Walli
Intermittent Thermal or Supply Instability
Walli charger starts charging but frequently stops mid‑session without a clear error code; charging resumes if restarted.
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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 power terminals inside Walli causing heating, Marginal supply voltage drop under load, Overheating of internal components without reaching hard fault threshold, Poor contact in Type 2 connector pins
How to Fix / Troubleshooting
Safety first: Repeated interruptions can indicate overheating or wiring issues. Investigate promptly.
Steps:
- Monitor conditions: Use the Walli app to monitor current, voltage, and internal temperature during a charge. Note when interruptions occur.
- Inspect connector: Check the Type 2 plug for discoloration or heat marks. A hot connector indicates poor contact.
- Check internal connections: With power off, open the Walli and tighten all power terminals (supply and output) to the specified torque.
- Reduce current: Temporarily lower the maximum charging current in the Walli settings and see if stability improves. If so, the supply or wiring may be undersized.
- If issues persist: Have a technician perform thermal imaging and electrical tests. Replace any overheated components (contactor, terminals, cable) as needed.
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Repair Difficulty
Hard
4/5
Required Part
Walli output terminal assembly
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