LG Air Conditioner Error Codes

LG identifies CH04 as a condensate-drainage condition; on ceiling units it can indicate an indoor drain problem, while window and portable units may show it when condensate accumulates.

CH05 indicates a communication problem between the indoor and outdoor units.

CH07 can appear when connected indoor units are set to conflicting operating modes.

CH10 indicates a problem with the indoor-unit fan.

CH34 can indicate an over-temperature condition caused by poor airflow or ventilation around the air conditioner.

CH38 indicates that the air conditioner is detecting low refrigerant.

CH53 indicates a communication problem between the indoor and outdoor units.

CH54 is a reverse-phase or electrical-supply detection condition that can appear after a power outage or electrical work.

CH61 indicates overheating: the outdoor unit can overheat during cooling, or the indoor unit can overheat during heating.

CH66 indicates a communication-line or piping-connection problem between the indoor and outdoor units.

CH67 indicates a problem with the outdoor-unit fan.

CH90 is commonly displayed during a test run and can point to an installation or piping-connection problem.

CH91 is commonly displayed during a test run and can point to an installation or piping-connection problem.

CH93 indicates a communication problem between the indoor and outdoor units; on newer models it can also appear when the outdoor unit is not receiving power.

LG identifies E0 (also shown with CH05/CH53 on some models) as a communication error between the indoor and outdoor units.

LG links E6 to an issue with the indoor unit fan.

LG links EF to an issue with the outdoor unit fan.

The air conditioner detected a low-refrigerant condition or refrigerant-related protection condition.

LG says CH04/FL can occur on window or portable air conditioners when condensate builds up, especially in rainy or humid conditions.

LG says P4 can be a model-dependent display for an over-temperature protection condition also associated with CH61/CH34.

LG says P6 can be a model-dependent display for an over-temperature protection condition also associated with CH61/CH34.

LG says P7 can be a model-dependent display for an over-temperature protection condition also associated with CH61/CH34.

LG says P8 can be a model-dependent display for an over-temperature protection condition also associated with CH61/CH34.