LG Heat Pump Error Code E265

E265 means the discharge temperature sensor assigned to the fixed compressor (compressor 3) has become physically separated or disconnected from its mounting location on the discharge line. The heat pump uses this sensor to monitor compressor outlet temperatures and protect the unit from overheating. The error specifically indicates a physical breakaway condition rather than a sensor electrical failure. The system will not operate normally until the sensor is reseated and the fault is cleared.

You should not continue operating the heat pump while E265 is active. Without a properly functioning discharge sensor on the fixed compressor, the control system cannot monitor compressor outlet temperatures, which removes a key protection against compressor overheating. Running the unit in this condition risks compressor damage that could result in significantly higher repair costs.

If the sensor only needs to be repositioned and reconnected with no parts required, a service call labor cost typically ranges from around 80 to 200 dollars depending on your location and technician rates. If the sensor itself or mounting hardware is damaged and needs replacement, total repair costs including parts and labor could range from approximately 150 to 400 dollars. Costs can be higher if the issue is found during a broader system inspection.

If the sensor has simply come loose from its bracket and the wiring connector is intact, a knowledgeable DIYer may be able to locate the sensor on the fixed compressor discharge line and reseat it securely. However, accessing compressor components in a heat pump typically requires removing cabinet panels and working near refrigerant lines. If there is any wiring damage or if the mounting hardware is broken, professional repair is recommended.

A simple power reset will typically not permanently clear E265 because the control board will detect the missing or unconnected sensor signal again once it restarts diagnostics. The physical cause must be corrected first by locating the separated sensor on compressor 3 and reattaching it securely. After the sensor is properly reinstalled, the error should clear on restart.