Question about Karcher PSI Electric Pressure Washer

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The pressure washer hose blows off when I close the trigger and it is screwed on tight. Whats wrong?

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The first thing is that for sure the screw thread on the machine or at the end of the hose is damaged. Now it seems thar when you close the trigger the machine is not stopping due to a spill valve problem or micro switch problem. You are a bit lucky that the hose blows off, because if the hose stays in place, with this problem...more damage is done to the machine, especially the intake valves. Now the spill valve is a control valve that when there is presure built up, the valve moves and makes off a micro switch. This Spill Valve often gets stuck with detergent or chemical. So the Micro switch stays ON. Thus the machine will not stop...and blows the weakest point. Now you can either service the spill valve or as I do, replace it with a new one. To locate it you have to open the cover, and where there is a wire coming out at a place...there is the spill valve. First check the micro switch...then tackel the spill valve. As a general rule one must always rinse with clear water after using chemicals and soap. If these are left there..problems with the automatic stop of the machine will start to give trouble.
Fulltech.

Posted on Aug 03, 2010

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1 Answer

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Your water inlet may be stopped up. Whether this model only has a screened hose washer or a better filter, pay special attention to that. Be sure the pathway is free and clear.

Take each of poppet valves and while pushing (with a pencil or something) on the part that moves up and the spring pushes it back down - with magnification and lots of light, be sure there isn't a small piece of debris affecting one of those valves. Its easy to miss, so look very closely.

Next, remove the hose from the pump. We are by-passing the entire unit that includes pressure hose, trigger gun, lance, spray nozzle. If it seems to pump a lot of water out of the pump--then the problem is most likely the trigger gun is clogged or the pressure nozzle is clogged. Some trigger guns can be taken apart -- some, not so much. Same with nozzles.

I hope this helps you, Randell. If yes, please take a sec to rate me. Thanks!
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hi,
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hope this helps

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