Question about Karcher 2500 PSI Pressure Washer

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No pressure from pressure washer

It starts squirts water without pressure

Posted by kramerconstr on

  • Anonymous May 13, 2009

    I have the same problem. When I pull the trigger there is no pressure other then a stream for a few minutes, then it will work. Then when I let go of the trigger it will take a few minutes agin to start. Please help. How do I fix this problem?



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Do you plan on doing the repair yourself. I need more info, when you supply water to the pressure washer, pull the trigger to purge air from pump, and start the machine. Do you see water coming out from the bottom of the pump? Do you hear the pump working or is it quiet. If you hear a cycling pattern or hear the pump trying to push the water out but it isn't, then you may have a blockage inside the trigger or the spray tip. If the pump isnt building pressure then you may have a pump problem. A stuck check valve, cracked plunger, bad seal, or could be air bound.

Posted on May 12, 2009


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Dear Sir,
This is a problem like the ones I explained. I will write again the explanation.
Dear Sir, What happened is that you have a control valve (Spill Valve)..that when pressure is created it will closes down and puts off electricity by hitting a micro switch. This happens if one leaves a lot of soap in the system or more often the machine is stored under pressure. Never store a power washer under pressure!! Now all one has to do is locate the spill valve ...lubricate or change with a new one. Always lubricate with silicon grease. Also never put on a power washer on without water being fed.
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Regards, Fulltech

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