LG Heat Pump Error Code E282

E282 indicates a fault with the SUMP TEMP FIXED 1 sensor in the outdoor unit, detected when outdoor temperatures are above -10°C. The error triggers when the sensor signal voltage goes above 4.95V, indicating an open circuit, or drops below 0.5V, indicating a short circuit. Both conditions mean the sensor is returning an implausible reading and the system has shut down to protect itself. The most common causes are a loose connector, a failed sensor, or damaged wiring.

No, you should not continue to operate the heat pump while E282 is active. The fault indicates that a critical sump temperature sensor is not providing reliable data, and running the unit without this protection could lead to compressor damage. It is best to leave the unit off until the sensor fault is diagnosed and corrected.

A reset may temporarily clear the error code, but E282 will return if the underlying sensor fault is not repaired. Since the error is only triggered when outdoor temperatures are above -10°C, the fault condition that caused it is still present and will be detected again once the system runs. A proper fix requires inspecting the connector, measuring the sensor resistance, and replacing any faulty components.

A homeowner can safely check whether the sensor connector is loose or visibly corroded and reseat it. However, measuring sensor resistance and comparing it to a specification table requires a multimeter and some technical knowledge. Replacing a sensor or wiring harness is generally within reach for a skilled DIYer, but if the control board is involved, a qualified technician should handle the repair.

If only the sensor connector needs to be reseated, there may be no parts cost and only a service call fee, typically in the range of $75 to $150. Replacing the SUMP TEMP FIXED 1 sensor itself usually costs between $50 and $150 for the part, plus labor. If the control board needs replacement, total repair costs can range from $300 to $700 or more depending on the model and labor rates in your area.