetting my LG refrigerator clear the CF-FAN ERROR?
A power reset may temporarily clear the error code, but it will return if the underlying fault is not resolved. The main PCB continuously monitors the condenser fan feedback signal during operation, so if the wiring, connection, or motor problem persists, the code will reappear. A reset can be useful to confirm whether the fault is intermittent, but it does not substitute for proper diagnosis and repair.
How much does it cost to repair a CF-FAN ERROR on an LG refrigerator?
Repair costs vary depending on the root cause. If the fix is simply reseating a loose connector or cleaning a corroded terminal, there may be little to no parts cost. A replacement condenser fan motor typically runs in the range of $30 to $80 for the part alone. Adding professional labor, total repair costs generally fall between $100 and $250, though prices vary by region and service provider.

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