LG Heat Pump Error Code P802

P802 indicates that the indoor unit Electronic Expansion Valve (EEV) has experienced a closing error, meaning the valve did not fully close when commanded to do so. LG classifies this as a low level risk fault, so the indoor unit continues to operate normally while the code is active. The EEV is a stepper motor driven valve that meters refrigerant flow into the indoor coil, and the error points to a problem in the valve itself, its wiring, or the PCB driving it.

P802 is classified by LG as a low level risk condition, and the indoor unit is designed to continue normal operation while this code is present. It is not an immediate safety hazard. However, an EEV that cannot close properly may affect refrigerant metering and system efficiency over time, and leaving the underlying fault unaddressed could lead to more significant component wear or a higher-severity fault code in the future.

Repair costs vary depending on the root cause. If the fix is as simple as re-seating a loose connector, the cost may be limited to a diagnostic service call, typically in the range of $75 to $150. Replacing an EEV can range from $200 to $500 or more depending on the model and labor rates. An indoor unit PCB replacement tends to be among the more expensive repairs, often ranging from $300 to $700 or higher including parts and labor.

Some basic checks are accessible to a knowledgeable DIYer, such as inspecting the EEV wiring harness for visible damage and re-seating connectors at the PCB and valve. However, testing stepper motor coil resistance, measuring PCB drive signals, and replacing the EEV or control board requires technical skill and in most cases access to refrigerant-side components that require EPA certification to service. A qualified HVAC technician is recommended for a full diagnosis.

A power reset may temporarily clear the P802 code if the fault was caused by a transient condition such as a momentary wiring interruption or a control board initialization glitch. However, if the root cause is a mechanically failing EEV, degraded coil windings, or a damaged wiring harness, the code will return once the system runs through the operating cycle that triggers the closing check. A reset alone is not a repair and should be followed by a proper inspection.