Walli
Overheating / Component Failure
Walli charger produces a burning smell or visible smoke during or after 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 high‑current terminal causing arcing, Failed capacitor or component on main board, Shorted output cable, Overloaded internal contactor
How to Fix / Troubleshooting
Safety first: Immediately turn off power at the breaker. Do not use the charger until fully inspected and repaired.
Steps:
- Do not open while hot: Allow the unit to cool before removing the cover.
- Inspect internally: With power off, open the Walli and look for burn marks, melted plastic, or charred components on the main board, contactor, and terminals.
- Check cable: Examine the output cable for melted insulation or burn marks.
- Replace damaged parts: Any visibly damaged components (main control board, contactor, terminals, cable) must be replaced with Walli‑approved parts.
- Root cause analysis: Verify torque on all terminals and confirm that the charger current limit and upstream protection are correctly sized to prevent recurrence.
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Repair Difficulty
Professional Required
5/5
Required Part
Walli main control board
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