LG HVAC Error Code 67

Error code 67 on an LG HVAC system means the outdoor unit fan motor is not rotating or the control board cannot confirm that it is spinning. The system shuts down when this fault is detected to prevent compressor or refrigerant damage. Diagnosing the code requires checking for 310V DC at the motor connector to determine whether the motor or the PCB is the failed component.

No. When error code 67 is active, the outdoor fan is not operating, which means the condenser coil cannot properly reject or absorb heat. Continuing to operate the system under this condition risks overheating the compressor, causing high refrigerant pressure, and leading to significantly more expensive damage. The system should remain off until the fault is diagnosed and repaired.

A power reset may temporarily clear the fault code, but if the underlying cause, such as a failed motor or PCB, has not been corrected, the error will return as soon as the system attempts to run the outdoor fan. Resetting without repair does not address the mechanical or electrical failure and may allow the system to attempt operation in a condition that causes further damage.

The initial checks, such as confirming the fan blade spins freely and inspecting motor wiring connections, are safe for a knowledgeable DIYer. However, the electrical diagnostics involve 310V DC, which is hazardous and should only be performed by a qualified technician with proper safety equipment. Component replacement, particularly PCB swaps, also requires handling high-voltage capacitors that retain charge even after power is removed.

Repair costs vary depending on which component has failed. A fan motor replacement typically ranges from a few hundred dollars to over five hundred dollars including labor. PCB replacement tends to cost more, often ranging from several hundred to over a thousand dollars depending on the unit model. If both the motor and PCB have failed together, total repair costs can approach or exceed the value of older units.