Beurer humidifier is running but there is no visible steam or mist, only airflow.

Safety: No internal work is needed initially; keep the unit plugged in only while adjusting controls.

Steps:

• Check mode selection: On combination models, ensure that humidification mode is enabled and not just fan or air cleaning mode.
• Verify water supply: Fill the tank fully and ensure it is correctly seated. Listen for the sound of water transferring into the base.
• Check for low-water indication: If a low-water icon is lit, follow the water level fault procedure (see 'Lo' / E3).
• Reset the unit: Turn off, unplug for 5 minutes, then restart and reselect humidification mode.

If the fan runs but the transducer or heater never activates despite correct water level, the control board or level sensor may be faulty and require professional diagnosis.