Question about Karcher 1750 Psi Elec Pressure Washer

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Motor running, water supply adequate but when

Karcher 6.85 motor running, water supply adequate but when trigger pulled, pump not activated

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Clean whole water supply and outlet from all debris, clean inlet filter as well. connect water and pressurise washer, pull trigger and wait about 3sec for pump to activate, if pump do not activate adn you have pressure from nozzle as it will be from main, this determines pressure sensor (it is extremelly rare for pump itself) is damaged.

check if you have still warranty,this will qualify as warranty repair, if warranty is expired, pressure sensor need to be replaced.

if you find my advice useful, please do not hesitate to leave your remarks and vote for me, thanx!

Posted on Jul 31, 2010

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1 Answer

My Karcher 530M runs ok until I release the trigger, then it will not start again unless I switch and allow the water to run through for about 15 secs before switching on again


Hi Cliff:
My experience is that the pump pressures prevent the engine from starting, so we hold the trigger while starting.
My brother has cut a wedge of wood that he uses to jam the trigger open to bypass the problem. It can get a bit wild if the wand is not secured when the unit is started..

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1 Answer

I own a Karcher 3000 pressure washer. There is no water pressure. I've checked the obvious...hose to house, kinks, attachment is tight....Enging runs, no water pressure.


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1 Answer

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1 Answer

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1 Answer

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They have a problem. I removed both valves and lubed with lithium grease as I was told. Unit is now working for how long who knowes.

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