Why is the red light on?

The LED on the front panel indicates the air quality:

• Blue = good
• Orange = average
• Red = poor

When the red LED indicator lights up, it indicates that the air quality is poor. This can be caused by smoke, odors, gases from paints, dust, animal hair, pollen, excessive ventilation, sprays, perfumes or air fresheners. √In the immediate vicinity of humidifiers and ultrasonic essential oil diffusers, the red light may come on because the device identifies water droplets as particles.