LG Air Conditioner Error Code E573

E573 indicates that the system has detected a single-type outdoor unit where a module-compatible outdoor unit is required. The system reads the outdoor unit's EEPROM during startup to verify compatibility, and this error is triggered when that check fails. It is a configuration mismatch error, not a mechanical or refrigerant fault. A technician needs to verify the outdoor unit model and inspect the EEPROM data to resolve it.

No, continuing to operate the system with E573 active is not recommended. The error indicates a configuration incompatibility that the system has flagged to prevent improper operation. Running the unit under these conditions could result in component damage or unreliable system behavior. The system should be serviced before returning to normal operation.

Repair costs for E573 vary depending on the root cause. If the issue is limited to EEPROM reprogramming, costs may be relatively modest, generally in the range of a standard diagnostic and labor fee. If the outdoor unit control board requires replacement, costs can range from a few hundred to over a thousand dollars depending on parts and labor rates. If an entirely incompatible outdoor unit was installed, the cost of a correct replacement unit will be the primary expense.

In most cases, resolving E573 requires professional service. The diagnosis involves checking the outdoor unit model for module compatibility and reading or reprogramming the EEPROM, which requires specialized tools and training. If the wrong outdoor unit model was installed, a hardware replacement is necessary. This is not a user-serviceable error.

A simple power reset will not permanently clear E573 because the error is tied to the EEPROM configuration data in the outdoor unit. Each time the system initializes, it reads the EEPROM and will re-trigger the error if the underlying compatibility issue has not been resolved. The root cause, either an incompatible unit or corrupted EEPROM data, must be corrected first.