Tristar
Motor Commutator / Brush Arcing (for brushed motors)
Vacuum runs but there is a noticeable spark or flashing visible through vents near the motor.
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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
Worn carbon brushes in motor, Dirty commutator, Overloaded motor due to blockage, Failing motor windings
How to Fix / Troubleshooting
Safety first: Stop using the vacuum immediately if you see large or continuous sparks. Remove the battery pack. Risk of fire or further damage exists.
- Check for blockages: Ensure filters and airflow paths are clear to reduce motor load.
- Short test only: If you must test, run the vacuum for only a few seconds to confirm if sparking persists. Do not continue extended operation.
- Replace motor assembly: Internal motor brush or commutator service is not recommended for most users. Replace the entire Tristar motor assembly.
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Repair Difficulty
Hard
4/5
Required Part
Tristar Main Suction Motor Assembly
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