My nearly-new Kaercher pressure washer has developed a problem... when
I use it with the 'normal' wand (as opposed to the twirly dirt-blaster
thingy), the motor/pump keeps cutting in and out so that I get a
pulsatile flow of about two blasts per second. (I have occasionally
seen this with the twirly wand as well).
What could be causing this? I wondered about a partial blockage in
the wand - would that cause these symptoms? It seems to work
perfectly well when the pump is in its 'on' phase, and I can't see
anything amiss. The water supply by hose is fine I'm sure - it's fed
from a direct mains-fed tap.
Any advice ?
Usually when this happens its because you have a small bit of grit in the
nozzle which is causing the pressure to rise past the relief valve setting.
Best way is to remove the lance from the trigger or nozzle from lance (if
possible) and clean it by applying water backwards through the nozzle. Or
use some bristles from a washing up brush. Don't use wire!
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com ).
Thanks for the advice, all.
Have checked the inlet filter where the garden hose attaches -
Had a prod with some bristles as suggested, but have also discovered I
can actually look down the nozzle of the lance and see daylight right
through it, and so can confirm visually there are no blockages there.
So I'm a bit (a lot) puzzled. Any further ideas anyone?!
Could it be faulty machine? Its a recent enough purchase to be
returned to the supplier, but I don't want to do that unless it's a
Might the fact that I occasionally experience the problem with the
twirly wand be explained by differential pressures in the two wands?
Sorry, I joined this late. I agree with Huge - mine does this all the time
if I use it on too long a bit of hose - a more direct connection fixes it -
also if the pressure is down. Never mind, sounds like you got a replacement
(anti-spam is as easy as 1-2-3 - not)
I have a Karcher as well. I have also been having pressure problems.
My normal routine begins with running water through the section of
hose before connecting it to the Pressure washer, to clear any crud
and air. Remove all kinks and try to make the hose as straight as
possible. Similarly make sure the washer gun hose is also as straight
as possible. This normally resolves really bad pressure problems or
the switching on/off cycle. However mine has started leaking water out
of the plastic vents as well now. Anybody know what this is? I suspect
a gasket of some description needs replacing.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.