Having problems with your Karcher K2.26 Electric Power Washer ?

Sporadic pressure The pressure on my washer cuts in and out continuously, two seconds of power followed by two seconds of nothing. I have tried to take the lance off to see if it is blocked, but it seems to be stuck fast. Any help would be welcome, thanks in advance.

Answers :

OK. Pulsing on and off is quite common. Unfortunately, it can have several possible causes.\015\012
\015\012If the  machine pulses while you are squeezing the trigger, and there is water coming out of the jet, then most probably the jet is partially blocked. It may or may not be possible to clear it...  \015\012
\015\012If the machine pulses when you are not squeezing the trigger, then there is a leak somewhere. And this is where it can get complicated because there are several points in the pressure system where leaks can occur. The simplest to diagnose (and quite common) is a leak in the trigger itself. If you've got even the slightest drip from the jet while the trigger is closed, then this is the cause of the problem. On some guns you can change the trigger, on others the whole thing must be replaced.\015\012
\015\012If there's no drip from the jet, the next question is: is there any leak coming from the machine itself? Again, even a very slow leak will be sufficient to cause the problem. Basically, a pressure seal has failed and, depending which one (or more), this will allow water to leak from the high pressure side of the system either externally (in which case you'll see it) or internally (back in to the low pressure side, which you won't see).  You may need a professional to sort this out for you.  If so, don't be surprised if they change all the seals in one job because the parts are cheap compared with the labour.\015\012
\015\012I hope this helps. post again if you need more details.
Repair Help & Product Troubleshooting for Karcher K2.26 Electric Power Washer

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