Nilfisk Unstable Low‑Voltage Supply

Display or indicator LEDs flicker or go dim during use

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.

Possible Causes

Failing low‑voltage power supply, Loose ground connection, Corroded PCB connector, Overloaded accessory circuit

Safety first: Unplug the machine before opening the control housing.

Check connectors: Inspect and reseat all low‑voltage connectors on the main PCB and display board.
Inspect for corrosion: Clean any green/white corrosion from terminals with contact cleaner and a soft brush.
Measure supply voltage: With appropriate safety precautions, measure the DC voltage feeding the display. If it drops significantly under load, replace the low‑voltage power module or main PCB.

Hard 4/5

Main PCB (Control Board)

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