LG Heat Pump Error Code E152

E152 indicates an indoor unit Electronic Expansion Valve (EEV) close failure. The EEV controls refrigerant flow into the indoor heat exchanger, and this code means the valve failed to close on command. The fault is detected by the indoor unit control board and triggers a system shutdown to prevent refrigerant circuit damage.

Pressing the reset key (K3) is part of the recommended diagnostic procedure and will clear the fault code to allow the system to retry valve initialization. However, if the underlying cause, such as a loose connection or improperly seated coil, has not been corrected first, the error will return. Always address the physical issue before resetting.

Repair costs vary widely depending on the root cause. If only a wiring connection or coil reseating is needed, the cost may be limited to a service call fee, typically in the range of $75 to $150. If the EEV coil requires replacement, parts and labor can range from $150 to $400. A full EEV valve assembly or control board replacement can bring total costs to $300 to $700 or more depending on the model and labor rates in your area.

Some causes of E152, such as a loose wire harness connector or an improperly seated EEV coil, can be identified and corrected by a knowledgeable DIYer comfortable working inside the indoor air handler. However, if the valve or control board requires replacement, a certified HVAC technician with EPA refrigerant handling certification should perform the repair, as the refrigerant circuit may need to be accessed.

No. When E152 is active, the system has shut down because the EEV is not functioning correctly. Attempting to force the unit to run with an unresponsive expansion valve can result in improper refrigerant flow, compressor damage, or further component failure. The fault should be resolved before returning the unit to normal operation.