Medisana Overheating of Power Electronics or Transducer

Humidifier base becomes unusually hot to the touch.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Blocked ventilation, Failing power supply components, Transducer running dry, Faulty overheat protection

Safety: Turn off and unplug the unit immediately if it feels excessively hot.

Check water level: Ensure the transducer is always covered with water during operation.
Ventilation: Move the unit to an open area and clear all vents.
Clean dust: Open the base and remove dust from the PCB and vents.
Sensor and PCB: If overheating continues, the overheat sensor or power components may be failing. Replace the base NTC sensor or main PCB as needed. Consider professional service for safety.

Hard 4/5

Main Control PCB

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