Pressure washer will not shut off when water trigger on wand is released

If you are unable to shut off the pressure from the wand, there may be an issue with the unloader valve that is stopping it from switching into bypass mode when the trigger wand is released. The unloader valve is designed to respond to the spike in pressure created when the trigger wand is released, and to divert the flow of water coming from the pump to bypass the pressure hose and flow back into the intake end of the pump. If the unloader valve fails to switch into bypass mode, water may continue to flow out of the trigger wand. This may also cause damage to the wand. If you are unable to shut off the pressure from your power washer, stop the engine and discontinue use immediately. The unloader valve should be removed and possibly replaced if found to be malfunctioning. The inability to stop the flow of high-pressure water from the wand can be dangerous and should be fixed before continuing to use the machine.

I think you have one of two things going on hear, an overpressure problem or a carburetor issue with the engine.

Whoa! Wait when water pressure is at hose you have to pull the trigger on wand to release pressure so the engine can turn freely. It has so much pressure at wand that it will not let you turn enging over. If not It may have froze up. Check the oil first , no oil then it is locked up. If not you can remove pull rope cage and try to turn it manually.

this can be that you need to bleed the system of air or that there is a problem with your trigger gun sticking when you release the trigger.
These are two things I would check before you go into the machine.

This happens when air gets inside the hose. An air bubble of sorts is in the hose and will not build pressure until you blow the air out of the line. Start the pressure washer, turn on the water. pull the trigger on the gun. It will spitter and spatter and come to a trickle. release the trigger on the wand. Pull the trigger again and it will eventually work it self out.

spill valve is stuck and needs to be cleaned and greased common problem....also check all connections for blockage in line

If the engine is off, try unscrewing the hose at the pump. Put on a thick pair of gloves and start to unscrew slowly till you feel some preasure escaping. It should release quickly. You can use a piece of wire brush wire to unplug the nozzle. Wear safety glasses while performing this task, and expect it to happen again. Good Luck Friend.

I'm not real clear on what you're saying, but I think it's that the trigger will not shut down the pressure as it should. It stays stuck on. The other info is how long you've had the washer, but my hunch is that maybe you have hard water, and the deposit build up may be getting the trigger stuck. Try spaying some penetrating oil inside the wand to loosen any deposits that may have built up.

I have a similar problem and diagnosed it to be a problem with the gun. I spoke to a technician that services this pressure washer and he walked me through all the diagnostic steps. The pump is working because there is pressure being built up and the gun sort of works because you can get water out before the washer is started. The technician said that the mechanism inside the gun is either clogged or broken. I am going to Home Depot or Lowes to purchase a new gun and will try it tonight. Guns are only about $30-40. He said generic is fine as long as the thread matches and PSI is in range. Good luck!

common for not starting unless trigger engaged as you are turning the pump as well as engine creating pressure,as for stalling pump has unloader valve which is probably in need of grease(use good silicone grease)this allows water to ciculate when trigger released.