Bush
Airflow Regulation / Sensor Feedback Issue
Cordless vacuum’s motor pulses up and down in speed repeatedly during use, without user input.
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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
Partially blocked airflow path, Dirty airflow sensor, Faulty suction sensor, Loose sensor wiring
How to Fix / Troubleshooting
Safety first: Remove the battery before cleaning or opening the unit.
- Clear all blockages: Check bin, cyclone, wand, and floorhead for obstructions. Clean filters thoroughly.
- Disable auto mode (if available): Switch to manual power mode. If pulsing stops, the issue is likely with the auto-suction sensor.
- Clean sensor area: Locate and gently clean the airflow/dust sensor near the cyclone with a soft brush or compressed air.
- Inspect wiring (advanced): Open the main body and check the sensor connector on the PCB. Reseat it firmly.
- Replace sensor or PCB: If pulsing persists even with clear airflow and clean sensors, the sensor module or main PCB may need replacement.
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Repair Difficulty
Hard
4/5
Required Part
Dust / Airflow Sensor Module
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