go-e Excessive Acoustic Noise from Power Components

Charger emits a loud humming or buzzing noise during charging.

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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

Loose main relay or contactor, Vibrating busbars or coils under load, Supply voltage distortion causing magnetostriction, Failing relay or transformer

How to Fix / Troubleshooting

Note: Some low-level hum is normal, but loud or new noises should be investigated.

  • Identify source: With the cover removed (qualified personnel only) and charger operating, carefully localize the noise to a specific component such as the main relay or transformer.
  • Tighten mounting: Ensure that relays, transformers, and busbars are firmly mounted and that all screws are tight.
  • Check for damage: If a relay or transformer is excessively noisy or shows signs of overheating, replace the component or associated board.
  • Verify supply quality: If possible, measure THD or check for severe voltage distortion from the grid, which may require utility or electrician intervention.
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Repair Difficulty

Medium 3/5

Required Part

Main Power Relay / Transformer
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