LG Air Conditioner Error Code CH10

CH10 on an LG air conditioner means the indoor unit's BLDC fan motor has been detected as locked or stalled. The control board monitors the motor's rotation and triggers this code when the fan is not spinning correctly. The unit shuts down to prevent electrical damage from a stalled motor. The cause can be mechanical, electrical, or related to the motor itself.

A reset may temporarily clear the CH10 code, but the error will return if the underlying problem is not resolved. If the fan is mechanically obstructed or the motor is faulty, the unit will detect the fault again as soon as it attempts to operate the fan. Resolve the root cause before relying on a reset to restore normal operation.

Repair costs vary depending on the cause. Clearing a simple obstruction may cost nothing beyond a service call fee, which typically ranges from $75 to $150. Replacing the indoor BLDC fan motor generally costs between $150 and $400 including labor. A faulty PCBA replacement can range from $200 to $600 or more depending on the model and parts availability.

Some causes of CH10 are DIY-friendly. You can safely turn off the unit, visually inspect the blower wheel for obstructions, and gently rotate it by hand to check for blockages or stiffness. You can also check that all visible wiring connectors are fully seated. However, if the motor has failed or the PCBA needs replacement, those repairs are best handled by a qualified technician.

No, you should not continue running the unit while CH10 is active. A stalled BLDC motor can draw excessive current and generate heat, which can damage the motor windings and the control board over time. The unit's built-in protection is designed to shut down and prevent this damage, so allow it to remain off until the fault is diagnosed and corrected.