Nilfisk Short Circuit / Earth Leakage

Machine trips the building circuit breaker or RCD when switched on

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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

Shorted vacuum or brush motor, Damaged power cable, Water inside electrical compartment, Shorted main PCB

How to Fix / Troubleshooting

Safety first: Do not repeatedly reset breakers. Unplug the machine and keep it disconnected until the fault is found.

  • Inspect for moisture: Check inside the electrical and motor compartments for water. Dry thoroughly and correct any source of leaks.
  • Check power cable: Replace the Nilfisk power cord if there is any sign of crushing or cuts.
  • Isolate components: Disconnect motors and other loads from the PCB one at a time, then power up briefly to see if the breaker still trips. The component that causes tripping when connected is likely faulty.
  • Replace faulty component: Replace the shorted motor or PCB with genuine Nilfisk parts.
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Repair Difficulty

Professional Required 5/5

Required Part

Vacuum Motor Assembly
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