LG Dishwasher Error Code St

St stands for Sanitary and indicates that your LG dishwasher is running an additional UV sanitization cycle after the main wash. This is not an error code and does not indicate any problem with the appliance. The cycle uses an internal UV lamp and runs for approximately 4 hours. To stop it early, simply turn the dishwasher off.

Yes, St is a completely normal operational status. The UV lamp runs inside a closed dishwasher tub, so there is no UV exposure risk to people in the room as long as the door remains shut during the cycle. No action is required unless you want to stop the cycle early.

The St cycle adds approximately 4 hours of low-power UV lamp operation after the main wash, which does consume a small amount of additional electricity. The UV sanitization phase does not use water or the heating element, so the added energy cost is minimal, typically only a few cents per cycle depending on your local electricity rates.

To stop the St cycle before it completes its full 4-hour run, press the power button to turn the dishwasher off, or cut power at the wall outlet or circuit breaker. There is no dedicated cancel button for the St cycle. The dishwasher will not automatically resume the St cycle when powered back on.

Turning the power off will stop the St cycle and clear the display. However, since St is not an error code, there is nothing to "reset" in the traditional sense. The display will also clear on its own once the 4-hour sanitization cycle finishes naturally.