LG Washer Error Code H8

The H8 error on an LG washer means the wash heater overheating error has been triggered, specifically because the heating element operated without adequate water in the tub. The washer's control board detected this unsafe condition and halted the cycle automatically. The most common starting points for diagnosis are the water level and the heater wash circuit.

No, you should not continue running cycles while H8 is active. The error indicates the heater is or was operating without water, which can damage the heating element, surrounding plastic components, and potentially create a fire or burn hazard. Address the underlying cause before resuming use.

Repair costs depend on which component has failed. A pressure sensor or inlet valve replacement typically ranges from around $50 to $150 in parts, while a heater element can range from $30 to $120 in parts. If professional labor is involved, total repair costs including diagnosis and installation generally fall between $100 and $350, depending on the part and service rates in your area.

Some causes of H8 are DIY-friendly, such as clearing a clogged pressure sensor hose or checking water supply connections and inlet valves. If the pressure sensor, heater element, or control board needs replacement, those repairs require basic electrical testing skills and comfort working with internal washer components. Always unplug the washer before inspecting internal parts.

A power reset may temporarily clear the H8 code, but if the underlying problem is not corrected, the error will return as soon as the washer attempts a heated wash cycle again. Unplugging the unit for a few minutes and restarting can confirm whether the fault is intermittent, but a proper diagnosis of the water level system and heater is necessary for a lasting fix.