Question about Karcher 2500 PSI Pressure Washer

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B302 - unable to start detergent flowing - How should it work?

Using a Karcher B302 pressure washer, OK on water only, but cannot find out how to add detergent; just putting the detergent pick-up tube in the detergent bottle has no effect.
What should I be doing?

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  • Crossleyan Nov 19, 2007

    Thanks 'The Power' - I thought that was a fault!

  • BulletArmy Feb 04, 2008

    I have the same problem with my karcher 1400 psi pressure washer. I can stick the tube in the bottle of detergent and nothing happens. My grandfather also has one and it doesn't work either.

  • Anonymous Jun 07, 2008

    I have the same problem and I can't see the point of having a detergent suction hose if it 'aint goin' to work. Am dropping the Karcher off at the dump and investing in a different brand.

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It will only pick up detergent if you use a low pressure detergent nozzle - or no nozzle at all. It also takes a while for the detergent to get to the nozzle.

Posted on Nov 19, 2007

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Likewise same problem, then discovered washer must be on low pressure setting for detegent to work, high pressure setting doesn't permit detergent to flow.

Posted on Apr 09, 2012

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