LG Washer Error Code HI

The HI code on an LG washer means the ambient temperature sensor is detecting an environmental temperature above 50 degrees Celsius (122 degrees Fahrenheit). This is a protective alert tied to the surrounding air temperature where the washer is installed, not the water temperature inside the drum. The washer displays this code to prevent damage to internal electronics from extreme heat.

You should not continue operating the washer while the HI code is active. If the ambient temperature is truly above 50 degrees Celsius, running the machine in those conditions can damage the control board, motor, and other electronic components. Address the root cause before resuming use.

If the fix is simply improving ventilation or cooling the laundry room, there may be no parts cost at all. If the ambient temperature sensor needs replacement, parts and labor typically range from around 75 to 200 dollars depending on the service provider and location. A control board replacement, if required, can run considerably higher, generally in the range of 200 to 400 dollars or more for parts and labor.

Start by checking the actual temperature of the room where the washer is installed using a thermometer. If the space is genuinely hot, improve ventilation or move the washer to a cooler location and the code should clear once conditions normalize. If the environment is at a normal temperature, the ambient temperature sensor or its wiring may need to be inspected and potentially replaced.

A reset may temporarily clear the HI code from the display, but the code will return if the underlying cause has not been resolved. If the ambient temperature is still above 50 degrees Celsius, or if the sensor is still faulty, the control board will detect the condition again and redisplay the error. Fix the root cause first, then reset the machine.