SOURCE: karcher kb 2020
a/c or gas? if a/c you probably have a bad switch. if gasoline you could have no connection to kill wire to coil or the switch is bad.
SOURCE: Karcher 3.97M Short cycles after trigger is released.
Dear csdamman,
There is a valve called the spill-valve. It is often called the control valve. This valve activates the micro-switch. When the gun is released, pressure builds up and compresses this spill valve. At the same time it puts off the micro-switch. This will then stop the machine. Now when the spill valve is faulty it cannot hold compreesion under pressure so it starts de-compressing and starts the machine again. This goes on in a cycle as you explained. So you have to change the spill valve. If the spill valve that operates the micro-switch is part of the upper head,...then the whole head must be renewed. Myself I rarely service Spill Valves. The best thing is to renew it. From your explanation it seems that you did not take notice of this Spill-Valve. Infact when you mentioned Pressure Switch, I do not know if you are refering to the spill valve. If you are....then saying that the Pressure Switch moves and operates freely, does not mean that it is OK.
In certain machines in the outlet...there is a small valve, coloured black and red or green and yellow. This sometimes when faulty, it gives the fault you mentioned. Sometimes an inlet valve gives the fault you mentioned. But from my expirience it is most of the time that the Spill-Valve is the fault.
Regards,
Fulltech.
SOURCE: My Karcher KB 9030 has lost pressure and is
In most cases the water lines can have leaks that bring bring in air and so the pressure will be less. Power off the washer and let the water flow without any air bubbles. If you seen bubbles then recheck the joints.Check the same with the outlet.
If not there is fault on the main pressure pump.
SOURCE: Karcher k3.575 high pressure quick connect high pressure hose not locking
clean out the dirt and check the hose support that likes to slides down to the end of the hose
SOURCE: karcher pressure washer leaking oil
Usually electric pressure washers only have oil on the pump, so its very likely that you will find the problem there. I'd say check all the pump seals and if that doesnt solve the problem, you can check to see if all bolts are tight when you close the pump back.
If by any chance you are looking for a new machine and/or parts for your machine, log in to www.roncoshop.com where you will be able to find pretty much anything for your preassure washer.
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