Medisana
Power Supply or Main PCB Failure
Humidifier will not power on at all; no lights or display.
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Safety Warning
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.
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Possible Causes
Faulty external power adapter (for low-voltage models), Blown internal fuse, Defective power switch, Failed main control PCB
How to Fix / Troubleshooting
Safety: Unplug from mains before opening. If you are not comfortable working with mains voltage, seek professional help.
- Check outlet and adapter: Test the wall outlet with another device. For models with an external adapter, test or replace the adapter with the correct Medisana-rated unit.
- Inspect power cord: Look for cuts or damage. Replace the cord if damaged.
- Internal fuse: Open the base and locate the fuse on the PCB or near the power input. If blown, replace with the same type and rating. If it blows again, there is a deeper fault.
- Power switch: Test the on/off switch for continuity when pressed. Replace if faulty.
- Main PCB: If all above are good and there is still no power, replace the main control PCB.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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