Kärcher ST 120 - User Manual

Questions and Answers

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Curtis WilsonAug 6, 2025
What to do if air comes out of my Kärcher Power Tool, but no spray medium exits the nozzle?
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  Theresa MedinaAug 6, 2025
  If air is present but no spray medium is coming out of the nozzle, the spray medium may be wet or there may be a blockage. Try pressing the muzzle of the spray nozzle against a flexible base and pull the pistol trigger to redirect the air flow and clean the parts. If this doesn't work, clean the suction hose, suction pipe, and mixing chamber, or change the spray agent. Also, ensure external air isn't being sucked in by tightening the hose clips at the spray agent hose and closing the spray agent control.
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Katherine AliAug 16, 2025
Why is there no water admixture in my Kärcher ST 120 Power Tool despite water supply?
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  Mary ChavezAug 16, 2025
  If there's no water admixture despite a water supply, first check that the selection switch for water is in the ON position and that the water volume control button is open. Also, ensure that the water pressure is greater than 0.2 MPa (2 bar). If these aren't the issue, the water system may be blocked. Dismantle the water hose without closing the water supply, dismount the injector, turn the water volume control button to maximum, press the muzzle of the air nozzle against a flexible base, and pull the pistol trigger to blow out the water system with compressed air. If the problem persists, dismount the water valve.
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Gary DavisAug 26, 2025
How to fix no air in my Kärcher ST 120?
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  fcisnerosAug 26, 2025
  If there is no air in your Kärcher Power Tool, check the connection on the compressor and ensure the locking tap is open. A possible cause is a closed stop valve on the compressor. If the issue persists, the compressor may be defective and require repair.