Tristar Mechanical Trigger / Switch Mechanism Wear

Vacuum trigger must be held very hard to keep the unit running, or it sticks in the ON position.

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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 trigger pivot, Broken return spring, Debris lodged around trigger, Deformed trigger plastic from impact

How to Fix / Troubleshooting

Safety first: Remove the battery pack before working on the trigger area.

  • Clean around trigger: Use a soft brush or compressed air to remove dust and debris from around the trigger opening.
  • Check trigger movement: Press and release the trigger repeatedly with the unit off. It should move smoothly and return fully.
  • Internal inspection (advanced): If the trigger sticks or requires excessive force, open the handle housing to inspect the trigger mechanism and spring. Replace any broken or deformed parts.
  • Replace trigger assembly: If individual parts are not available, replace the entire Tristar handle/trigger assembly.
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Repair Difficulty

Medium 3/5

Required Part

Tristar Handle Trigger Switch Assembly
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