The light will illuminate if the unit runs out of water. If the light illuminates with water still in the unit, try the following: Unplug the humidifier and take off the motor housing. Look for a plastic bobber inside. Wiggle it because it may be a little tight. Put the motor housing back on and turn the unit on.
- When does the refill light come on for the Evaporative Humidifier (model #1115)?