LG Heat Pump Error Code E261

E261 on an LG heat pump indicates that the digital compressor discharge sensor has separated or broken away from its mounted position. The discharge sensor monitors the temperature of refrigerant exiting the compressor and is critical for protecting the unit from overheating. When the control board detects that this sensor has come loose or is no longer reading correctly, it triggers E261 and shuts the system down as a safety measure.

No. The E261 error causes the system to shut down precisely because running the compressor without accurate discharge temperature monitoring risks serious compressor damage. You should not attempt to bypass or ignore this fault. Leave the unit off until the sensor has been properly inspected and reassembled.

If the sensor only needs to be repositioned and secured, labor costs are typically the main expense, generally ranging from around $75 to $200 depending on your location and the technician's rates. If the discharge temperature sensor itself needs replacement, parts costs typically add another $20 to $80 to that total. If the wire harness or connector is also damaged, the overall repair cost could be somewhat higher.

In many cases, the fix involves locating the discharge sensor near the compressor and physically reseating it in its proper mounting position, which a knowledgeable DIYer may be able to perform. However, accessing the compressor area of a heat pump requires opening the unit, and the repair should only be attempted by someone comfortable working with refrigeration equipment. If the sensor wiring or connector is also damaged, a qualified technician will be needed to replace those components.

A simple reset is unlikely to permanently clear E261 because the underlying issue is a physical sensor displacement rather than a software or communication glitch. The system will detect the same fault condition again once it powers back up if the sensor has not been reattached. The sensor must be physically repositioned and secured before a reset will be effective.