Alfen
Cooling Fan Control or Bearing Wear
Charger’s internal fan (if fitted) runs constantly at high speed or is very noisy.
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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
Clogged air passages causing high temperature, Failing fan bearings, Faulty temperature sensor reading high, Fan control output stuck on
How to Fix / Troubleshooting
Safety first: Isolate power before touching the fan or internal components.
- Step 1 – Clean vents: Remove dust and debris from ventilation openings and internal fan blades using compressed air or a soft brush.
- Step 2 – Check temperature readings: In the Alfen interface, review internal temperature values. If they are abnormally high or unrealistic, suspect a sensor fault.
- Step 3 – Inspect fan: Spin the fan by hand (power OFF). If it feels rough or noisy, replace the fan.
- Step 4 – Firmware reset: Perform a soft reset or firmware update to clear any stuck control states.
- When to call a technician: If the fan remains on full speed with normal temperatures, a technician should test the fan control circuit and temperature sensors.
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Repair Difficulty
Medium
3/5
Required Part
Internal Cooling Fan
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