Coway 1018F air speed doesn't change

If the air purifier is operating in Auto or Eco mode, the air speed level cannot be changed.

The air speed can only be selected in manual mode.

To operate the air purifier manually, press the power button to turn on the air purifier then press the air sped button to choose your desired air speed.

If the air purifier is already operating in Auto or Eco mode, press the air speed button once to immediately convert to manual operation.