LG Heat Pump Error Code E268

The E268 code on an LG heat pump indicates a Sump Sub 2 breakaway error, meaning the sump temperature sensor has become physically separated from the compressor. This sensor monitors the thermal condition at the base of the compressor, and when it loses contact, the system cannot obtain valid readings and shuts down to protect the compressor. Reassembling the sensor to the compressor is the first step in resolving this fault.

No, you should not attempt to operate the heat pump while the E268 error is active. The sump temperature sensor protects the compressor from thermal overload, and running the unit without a properly functioning sensor removes a critical safeguard. Continued operation could lead to compressor damage, which is a significantly more expensive repair.

If the sensor has simply come loose and only requires reattachment, the repair cost is primarily labor, typically in the range of $75 to $150 depending on your location and the service provider. If the sump temperature sensor itself needs to be replaced, parts and labor combined generally range from $150 to $350. Costs can be higher if additional wiring or connector repairs are needed.

Begin by locating the sump temperature sensor on the compressor and checking whether it has separated from its mounting position. If it has, reattach it securely to the compressor surface and ensure the mounting hardware or clip is intact. Also inspect the sensor wiring and connector for any damage. If the sensor itself is damaged, it will need to be replaced before the unit will clear the fault.

A reset may temporarily clear the error code, but if the underlying cause, such as a separated or damaged sensor, has not been corrected, the E268 fault will return once the unit attempts to operate. The sensor must be physically reattached and confirmed to be in working condition before the repair is considered complete.