Why is the air quality sensor always blue in the case of automatic mode?

1. After the automatic mode is turned on, the air will be purified all the time, and the environment will be in an optimal state. If no fluctuation reaches the detection threshold, it will not change color.

 

2. If you need to confirm whether the air quality sensor is working, you can confirm by lighting a cigarette near the AQ sensor on the back of the machine.