LG Refrigerator Error Code HI

The HI code on an LG refrigerator means the ambient temperature around the outside of the unit has been detected at above 50 degrees Celsius (122 degrees Fahrenheit). This reading appears in the outside temperature area of the LCD display. It is primarily an environmental alert rather than an internal component failure. Addressing the temperature of the room or space where the refrigerator is located is the first step.

The HI code itself is a warning, not an immediate emergency, but the underlying cause can be serious. When ambient temperatures exceed 50 degrees Celsius, the refrigerator cannot cool efficiently, which means food inside may not stay at safe temperatures. Address the environmental conditions promptly to prevent food spoilage and avoid long-term strain on the compressor and other components.

If the error is due to an environmental issue like a hot room or poor ventilation, there is no parts cost involved. If the ambient temperature sensor is faulty, sensor replacement parts typically range from around 15 dollars to 60 dollars depending on the specific model, with professional labor adding another 80 to 150 dollars if a technician is needed. Control board replacement, if required, is more costly and generally falls in the range of 150 to 400 dollars for parts alone.

Start by checking the actual temperature of the room or space where the refrigerator is installed using a thermometer. If the space is genuinely very hot, improve ventilation, remove nearby heat sources, or relocate the refrigerator to a cooler area. If the environment is not excessively hot, the ambient temperature sensor may be faulty and should be tested and replaced if defective.

A simple power reset will temporarily clear the HI display, but the code will return if the ambient temperature around the unit remains above 50 degrees Celsius. The reset does not resolve the underlying condition. The error will only stay cleared once the environment around the refrigerator is brought within an acceptable temperature range, or the faulty sensor is replaced if that is the cause.