LG Air Conditioner Error Code E369

E369 indicates a DC voltage sensor error on the inverter PBA2 board of your LG air conditioner. The system monitors the DC-Link voltage, which is the internal DC bus used to power the compressor drive circuit. When the sensor reading is out of range or missing, the unit shuts down and displays E369 to prevent compressor damage. Diagnosis starts with checking the power supply and the DC-Link voltage connections on the inverter board.

No. The E369 fault causes the unit to shut down the compressor as a protective measure, so the system will not operate normally while this error is active. Attempting to repeatedly restart the unit without diagnosing the underlying cause could stress other components in the inverter circuit. Leave the unit powered down and have it inspected before resuming normal operation.

Repair costs vary depending on the root cause. If the fix is simply reseating a loose connector, labor costs may be modest, typically in the range of $75 to $150 for a service call. If the inverter PBA2 board requires replacement, parts and labor combined can range from $250 to $600 or more depending on the unit model and regional labor rates. Getting a diagnostic assessment before committing to a repair is advisable.

Checking the incoming power supply voltage is something a knowledgeable homeowner can do, but inspecting and servicing the inverter PBA2 board involves working near high-voltage DC bus capacitors that can retain a dangerous charge even after power is disconnected. It is strongly recommended to have a qualified technician perform the inverter board inspection and any repairs. Incorrect handling of the DC-Link section can cause serious injury.

A power reset may temporarily clear the fault code, but if the underlying cause such as a loose connection, failing capacitor, or defective sensor circuit on PBA2 is still present, the error will return quickly. A reset is not a repair. The fault should be fully diagnosed and the root cause corrected before the unit is returned to service.