Tristar
Motor Bearing Wear / Air Leak Noise
Vacuum makes a loud high-pitched whine during operation.
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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 bearings in main suction motor, Cracked or misaligned motor housing, Air leak at dust bin or cyclone seal, Damaged fan blades in motor
How to Fix / Troubleshooting
Safety first: Remove the battery pack before disassembling the vacuum.
- Check for air leaks: Ensure the dust bin and cyclone are fully seated and that all latches are closed. Inspect gaskets for damage.
- Isolate the noise: Run the vacuum briefly without the wand and nozzle to determine if the noise comes from the main body or the floor head.
- Inspect motor area (advanced): If the noise clearly comes from the main body, the motor bearings may be worn. Accessing the motor typically requires removing screws and opening the housing.
- Replace motor assembly: If the motor emits a metallic screech or grinding sound, replace the entire Tristar motor assembly. Bearing replacement alone is usually not cost-effective or recommended for DIY.
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Repair Difficulty
Hard
4/5
Required Part
Tristar Main Suction Motor Assembly
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