Having problems with your Karcher Pressure Washers ?

Replaced cylinder head due to loss of pressure and leaking. Pressure now back to normal and no leaks but machine does not switch off automatically when lance trigger released...


Answers :

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.
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Suggested Questions/Answers :

I have a karcher 4.6 pressure washer that developed the usual fault.... drop in pressure and leaking from the cylinder head. I have replaced the cylinder head and the attached control chamber. The pressure is now good again and the leak is fixed. Unfortunately now when the trigger on the lance is released the the machine does not switch off automatically. I have bled the machine by letting water run through it


... Karcher Pressure Washers

Replaced cylinder head due to loss of pressure and leaking. Pressure now back to normal and no leaks but machine does not switch off automatically when lance trigger released...


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 m ... Karcher Pressure Washers

Model Karcher 320H 1.141-205 When first switched on the pressure builds up and then the machine keeps no switching on and off, opening the trigger on the lance and it works ok, close trigger and the pulsing starts again, if left like this it would probably burn the motor out. I have lubricated the brass/plastic piston the operates the on/off switch but problem still exists. I have also opened the pump chamber but cannot see any debris or problems with the rubber seals. Any help would be most app


... Karcher 1550PSI Pressure Washer

Have a Karcher kb4040 that continues to run constantly even when the trigger isnt pressed. Also water flows out of the detergant hose when im not pressing the trigger. Pressure seems down slighlty, not much. This happened after i ran water out of trigger gun with no lance attached, machine switched on. Seems to leak from trigger handle aswell. Many thanks in advance


This is two things. One is the back flow check valve to the soap line is leaking. The other is the pressure switch on the output side of the pump. ... Pressure Washers

I have a Pressure problem on my PowerCraft pressure washer. On initial switch-on the machine runs at low pressure. If I then rotate the end of the lance to detergent application mode and then rotate it back to high pressure mode the high pressure kicks in and all is well. Is the lance faulty?


... Pressure Washers

Karcher pressure washer lack of pressure and intermittent noise, when not using the lance, as if pump switches off. When using the machine (K3.99M) it works but lacks pressure.


This sounds like an internal crack in the outlet head, simple to replace and not that dear ... Karcher K2.26 Electric Power Washer

My karcher pressure washer is switching on and off when the wand is not being used. the pressure should hold but it appears to cut in and out every 2 secs. the machine works o.k. when pulling the wand trigger but i think the pressure is slightly reduced.


Unfortunately these little units have this problem commonly, 9 times out of 10 it will be the plastic head on the unit will be cracked and leaking slightly... it builds up pressure then leaks out and tries to build up the pressure again ... Karcher K2.26 Electric Power Washer

Rockworth Powertask Pressure Washer : model no AROW4P seems to rev flat out, hav to put choke in middle to use so not to fast revs. Im sure it used to rev higher and lower according to use of lance. could it be something to do with 3 valve things if so how could i tell if ok. put clean fuel in. oil level ok.another problem is when switched on water comes straight through lance,trigger makes no diffrence. please help


... Pressure Washers

Karcher b302 when switched on it makes a low humming noise, not the same as when it worked. There is no pressure at all when the lance is triggered.


See if you can spin the cooling fan of motor if so you may have a bad capacitor on motor ... Pressure Washers

Karcher K4 Hello, just cleaning my patio been using it for two days and it has stopped pressuring up, water comes through the lance but there is a humming noise coming from the unit when switched on, weather the trigger is pulled or not. Thanks for your time hope you can help. Regards Gareth


It sounds as if you might have an air lock/air bubble in your pump circuit. If you've not already done so, try holding the trigger on your high pressure nozzle for several minutes with the engine OFF. (just your water pressure forcing water through t ... Karcher 2500 PSI Pressure Washer

Turn water on then actuate wand trigger. Pressure washer leaks when wand trigger is actuated and has very low pressure/flow output. After releasing trigger the pressure cycles on - off at approx 1 second interval. I suspect that the plasstic oulet tube is leaking causing low pressure leak out of bottom when trigger is actuated and causes pressure switch to cycle when the trigger is released. Any Help? This pressure washer is approx 18 months old!


You gave a very close solution yourself for the problem. But other leakages can cause such symtoms.Forexample a leaking head or a leaking chemical inlet. These can be caused because the spill valve (pressure control valve) is stuck. When this valve s ... Karcher PSI Electric Pressure Washer

We have a Katcher HDS 3.5/30-4 M Ea. Was using it, stopped using it briefly in the middle of a job, pulled trigger again, and there was a lack of pressure. Went to the machine to troubleshoot. The "engine indicator light" is on. Checked the temperature of machine: fine. Water intake: fine. We have not been running it at high temperatures, but about 50 degrees C. The pressure was at about 2300 PSI before it stopped. Any ideas?


... Karcher Pressure Washers

Pressure washer does not discharge water under pressure until the nozzle has been removed from the lance- press switch and release, refit nozzle and then the water is discharged. Will switch off but does not activate next time.


... Pressure Washers

Honda pressure washer cuts out when lance trigger released.


When you release the trigger the pressure inside the pump rises above\015\012working pressure. Once it reaches a set control pressure (around 20%\015\012higher than working pressure) a sprung loaded piston actuates a switch\015\012thus stopping the m ... Karcher 2500 PSI Pressure Washer

Honda pressure washer cuts out when lance trigger released.


You most likely need to set your valve clearances. If it is hard to\015\012pull over or the recoil snaps back after starting your valves need to\015\012be set for sure. This may not be the entire problem but it is a good\015\012start. Also change the ... Karcher 2500 PSI Pressure Washer

I have an older Landa Pressure Washer. The burner is not working. Once I get the machine running and water flowing to the pressure washer, with the wand pressed, I flip the burner on switch....and nothing...I have no idea how to work on a pressure washer burner. I have been told it could be the igniter, but I don't know how to fix it if it is. Any help is appreciated.


Check for 12V at the igniter connector with the unit running. If you have 12V and no igniter it may be stuck or bad. Thrun the unit off and read continuity across the DISCONNECTED igniter plug / terminals to the igniter. No resistance = open ignit ... Pressure Washers

We have a problem with our Miele G851 SC Plus dishwasher. We have not operated it for over three months as we were away on vacation and also because there were other issues in the kitchen due to some water flooding . Yesterday we switched on the machine and notice that the machine flashes the intake / drain light after a few minutes into the cycle and stops working. we have checked the drain pipe for blockages and also the water pressure is good. I disconnected the machine drain from the


Www.miele.ca/miele/canada/OperatingInstructions/.../G851%2005431311.pdf\015\012\015\012\015\012\015\012 ... Dishwashers

Wgvb2122 pressure washer builds pressure until you pull trigger, then no pressure. Replaced seal kit on plungers, same thing! Replaced unloaded assembly, same thing! Every thing seems to be as it should be and clean. Any ideas before I shoot this machine?


... Pressure Washers

Pressure problem HI, I have very little pressure at the gun end. I have pleanty of water to supply the machine. When I release the trigger it kicks back and forth.


Sorry i am not the one who gave you info from before. but from what you say your problem is water supply. if you don;t have enough to feed the pump it will cavatate. and that is why it surges the way it does. ... Karcher 2500 PSI Pressure Washer

I have an old kew pressure washer and when I pull the trigger on the lance, the water jet is only at mains pressure.


Dear dennis_partr,\015\012In general all pressure washers have a control valve. This is sometimes refered to as the Spill Valve. When the trigger is pulled, the spill valve is in normal position. When the trigger is released, the spill valve c ... Electric Pressure Washers

I have a Craftsman power washer model 580 752020. When I start it up, turn on the switch the electric motor runs fine until I either close the trigger to the spray nozzle or press the trigger for power spray. The electric motor just shuts down, if I take my finger off the pressure and let the water run with no presssure the motor runs fine. My question is this. Is the capasitator on the electric motor the probable cause and is there a way to check out the capasitator to see if it is malfuncti


I doubt that it has anything to do with the capacitor on the motor. i think you are having a problem with the actual Motor Drive circuitry. What is happening is when you close the switch, this tells the Motor to "Ramp Up" to pump the water out, what ... Craftsman Pressure Washers

I have a Karcher 3.99 Pressure Washer. The motor appears to be working and water is passing through the machine when turned to the detergent application setting. However when the lance is tightened to turn on the pressure, no water is coming through. The Karcher is just over 1 year old David


Hi I have a karcher 3.99 the motor comes on and water comes out however thre is no pressure i have tested the lance on my brothers washer and this is ok what is wrong ... Karcher K 5.85 M Electric Pressure Washer

I have a Miele 24 in. G638 Plus Free-standing Dishwasher which is leaking into the pan underneath the machine (and triggering the polystyrene float switch) I am almost certain that the leak is coming from the main pump seal. Is it feasible to replace the seal (it looks like a major job to take the pump assembly apart). I guess Miele labor charges would make the repair not worthwhile Is there a service manual for this machine. I guess I would need it


Hi\015\012\015\012Please check the bellow link to have a detailed view regarding your query…..\015\012http://www.appliance-r ... Miele 24 in. G638 Plus Free-standing Dishwasher

Too hot Water not circulating during wash cycle. Machine will pump out and allows water in. Machine gets very hot if left on - does not switch off automatically. Programmer revolves freely.


Replace bad control board ... Indesit 24 in. D63 Free-standing Dishwasher

On off switch wont stay switched on and ive got no pressure when the lance is attached


... Pressure Washers
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