Homedics
Transducer Driver Circuit Failure
Homedics humidifier display and buttons work but no mist is produced and a faint electrical smell is present.
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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
Burned driver components on PCB, Shorted transducer drawing excess current, Power surge damage to control board
How to Fix / Troubleshooting
Safety: Unplug the unit immediately if you smell burning or see smoke. Do not continue to operate.
Steps:
- Visual inspection: Remove the base cover and inspect the main PCB for burnt components near the transducer output.
- Check transducer: Inspect the ultrasonic disc for cracks or burn marks. Replace if damaged.
- Replace PCB: If the board shows signs of burning or the transducer driver is faulty, replace the Homedics main control PCB. Ensure all connectors are transferred correctly.
- Consider replacement: For low-cost models, replacing the entire unit may be more economical than board-level repair.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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