Question about Karcher 2500 PSI Pressure Washer

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North star petrol pressure washer. working fine, then no high pressure, checked water feed, water filter , pressure relief valve and gun nosall well work sometimes and keep working, when you release the trigger and try in again the pressure gone again. please help, many thanks, richard

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  • Anonymous Mar 19, 2014

    trigger has stopped working water is at high speed until you turn machine off, can you take gun apart and fix

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Sounds like the regulator is sticking or is airbound. loosen the water connection and then tighten it back. Could also be that the trigger gun is faulty or needs adjustment. Hope this helped

Posted on Mar 15, 2009

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Why does my Simpson pressure washer mega shot V3100 continue to build pressure when I release the gun and stays on high speed


There is a thermal pressure relief valve on the pump that opens when the pump starts to heat up.

Jul 04, 2016 | Simpson Pressure Washers

Tip

What is a Thermal relief valve?


The thermal relief valve is a valve that opens when the water inside your pump gets too hot. When you are not pulling the trigger on your gun, the water is circulating inside the pump. After a little while the water starts getting hot from the friction of the moving parts. When the water gets too hot, the heat starts to damage the water seals. What a thermal relief valve does is, at about 145 degrees it opens up dumping the water inside the pump on the ground. As the water pours out, new cool water flows in from the garden hose, cooling off the pump. I personally recommend a thermal relief valve to everyone I sell pumps to. Not all pumps come with a thermal relief valve. For the price (between 10 and 15 dollars) they will save you a lot more than they cost.

on Dec 21, 2009 | Pressure Washers

2 Answers

Why is there no water flow through on pressure washer?


Sounds like a pump failure. Does yours freeze in winter? Need to winterize like cabin plumbing.
Repair/replacement of pump could be close to new unit.

Aug 19, 2014 | Powerboss 2600 PSI Gas - Cold Water...

1 Answer

Why is water continuously coming out of the thermal relief even when the water is cold?


if your pressure is satisfactory then you will need to replace the thermal relief you can plug the port as long as the pump is unloading fine when trigger is released an get a replacement asap thermal relief valve will open when the gun is released for a long duration of time over three minutes.detergent valve inside the barb you may have to assist the ball bearing inside it might be stuck to the o-ring and the siphon it produces is not sufficient enough to cause separation.you can insert a nail small enough and slowly insert it inside the port til you feel it separate.

Aug 18, 2014 | Pressure Washers

1 Answer

Jet stops and water comes out of main unit


water usually only comes out of there if its hot or damaged. if water is hot its ok, check for temperature anomolies, if water is not hot replace temperature relief valve

Feb 27, 2014 | Pressure Washers

1 Answer

Pressure Washer


any leaks from connection at pump to gun and wand assembly if so the valve is detecting leakage and open up again without u squeezing trigger it builds up in the head.if your trigger gun is leaking internally then you will need to replace the gun this unit uses a trap pressure unloader valve

Jul 15, 2013 | Pressure Washers

3 Answers

Power washer stalls after spraying


Your pressure relief valve may not be working. If that happens when you shut off your spray gun, then pump is dead heading, stopping the motor. If this is the case it stops dead, not coasting. Either replace the pressure adjusting relief valve or remove it, and disassemble it and clean it.

Jul 18, 2010 | Honda Pressure Washer PSI 3000

1 Answer

My P11897 washer pump runs until I connect the


Dear Davidandkath,
I am assuming that by feed hose you mean the water supply inlet. Well if you connect the water supply inlet and the gun is closed, then the machine will stop. This is normal. Now if you open the gun and the machine still stays dead...then the control valve that operates a micro switch is stuck in a position that leaves the micro switch off.
So you must open machine and see a spill valve(pressure control valve)...this will have a cap on it with a wire. This wire is feeding electricity to the micro switch. You can lubricate the spill valve, but myself I change with a new one. You must also check that the micro switch is OK. To open the outer cover there are screws which are normaly TORX ..T15 size. Another reason for the machine to stop dead is that the outlet hose is blocked or the wand( Gun ) is blocked.
Regards,
Fulltech.

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1 Answer

Water does not come out of the lance when I squeeze the trigger


HI it sounds like you may just have a blocked jet on the end of your lance. Please remove and clean.

May 31, 2010 | Northstar Professional Series Pressure...

1 Answer

Lost pressure


try this
dissconect hose and lance , and check for water flow through the machine , if theres none or just a trickle then you may have gunk in your inlet filter ( usually a small plastic gauze insert just where the water feed hose connects )
then start machine , check for high pressure flow ( you will see the difference )
its quite common for the nozzle on the lance to become blocked
if all this seems fine but the lance is vibrating then you have a blockage in one or more of your pump valves .

Nov 11, 2009 | Honda Pressure Washer PSI 3000

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