LG Air Conditioner Error Code E346

E346 indicates an operation failure of the second outdoor fan motor (Fan2) in your LG air conditioning system. The control board has detected that Fan2 is not running as expected, which can be caused by a motor fault, wiring issue, or board problem. The system shuts down to prevent damage from inadequate condenser airflow. A technician should perform winding resistance checks and a physical inspection to pinpoint the cause.

No, you should not continue operating the unit with an E346 error active. Without Fan2 functioning, the outdoor condenser coil cannot reject heat efficiently, which can cause high-pressure faults, compressor overheating, and premature component failure. A ground fault in the motor also presents an electrical safety risk that requires immediate attention.

Repair costs vary depending on what has failed. A replacement outdoor fan motor typically runs in the range of $100 to $300 for the part alone, with labor adding to the total. A control board replacement can cost $150 to $400 or more for the part. If the fault is simply a loose or damaged wiring harness, repair costs may be limited to labor and minor parts.

Some basic checks, like clearing debris from the outdoor fan blade or re-seating a loose wiring connector, can be done safely with the unit powered off. However, measuring motor winding resistance and chassis-to-ground insulation requires a multimeter and electrical knowledge. Motor or control board replacement involves working inside the outdoor unit and should be handled by a qualified technician.

A power reset may temporarily clear the fault display, but the error will return if the underlying motor or wiring problem is not corrected. Repeated resets while the fault persists can cause additional damage to the compressor or outdoor board. The root cause must be diagnosed and repaired before the system will operate reliably.