LG Air Conditioner Error Code 244

Error code 244 on an LG air conditioner indicates a central controller receive timeout. The central controller did not receive a data transmission from the CNU within the required 3-second window, signaling a breakdown in communication between these two control components. This is a network communication fault and not a refrigerant or mechanical issue. Diagnosis should focus on the CNU, the central controller initialization state, and the communication wiring connecting them.

A power reset may temporarily clear the error if the fault was caused by an incomplete initialization following a power interruption. However, if the underlying cause is damaged wiring or a failed CNU or central controller, the error code 244 will return after the system restarts. A reset should be followed by a thorough diagnostic check to confirm the root cause has been resolved.

Repair costs depend heavily on the root cause. If the issue is a loose wire connection or an initialization reset, a service call diagnostic fee of roughly $75 to $150 may be the primary cost. If the CNU or central controller needs replacement, parts and labor combined can range from $300 to over $800 depending on the specific components and local labor rates. A qualified technician should diagnose the fault before any parts are ordered.

Start by checking the CNU to confirm it is powered and has completed its initialization sequence. Next, verify that the central controller has also fully initialized and is properly configured. Inspect all communication wiring between the two devices for loose connections or physical damage. If wiring and initialization checks pass, one or both components may need to be replaced by a qualified technician.

Error code 244 is a control communication fault, meaning the central supervisory system has lost reliable contact with the CNU. Continuing to operate the system in this state is not recommended, as the central controller cannot properly monitor or manage system behavior without that communication link. Have the fault diagnosed before resuming normal operation.