LG Heat Pump Error Code E482

E482 on an LG heat pump means the unit has blocked cooling mode operation because the outdoor temperature has dropped below -5°C (23°F). This is a built-in protective restriction, not a component failure. The system enforces this limit to prevent compressor damage and inefficient operation at low outdoor temperatures. Cooling mode will become available again automatically once outdoor temperatures rise above the threshold.

E482 itself is not a safety hazard. It is a protective feature that prevents the system from running in a mode that could damage the compressor under low outdoor temperature conditions. The unit is functioning as designed when this code appears during cold weather.

If E482 is caused by cold weather, there is no repair cost at all since it is a normal operating restriction. If a faulty outdoor temperature sensor is found to be the cause, sensor replacement parts typically range from $20 to $80 depending on the model, with professional labor adding $75 to $200 depending on your location and the technician's rates.

If it is genuinely below -5°C outside, no repair is needed. Simply wait for outdoor temperatures to rise above -5°C and the restriction will lift automatically. If the code appears during warmer weather, inspect the outdoor air temperature sensor and its wiring for damage, corrosion, or poor connections, as a faulty sensor can cause the protection logic to trigger incorrectly.

A reset will not permanently clear E482 if the outdoor temperature remains below -5°C, because the control board will re-check the temperature and re-apply the restriction. If the code returns immediately after a reset during mild weather, this points to a temperature sensor or wiring issue that needs to be diagnosed and resolved.