Kärcher Leaking Solution Valve or Residual Pressure

Solution drips from spray jets even when trigger is not pressed.

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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 solution valve seal, Debris in valve seat, Excessive pump pressure, Incorrect storage with tank installed

How to Fix / Troubleshooting

Safety first: Turn off and unplug the unit. Remove the fresh water tank.

  • Relieve pressure: With the unit off, pull the trigger to release any residual pressure in the solution line.
  • Inspect valve: Access the solution control valve and check for debris or damage to the internal seal. Clean or replace as needed.
  • Store correctly: When not in use, remove the fresh water tank to prevent constant pressure on the valve.
  • Check pump control: If the pump runs continuously instead of only when triggered, inspect the control PCB and trigger switch for faults.
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Repair Difficulty

Medium 3/5

Required Part

Solution Control Valve
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