E9
Numatic Dust Level / Airflow Sensor Fault

Vacuum stops and error indicator appears when dust bin is nearly full, even though it is not at the max line

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Possible Causes

Blocked cyclone shroud, Dust sensor window contaminated, Misfitted dust bin, Faulty airflow sensor on main body

How to Fix / Troubleshooting

Safety first: Remove the battery and empty the dust bin before cleaning.

  • Empty and clean bin: Remove the bin and empty all contents. Wipe the inside with a dry cloth. Do not use water unless the manual explicitly allows it.
  • Clean cyclone shroud: Brush or tap the cyclone mesh/shroud to remove fine dust that can restrict airflow.
  • Check bin fitment: Refit the bin carefully, ensuring it clicks fully into place. A misaligned bin can affect airflow sensing.
  • Inspect sensor area: If your model has a visible dust/airflow sensor window, gently clean it with a soft, dry cloth.

If the vacuum still reports a full-bin or airflow error with a clean, correctly fitted bin, the airflow sensor or control PCB may require professional diagnosis.

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Repair Difficulty

Easy 2/5

Required Part

Cyclone Assembly
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