LG Air Conditioner Error Code 10

Error code 10 on an LG air conditioner means the indoor unit's BLDC fan motor has failed to send a feedback signal to the control board for 50 consecutive seconds. The system cannot confirm the fan is operating and shuts down as a protective measure. The fault points to the indoor fan motor circuit, which includes the motor itself, its wiring harness, and the main control board.

No. When error code 10 is active, the indoor fan motor is not confirmed to be running, which means the unit cannot properly circulate air over the evaporator coil. Running the system in this state risks freezing the coil and can cause refrigerant or compressor damage over time. The unit should remain off until the fault is diagnosed and resolved.

A power reset may temporarily clear the error code display, but the fault will return within 50 seconds if the underlying problem with the fan motor feedback signal has not been corrected. Resetting the unit without addressing the root cause does not fix the motor circuit and can delay proper diagnosis. The error should be treated as an active fault requiring inspection rather than a one-time glitch.

The first step, checking that the motor connector is fully and properly seated, is a straightforward task that a careful DIYer can perform after disconnecting power to the unit. If the connector is secure and the error returns, further diagnosis involves checking wiring continuity and motor function, which requires a multimeter and some electrical knowledge. Replacing the fan motor or control board is more involved and is generally best handled by a qualified technician.

Repair costs depend on the root cause. If the issue is simply a loose connector, there may be no parts cost beyond a service call, which typically ranges from $75 to $150. A replacement BLDC indoor fan motor generally costs between $80 and $200 for the part, with labor adding $100 to $200 depending on the unit type and accessibility. A main control board replacement can range from $150 to $350 or more for parts alone.