LG Air Conditioner Error Code 252

Error code 252 on an LG air conditioner indicates a central controller wrong address error, meaning the address configured in the controller's settings does not match the actual address the system is using on the network. This prevents proper communication between the central controller and the connected units. The issue is a configuration problem rather than a mechanical failure and is typically resolved by correcting the address settings and restarting the service program.

A simple reset alone will not clear error code 252 if the underlying address mismatch is not corrected first. Restarting the service program is a required step, but it must be done after the correct address has been entered in the controller's configuration. If the address is still wrong after the restart, the error will return immediately.

In most cases, resolving error code 252 only requires a technician to correct the address configuration and restart the service program, so costs are primarily for the service call and labor, typically in the range of $75 to $200 depending on location and provider. If the central controller has failed and needs replacement, parts and labor costs can rise significantly, often falling in the range of $300 to $800 or more depending on the specific controller model and installation complexity.

Start by accessing the central controller's settings and comparing the configured address to the address the system network expects. If they do not match, update the setting to the correct address and then restart the service program so the controller can re-establish communication. If the error persists after correcting the address, try power cycling the central controller completely before restarting the service program again.

Error code 252 is a communication and configuration error, not a safety-critical fault involving electrical hazards or refrigerant pressure. However, it does prevent the central controller from managing the system properly, which can result in loss of climate control across the affected zones. It should be addressed promptly to restore normal system operation, but it does not indicate an immediate danger.