Milwaukee Mechanical Trigger Failure

Trigger feels loose or does not spring back, and the vacuum will not start.

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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

Broken trigger return spring, Cracked trigger lever, Dislodged trigger pin, Failed microswitch actuator

How to Fix / Troubleshooting

Safety first: Remove the battery before opening the handle.

  • 1. Inspect trigger movement: With the battery removed, squeeze the trigger and feel for resistance. A limp or stuck trigger indicates mechanical failure.
  • 2. Open handle housing: Remove the screws securing the handle halves and carefully separate them.
  • 3. Check trigger components: Look for a broken plastic trigger, missing spring, or dislodged pivot pin. Ensure the trigger properly actuates the microswitch.
  • 4. Replace damaged parts: Install a new trigger lever or spring as needed. If the microswitch actuator is broken, replace the entire trigger switch assembly.
  • 5. Reassemble and test: Refit the handle halves, tighten screws, reinstall the battery, and test operation.
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Repair Difficulty

Medium 3/5

Required Part

Trigger Switch Assembly
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