Nissan
Switch-Mode Power Supply Acoustic Noise
Nissan EVSE emits a high-pitched whine or electronic squeal during standby or 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
Aging capacitors or inductors in PSU, Light-load operation causing audible switching, Loose potting or coil windings, Line voltage slightly out of nominal range
How to Fix / Troubleshooting
Safety first: Noise alone is not usually dangerous, but any burning smell or heat requires immediate shutdown.
- Confirm source: Place your ear near (but not touching) the EVSE to confirm the noise originates from it and not another device.
- Check mounting: Ensure the EVSE is firmly mounted; vibration can amplify coil noise.
- Monitor behavior: If noise is stable and there are no functional issues, it may be acceptable but should be monitored.
- Service if worsening: If the noise grows louder or is accompanied by instability, have the PSU inspected and possibly replaced.
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Repair Difficulty
Medium
3/5
Required Part
Nissan EVSE Low-Voltage Power Supply Module
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