Karcher Leaking from Back or inside...Help please

K?rcher UK Good afternoon

The WV does not have a serial number - Please input "000000" Into the "Serial Number" box. Please note - the registration is not validation of your warranty. Your proof of purchase (receipt) will need to be provided, should you have and problems with your machine.

We hope this helps, If we can be of any further help, please do not hesitate to contact us.

Kind regards,
The K?rcher Facebook Team

also:

Where the serial number on the karcher WV window vacuum

Leakage from the machine itself, can be from faulty O ring Gaskets.
If the leaks are from the gun, one can service the gun. Please note that a gun leakage will cause the machine to start and stop many times. These are a few points that I can help you with. If you described from where the leakage is coming, I could be more helpful.
Regards,
MG.

use high quality brass fitting, low quality brass will break also,replace male and female side with matching brands

you may have a faulty unloader valve first remove the fitting the you attach you high pressure hose to inside inspect the checkvalve it may be stuck in the open position free it up reinstall and try again .try not to leave pump over pressurized for more than 3 seconds you will damage the seals.

My karcher 250 pulsates when i turn it on, any idia how to fix it thanks

Several things can cause this problem. It is trying to build up pressure and something is preventing it.

1. check water pressure comming out of the the spicket.
2. Make sure the hose and connectors aren't leaking.
3. make sure there isn't any water leaking from the washer.

If all is ok I would guess the pressure pump has gone out that's the noise you hear pulsating trying to build up pressure.

Terry

Hi. The most likely source of a leak that you can feel is the hose washer where it connects to the washer, if it leaks constantly. I use a mirror to peer behind stuff, and it works pretty well. The easiest way to confirm this is to slide the machine out far enough to see it in action (leaking, that is). Channel locks will usually tighten up the hose, but if the hose and hose washers are old, you should replace the washer. The washer is the same as those used in garden hoses, and can be found at any hardware store. Manuals can be found at the bottom of the FixYa page.
Best regards, --W/D-- please feel free to rate this solution - thanx!

Karcher electric pressure washers typically are supplied fitted with the male half of a standard Hozelock connector. You need the female half secured to the end of your hose, and then they just click together.

Your posting is incomplete, so I'm not quite sure what we're dealing with here.  I understand the machine and the high-pressure hose are Karcher - right?  Is the gun also a Karcher part?  If all are Karcher parts, they should fit unless the screw threads have been damaged.  If they are not all Karcher parts, they will not fit because Karcher connectors are different from almost all others.
Please post again if this doesn't help, giving as much detail as possible, and I'll see what else I can offer.

Hi, I had the same problem, Replaced the O rings and the rubber seals and cups inside the pressure washer and eventually the hose itself burst. Turns out the hose was leaking, internally between the inner sheath and the outside plastic cover, for quite some time and this caused the pulse. New hose and pressure cleaner is as good as new.

most auto stores have high pressure connectors and or machines
to make these connections. Also there are radiant heat connectors
that may or may not fit.