Question about Karcher 2500 PSI Pressure Washer

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Water pressure inconsistent

Our home is on a private well system where the water is particularly hard. I have had my washer for about 3 years and more often than not, the pressure coming out of the washer is inconsistent. When using the Karcher Rotary Nozzle, the water comes out as a stream when the trigger is pulled. Numerous pulls of the trigger later, something will change or "let go" and the pressure is correct and the nozzle works as long as the trigger is kept depressed. I don't know if there is a calcium buildup somewhere in the machine that is causing the inconsistent pressure or if there is another reason for the low pressure. Using the other nozzles has the same results, low pressure, numerous trigger pulls, finally the correct pressure as long as the trigger is depressed.
Is there a water filter on the machine that can be cleaned or replaced or is something else wrong?
Thank you in advance for any help you can offer.

Posted by captmike007 on

  • jdb123 Sep 20, 2008

    very similar problem here --- Karcher rotary nozzle just suddenly stuck to a solid stream and haven't been able to unstick it yet



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SOURCE: gas pressure washer

I have the same problem with a Karcher 2400hh.
Go to:
they have the best diagrams and answerss that I have found.

Posted on Jul 06, 2009


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