Kärcher Mechanical Trigger or Valve Failure

Handle trigger feels loose or does not activate spray.

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Possible Causes

Broken trigger lever, Disconnected trigger linkage, Faulty mechanical solution valve, Stuck trigger microswitch

How to Fix / Troubleshooting

Safety first: Unplug the unit before opening the handle assembly.

  • Inspect trigger mechanism: Open the handle housing and check the trigger lever and linkage for cracks or dislodged parts. Replace broken components.
  • Check valve actuation: Ensure the trigger properly operates the solution valve or microswitch. Adjust the linkage if there is excessive free play.
  • Test microswitch: If your model uses an electrical trigger, test the trigger microswitch for continuity when pressed. Replace if faulty.
  • Reassemble and test: Refit the handle covers and test spray function with water.
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Repair Difficulty

Easy 2/5

Required Part

Trigger Microswitch
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