MUSTART
Cooling Fan Failure or Obstruction
Charger fan (if equipped) runs very loudly or not at all, even during high‑current 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
Dust buildup in fan, failed fan motor, obstructed ventilation openings, fan control circuit fault on main control board
How to Fix / Troubleshooting
Safety warning: Overheating due to fan failure can damage the charger.
- Check vents: Ensure all ventilation openings on the MUSTART housing are clear of dust, spider webs, or debris.
- Listen for fan: During high‑current charging, you should hear the fan (on models that have one). If not, monitor the housing temperature closely.
- Reduce current: Lower the charging current to reduce heat until the fan issue is resolved.
- Service: A failed fan or fan control circuit requires internal service and possible replacement of the fan or main control board.
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Repair Difficulty
Hard
4/5
Required Part
Cooling Fan Assembly or Main Control Board (Fan Driver)
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