LG Air Conditioner Error Code E163

E163 indicates either an incorrect or missing remote controller option input on the indoor unit, or an EEPROM data error on the outdoor unit. The EEPROM is a memory chip that stores essential system configuration data. When this data is corrupted or missing, the system cannot initialize properly and displays E163. Both causes require inspection by a qualified technician.

E163 is a configuration and memory error that typically prevents normal operation rather than creating an immediate safety hazard. However, continuing to attempt operation with a corrupted EEPROM or misconfigured control board can stress components. It is best to leave the unit off and have it diagnosed promptly to avoid additional damage.

A power reset may temporarily clear the error display, but if the underlying cause is EEPROM data corruption or a persistent configuration mismatch, the error will return upon startup. Resetting does not repair corrupted memory or fix incorrect option switch settings. A full diagnostic inspection is needed to resolve the fault permanently.

Some basic checks, such as verifying dip switch or jumper settings on the indoor board and inspecting communication wiring for loose connections, can be done by a knowledgeable DIYer. However, EEPROM failures and PCB replacements require technical expertise and access to the correct components. If the error persists after checking connections and settings, professional service is recommended.

Repair costs vary depending on the root cause. If the issue is a simple wiring or configuration fix, labor costs may range from around 75 to 150 dollars. If the outdoor unit PCB requires replacement due to EEPROM failure, total repair costs including parts and labor can range from 300 to 700 dollars or more depending on the unit model and local service rates.