Question about Karcher K2.26 Electric Power Washer

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Loss of pressure

My Karcher 411A has not got the pressure it used to have any clues as what it might be

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Give me a more detailed explanation of how this happened and what you've tried

Posted on Jun 14, 2009

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Posted on Jan 02, 2017

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1 Answer

What will it cost to make my karcher k3.86 pressurewasher pressurize again?


what will it cost to fix your car ? It depends what is wrong with it.
Is the engine bogging down? Are the inlet and outlet valves seating properly? Is your unloader valve working properly ? Are your pressure seals worn? All of those things could cause loss of pressure . All are different price to fix

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Loss of pressure


Check for possible loose connections, its possible it could be leaking which would cause the loss of pressure.

Aug 09, 2009 | Karcher K2.26 Electric Power Washer

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I have tried to use my Karcher washer model 411A using the suction tube which is immersed into Patio cleaner bottle but it does not work what am I doing wrong


you have to lower the pressure at the lance for the detergent to be drawn into the hose. It works on a venturi principle.
on the lance you will have to twist or pull back the end for it to go into low pressure mode.

the easiest way to check it is working is to take out the lance extension , the bit that fits into the trigger on a bayonet fitting. run the machine and see if it then draws in detergent.

If it doesnt draw detergent then look to see if there is a detergent valve fitted to the filter that goes into the bottle and check that it is fully open. sometimes ther is a non return valve fitted into the filter too.
it could be that this non return valve has stuck. A poke with a bit of stiff wire should free it off its seat if it is that problem.

hope this helps a little

Jul 17, 2009 | Alfred Karcher Pressure Washer

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May 04, 2009 | Karcher PSI Electric Pressure Washer

1 Answer

My karcher pressure washer has lost its water power


I have the same problem. With mine I have to remove the tip that I am using then pull the trigger and then replace the tip and pull and pressure should return. I believe that one of my valves is sticking causing me to reprime the pump frequently. I am trying to clean or replace my valves to fix the problem.

I hope this helps.

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1 Answer

Karcher pressure washer 411A. loss of pressure...


411a when i turn on it gos for 1 min then i have too press it on and off 3or 4 times befor it works and it only stays on for 1 min.

Mar 07, 2009 | Karcher K2.26 Electric Power Washer

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