E23
Walli
Internal Cooling Fan Fault
Walli charger displays E23; app shows 'Fan error' or 'Cooling system fault' on actively cooled models.
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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
Failed internal cooling fan, Blocked air intake or exhaust vents, Fan connector loose on main board, Fan driver circuit failure on Walli control board
How to Fix / Troubleshooting
Safety first: Turn off and lock out power before opening the charger.
Steps:
- Listen for fan: On startup or during charging, the fan should run. If it is silent and E23 appears, suspect a fan issue.
- Check vents: Ensure that all ventilation openings on the Walli enclosure are free of dust, spider webs, or obstructions. Clean with a soft brush or vacuum.
- Internal inspection: With power off, open the housing and locate the fan. Check that it spins freely by hand and that its connector is firmly plugged into the main board.
- Replace fan: If the fan is seized or does not run when powered, replace it with a Walli‑approved cooling fan.
- If a new fan does not resolve E23: The fan driver circuit on the main control board may be defective and require board replacement.
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Repair Difficulty
Medium
3/5
Required Part
Walli internal cooling fan
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