LG Air Conditioner Error Code C8

C8 indicates that the indoor BLDC fan motor is locked, meaning the control board has detected that the fan is not rotating. This code only appears on LG indoor units equipped with a Brushless DC fan motor. The unit shuts down to prevent motor burnout when this condition is detected. Common causes include physical obstructions, a loose CN-Motor1 connector, or a failed motor.

No, you should not attempt to run the unit while C8 is active. A locked fan motor can overheat quickly and cause additional damage to the motor windings or the control board. The unit's control system triggers this code specifically to prevent further damage, so the shutdown should be respected until the fault is resolved.

Repair costs vary depending on the root cause. If only a wiring connector needs to be reseated or an obstruction removed, a service call fee may be the primary cost, typically in the range of $75 to $150. If the BLDC indoor fan motor requires replacement, parts and labor combined generally range from $150 to $400 or more depending on the specific model and local labor rates. A failed control board can push costs higher, often in the $200 to $500 range for parts alone.

Some causes of the C8 error are accessible to a careful DIYer. You can safely power off the unit and inspect the indoor fan compartment for visible obstructions, and you can check that the CN-Motor1 connector is firmly seated. However, if the fan motor itself has failed or the control board needs replacement, those repairs require handling electrical components and sourcing specific parts, which is best handled by a qualified technician.

A power reset may temporarily clear the C8 code and allow the unit to attempt a restart, but if the underlying cause is still present, the error will return quickly. Physical obstructions and wiring faults need to be corrected before the reset will hold. A reset alone does not fix a failed motor or a damaged connector.