LG Heat Pump Error Code E267

E267 is a Sump Sub 1 breakaway error, indicating the temperature sensor mounted on the compressor sump has been detected as disconnected or separated from its mounting point. The control board uses this sensor to monitor compressor base temperature, and when it loses a valid reading, it triggers the fault to protect the compressor. The most common fix is locating the sensor and reattaching it securely to the compressor housing.

No, you should not continue operating the unit while E267 is active. The sump temperature sensor provides critical protection for the compressor, and running without reliable temperature monitoring risks compressor overheating or damage. The system has already halted operation as a safety measure, and it should remain off until the fault is resolved.

A reset may temporarily clear the fault code, but if the sump temperature sensor is still physically detached or damaged, the E267 error will return once the unit attempts to operate and the control board checks the sensor reading again. The underlying cause, which is the sensor separation or failure, must be corrected before a reset will result in normal operation being restored.

A knowledgeable DIYer can attempt to fix this by accessing the compressor compartment, locating the sump temperature sensor, and reseating it firmly against the compressor body. However, working inside a heat pump involves refrigerant components and high-voltage wiring, so caution is essential. If the sensor is properly seated and the fault persists, further electrical diagnosis is best handled by a qualified technician.

If the repair only involves reseating the sensor and no parts are needed, a service call may cost anywhere from $75 to $200 depending on your location and the technician. If the sensor, wiring harness, or mounting hardware requires replacement, total costs including parts and labor could range from $150 to $400. Costs vary significantly based on unit accessibility and regional labor rates.