Question about Karcher K2.26 Electric Power Washer

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I have a Karcher k2.91 high pressure washer. After using it for a few minutes with it working properly with full pressure, it will then not have any pressure.

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6 Suggested Answers

6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 883 Answers

SOURCE: Karcher HD 655 S Does not come up to full pressure

yes...check the check valve. A one-way directional valve, this part is also known as a DUMP valve. It opens when too much pressure builds in the hand wand (when not spraying water) in order to protect the pump, by returning the high pressure to its source reservoir. I suspect the DUMP valve is stuck in open condition (or nearly open).

Posted on Jun 10, 2007

Coldcut
  • 1554 Answers

SOURCE: karcher pressure washer leaking oil

all 4 stroke engines have oil, and 2 stroke can have a oil mixer reservoir to mix with engine gas or to lube the chains , gears, pumps.
If yours is 4 stroke as likely then the oil may be leaking at the seals to the main. (bad news)
Pressure wash it (lol) and locate the leak,
to speed up the leak you can pump some compressed air into the engine (be creative)

Posted on Apr 13, 2008

  • 92 Answers

SOURCE: Karcher electric pressure washer

Dear mike husband,
One reasin for this fault could be a damaged lance or turbo lance. Try by replacing with new ones. If the problem is not solved, then the fault is due to a damaged spill valve. The spill valve could easily be damaged by using not suitable chemical or detergents. After using chemical detergents, one must always rinse the machine by passing pure water. The spill valve could also be damaged by leaving the machine for a long time with pressure in the system. One must never store such machines with pressure still inside. Always press the gun before storing.
Well the solution is to change the spill valve with a new one. In some cases even faulty suction valves can give this problem. But in the majority of cases it is the spill valve.
If you do not know how to fix this problem, it is better to be done by an expirienced technician.
Regards,
MG.

Posted on Nov 05, 2008

  • 92 Answers

SOURCE: trouble with Karcher Pressure washer

Dear Pgarciax,
It is important that you must have mentioned the model number of your Karcher. Just the same I can surely say that your machine's fault lies in the "SPILL VALVE"
When the gun is open and pressure is being produced, the spill valve is in a relaxed position. Also it has at the bottom a valve, which when pressure is produced it is closed. If this does not close due to dirt or corrosion, the pessure goes down. Now when you close the gun,pressure forces the spill valve down to close the electrical system. Now if the "o" rings of the spill valve are damaged, the machine will start going on and off while in stand-by. So if you know how to locate the Spill Valve, all one has to do is change it with a new one.
In some Karcher machines there are 2 spill valves. One regulates pressure and the other one is for switching off the machine when the gun is closed.
Low pressure could also be due to faulty suction or delivery valves. Most probably the suction valves.
But when saying that there are short interruptions while in stand by, I stick to the fact that the spill valve needs renewing.
Regards,
MG.

Posted on Nov 19, 2008

  • 11 Answers

SOURCE: karcher k2 power washer inlet-outlet manifold cracked along weld

well depends did u use it in cold tempatures if so no it was u. if not then most likely or could have been just a crazzy thought here that there was a electrical discharge when it was pluged in and cracked the block on it but honestly thats 1/10000000000000 chance of happening. or it overheated and cracked it but relistically if its new then just take it back and play dumb or if its still under warrenty play dumb and get it fixed. aslo u can search for a new part on craigslist or ebay. last but not least if its not uner warrenty or new to take back or u cant find a part either thru the ones i listed or by calling the man. ur last resort is to just throw it away.

Posted on Apr 03, 2009

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Hi and welcome to FixYa, I am Kelly
The seals do have a tendancy to harden / dry out or... corrosion prevents the unloader bypass valve from moving / operating properly. I recommend you put a little oil (2 oz maybe...) through the unit on purpose via the inlet water connection. Then connect your water hose and force the oil though the unit with the air in the water supply hose while it purges. DO NOT turn the unit on until your sure the water supply hose has purged out all air. Then turn on the unit making sure that you cycle the wand trigger rapidly for a few minutes by cycling the trigger until the high pressure hose is not so rigid then let the high presure hose charge fully again. Cycle trigger wait, cycle trigger wait. 1 second bursts until you get full pressure. Then use normally. This usually wakes up pressure washers that have been resting :)

Thanks for choosing FixYa,
Kelly

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