Question about Karcher K 5.85 M Electric Pressure Washer

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Karcher k 3.99 does not pause correct

When i interupt using my pressure cleaner without shutting it off it should temporary stop. My karcher keeps going shortly on and off in that situation.

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  • 15 Answers

Is there a water leak from the bottom ?
Is so, then there maybe a small crack in the seam of the plastic manifold pump housing or one of the connecting fittings. A New Manifold Complete about $61.00. You may purchase direct from Karcher, and replace if you are mechanically inclined.
If under 1 year old, and you can find a receipt, Karcher will replace the whole Pressure washer under warranty.

Posted on Jul 14, 2010

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SOURCE: karcher k 3.99 does not pause correct

Is there a water leaking from the bottom ? If so then there maybe is a small crack in the Pump Plastic Manifold Housing. A New Manifold Complete Replacement is approx. $61.03 from Karcher, if you are mechanically inclined.
If under 1 year old, and you can find a receipt,Karcher will replace the whole Pressure washer under warranty.

Posted on Jul 14, 2010

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1 Answer

What is this problem - Karcher 3.86 electric pressure washer: humming noise, plug gets very hot, then unit shuts down?


Your pressure washer is either not fitted with a run/stop device in which case like mine you have to switch off within a few seconds of closing the trigger. Check your model features?
The humming noise is the motor stalled out against the pump because there is nowhere for the water to go. The shutoff is caused by the safety overload switching off after overheat.
Or, it has a pressure operated run/stop which is not working. Because water and electricity don't mix, I would suggest getting more specific help. You can download Karcher manuals /spares lists online from Karcher specialists but remember electricity is the silent killer.

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So when you are using the machine & keeping the trigger pulled open the machine builds up to pressure then knocks off all the time.
If this is so the machine is not at fault & is doing what it is meant to do & protect its self from over pressuring & the fault is in the nozzles you are using.
You need to check the nozzle size is correct for the machine & also airline the nozzle to clear of any dirt.
Thanks qwashers

Mar 22, 2014 | Karcher PSI Electric Pressure Washer

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I have a pressure washer, that i start with the choke on. as soon as i shut the choke off it stalls


First thing, if you are using last years gas stop and get some fresh gas, old gas is enemy #1 of small engines. You may need to keep the choke on longer and then only take it half way off. if it does not warm up in a minute or 2 you most probably have a fouled carb. you can try some carb cleaner that you add to the gas and see if that works.

May 06, 2011 | Karcher 2500 PSI Pressure Washer

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Karcher 395M keeps shutting off. Sometimes we can use it by continually messing around with it and plugging and unplugging it until it starts......usually. Is this the cord?


Sometimes this washer shuts off due to a wrongg pressure specially if there is air gaps inthe system. Allow the water to flow thorough without the power switch on and once youhave confirmed a free air lock , power the set.
Now if you wriggle the ccord and the washer fails thenit can be the power cord other wise the problem can be within the motor.

Sep 19, 2010 | Karcher Garden

1 Answer

Why doesn't the unit stop running when pausing while pressure washing, it use to


Hi If you have any leaks on the high pressure side then the unit will keep starting. Please check all external hoses etc and o rings to make sure that they are water tight. The most common one is where you screw your high pressure hose on,there is a o ring inside the coupling that usually wears. Also check all o rings at the trigger and lance. If there are no leaks then it sound like you have a problem with your pressure switch.

Jun 14, 2010 | Karcher K238CCK 1600 PSI 13 GPM Electric...

1 Answer

Karcher k 3.99 does not pause correct


Is there a water leaking from the bottom ? If so then there maybe is a small crack in the Pump Plastic Manifold Housing. A New Manifold Complete Replacement is approx. $61.03 from Karcher, if you are mechanically inclined.
If under 1 year old, and you can find a receipt,Karcher will replace the whole Pressure washer under warranty.

Mar 16, 2010 | Karcher K 5.85 M Electric Pressure Washer

1 Answer

Karcher G3050OH Pressure Washer Spill / Unloader Valve (Bypass)


You should put 'locktite' on the male thread and screw it in all the way and lock it there. That is how it works ,the spring keeps the valve at the bottom closed during high pressure operation. When the gun is released the part with the o-ring is forced down resulting in the valve opening and then the pressure is by-passed.Those dont normally give trouble. Look for a blocked nozzle or a restriction somewhere in your high pressure hose.

Sep 07, 2009 | Karcher 2500 PSI Pressure Washer

1 Answer

I was using the pressure washer and it stopped having high pressure and motor keeps doing a varoom--- pause----varoom----pause and does not stop doing this even with the wand off. Does anyone know what to...


This problem, where the unit continually switches on and off when the handgun is closed, is quite common. Unfortunately it has at least six different possible causes, only two of which are easily checked. 
The first thing you can do is look for leaks.  Even the slightest leak will cause this pulsing because the unit gets up to pressure, switches off, loses pressure, switches back on again, comes back up to pressure, switches off... and so on.  This repeated switching is not good for the motor and should not be allowed to continue for longer than necessary to observe what's happening.
So... 1. Does the handgun shut off completely, or does it drip? If it drips, it may simply be because a seal has failed. The handgun can be dismantled, checked, and any defective parts replaced; be sure to lubricate O-rings with silicone grease when reassembling. As a last resort, the whole gun may need to be replaced.
2. Are there any visible leaks at the high-pressure hose screw connections?  If so, most likely an O-ring needs replacing - again lubricate the new one well with silicone grease.
3. If there are no visible leaks, either from the gun or from the connections, all other possible causes are internal within the cylinder head or control head of the pump. New parts will be needed and this normally calls for a professional repair, although it's not beyond the scope of a truly competent amateur.
I hope this helps. Any further questions, just ask! Please remember to rate this response.

Apr 16, 2009 | Karcher PSI Electric Pressure Washer

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