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Error code reference

LG Freezer Error Code 8

Condenser fan motor (COMP-FAN) restriction or feedback signal defective.

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Condenser fan motor (COMP-FAN) restriction or feedback signal defective.

First step from the service manual

Check voltage between MAIN PCB CN74 #3 and #5; should be within 7V~12V.

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

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What 8 means on a LG freezer

Error code 8 on an LG freezer indicates a fault with the condenser fan motor, identified in the wiring schematic as COMP-FAN. This fan is responsible for drawing air across the condenser coils to dissipate heat from the refrigeration cycle. When the main PCB detects that the fan motor is either mechanically restricted or that its feedback signal has failed, it logs error code 8 and may reduce or halt compressor operation to protect the system from overheating.

The first diagnostic step involves measuring the supply voltage at connector CN74 on the main PCB, specifically between pins 3 and 5. This voltage should read between 7V and 12V under normal operating conditions. If the voltage falls outside this range, the fault likely originates with the PCB or its control circuit rather than the motor itself. If voltage is within spec but the motor is not spinning or the feedback signal is absent, the fault points to the fan motor assembly.

Common causes include a motor winding that has failed open or shorted, a fan blade obstructed by ice buildup or debris, a broken or corroded wiring harness between CN74 and the motor, or a failed feedback sensor within the motor. Because condenser fan restriction can lead to elevated compressor temperatures and compressor failure, this error should be addressed promptly rather than cleared and ignored.

Source: manufacturer service documentation.

Common causes of 8

  1. 01

    Fan blade obstruction or ice buildup

    Wiring / connection

    Debris, ice accumulation, or foreign objects can physically block the condenser fan blade from spinning. Inspect the fan blade for obstructions and verify it rotates freely by hand.

  2. 02

    Failed condenser fan motor

    Part replacement

    The motor windings can fail open or short internally, causing the motor to stop spinning or produce no feedback signal to the PCB. If voltage at CN74 pins 3 and 5 is within 7V to 12V but the motor does not run, the motor assembly needs replacement.

  3. 03

    Defective fan motor feedback signal

    Part replacement

    The COMP-FAN motor includes a feedback circuit that reports rotational speed to the main PCB. If this sensor or its internal circuitry fails, the board will detect no signal and trigger error code 8 even if the motor is mechanically intact.

  4. 04

    Wiring harness damage or connector corrosion

    Wiring / connection

    The harness running between the main PCB connector CN74 and the fan motor can develop breaks, shorts, or corroded terminals. Inspect the wiring and connector pins for damage, corrosion, or loose seating before condemning the motor or board.

  5. 05

    Main PCB output failure

    Part replacement

    If the voltage measured between CN74 pins 3 and 5 is outside the 7V to 12V range, the PCB itself may not be supplying correct power to the fan motor circuit. A board fault can mimic a motor failure and should be diagnosed after ruling out wiring and motor issues.

See the test procedure for each cause

Frequently asked questions about 8

What does 8 mean on a LG freezer?
Error code 8 on an LG freezer signals a problem with the condenser fan motor, labeled COMP-FAN in the system wiring. The control board has detected either a mechanical restriction preventing the fan from spinning or a loss of the feedback signal from the fan motor. This error can cause the freezer to reduce cooling performance or stop running to protect the compressor.
Can I fix LG freezer error code 8 myself?
Some causes of error code 8 are DIY-friendly. Clearing a blocked fan blade or melting ice buildup around the condenser fan requires no special tools. However, testing voltage at PCB connector CN74 pins 3 and 5 with a multimeter and replacing the fan motor or main PCB are tasks better suited to technicians with appliance repair experience and comfort working around electrical components.
Is it safe to keep using my LG freezer when error code 8 appears?
Continued operation is not recommended when error code 8 is active. The condenser fan removes heat generated by the compressor, and without it functioning correctly the compressor can overheat. Running the freezer in this condition risks permanent compressor damage, which is a significantly more expensive repair than addressing the fan motor fault directly.
How much does it cost to repair LG freezer error code 8?
Repair costs vary depending on the root cause. Clearing a physical obstruction may cost nothing if done yourself. Replacing a condenser fan motor typically runs between $80 and $200 including parts and labor. If the main PCB requires replacement, costs can range from $200 to $450 or more depending on parts availability and labor rates in your area.
Will resetting my LG freezer clear error code 8?
A power reset may temporarily clear the error code display, but it will return if the underlying fault with the condenser fan motor or its wiring is not resolved. Because this error involves a hardware failure rather than a software glitch, resetting the unit without diagnosing and fixing the cause will not result in a lasting repair.

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