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Excessive Acoustic Noise from Contactor or Power Components
Charger emits a loud humming or buzzing noise during charging, louder than previously experienced.
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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
Aging or loose main contactor, Vibrating transformer or choke on power board, Loose mounting screws inside housing, Overvoltage causing magnetostriction noise
How to Fix / Troubleshooting
Safety: Noise alone is not always dangerous, but sudden changes should be investigated.
- Compare at different currents: Reduce charging current and see if the noise level changes significantly.
- Check mounting: Ensure the charger housing is firmly mounted to the wall; loose mounting can amplify vibration.
- Listen for arcing: If the noise is accompanied by crackling or burning smell, stop using the charger and switch it off immediately.
- Technician inspection: A technician should open the unit, check the contactor and inductive components for mechanical looseness, tighten mounting screws, and replace noisy or failing components.
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Repair Difficulty
Medium
3/5
Required Part
Main Power Contactor / Power Inductors
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