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Error code reference

LG Range Error Code C-A2

BLDC motor operation information (upper

LG codesLG range codes

BLDC motor operation information (upper: cooling motor, lower: air intake motor).

First step from the service manual

Check the display for location code (upper=cooling motor, lower=air intake motor); check wire harness connection; check voltage of CN200 (PIN 1-3, 4-6), proper range 10VDC-14VDC.

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

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What C-A2 means on a LG range

The C-A2 error code on an LG range indicates a fault or operational issue with one of the BLDC (Brushless DC) motors in the appliance's ventilation and cooling system. The display will show a location code that identifies which motor is affected: the upper position corresponds to the cooling motor, and the lower position corresponds to the air intake motor. These motors are critical for managing heat and airflow within the range, and a failure in either can impact safe and efficient operation.

The primary diagnostic path begins by reading the location code on the display to pinpoint which motor is involved. From there, the wire harness connections to the affected motor should be inspected for looseness, corrosion, or damage. The next key step is measuring the supply voltage at connector CN200, specifically across PIN 1-3 and PIN 4-6. The correct operating voltage range for these circuits is 10VDC to 14VDC. A reading outside this range points to either a power supply issue or a failing control board, while a correct voltage reading alongside a persistent fault suggests a problem with the motor itself or its associated wiring.

BLDC motors rely on precise electronic commutation rather than brushes, making them sensitive to both voltage irregularities and physical wiring faults. Common failure points include damaged connector pins at CN200, broken or chafed wire harness segments, and motors that have seized or degraded internally. Because the error code distinguishes between the cooling motor and the air intake motor, accurate diagnosis depends entirely on reading that location code first before performing any component-level testing.

Source: manufacturer service documentation.

Common causes of C-A2

  1. 01

    Loose or damaged wire harness connection

    Wiring / connection

    The connector at CN200 or the wiring leading to the affected BLDC motor may be loose, corroded, or have a broken pin. Inspect the harness visually and reseat the connector firmly before proceeding to other tests.

  2. 02

    Voltage out of range at CN200

    Part replacement

    If the measured voltage at CN200 PIN 1-3 or PIN 4-6 falls outside the 10VDC to 14VDC window, the motor is not receiving proper power. This can indicate a failing control board or a power supply issue upstream of the connector.

  3. 03

    Failed BLDC motor (cooling or air intake)

    Part replacement

    The motor itself may have seized or suffered internal winding failure. If wiring and voltage check out correctly but the fault persists, the motor indicated by the location code on the display likely needs replacement.

  4. 04

    Faulty main control board

    Part replacement

    The control board is responsible for supplying and regulating voltage to the BLDC motors through CN200. If the board is not outputting the correct voltage range, it may need to be replaced.

  5. 05

    Debris or obstruction blocking motor

    Wiring / connection

    Physical obstructions such as grease buildup or foreign material can prevent the fan blade from spinning freely, causing the BLDC motor to fault. Inspect the motor and fan assembly for any blockage.

See the test procedure for each cause

Frequently asked questions about C-A2

What does C-A2 mean on a LG range?
The C-A2 code signals a problem with one of the BLDC motors in the range's ventilation system. The display shows a location code indicating whether the fault is with the upper cooling motor or the lower air intake motor. These motors manage airflow and heat dissipation during range operation. Diagnosis involves checking wiring and measuring voltage at connector CN200 across PIN 1-3 and PIN 4-6.
Can I fix the C-A2 error on my LG range myself?
Some steps, like inspecting and reseating the wire harness connector at CN200, can be performed by a knowledgeable DIYer with basic electrical safety knowledge. However, measuring DC voltage at internal connectors and replacing components like the control board or a BLDC motor requires comfort working inside live or recently powered appliances. If you are not experienced with appliance electrical systems, a qualified technician is recommended.
Is it safe to use my LG range while the C-A2 error is showing?
It is not advisable to continue using the range while this error is active. The cooling and air intake motors play an important role in managing internal temperatures, and operating the appliance without proper airflow could lead to overheating or further component damage. The range should be inspected and the fault resolved before resuming normal use.
Will resetting my LG range clear the C-A2 error?
A power reset, such as unplugging the range or cycling the breaker, may temporarily clear the display, but the code will return if the underlying issue with the BLDC motor, wiring, or voltage supply has not been corrected. Resetting alone is not a repair and should only be used as part of a structured diagnostic process.
How much does it cost to repair a C-A2 error on an LG range?
Repair costs depend on what component has failed. If the fix is simply reseating a loose connector, there may be no parts cost, though a service call fee typically runs between $75 and $150. Replacing a BLDC motor generally costs between $100 and $250 in parts, while a main control board can range from $150 to $400 or more. Labor charges vary by region and service provider.

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