Karcher

Experienced gardeners share their insights in answering this question :
It sounds like there is a leak in the output pipes or the non-return valve on the input to the pump is not sealing properly and allowing any pressure built up to leak back. If there are no leaks in the output pipes then it must be the non -return valve that is faulty. You could try removing the valve an cleaning it but usually once the valve seal is damaged, the only fix is replacement of the valve.

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

The number one cause of low or no pressure when using a pressure washer is a blocked or worn nozzle. Blocked nozzles will prevent water from escaping, while a worn nozzle will allow too much water to pass through, causing the pressure to drop.
A clogged carburetor is most commonly caused by leaving fuel in the pressure washer for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to run stall.
One of the most common reasons a pressure washer won`t stay running is because the spark plug is dirty or damaged. To clean the spark plug, you will need to remove it from the engine and use a wire brush to remove any build-up on the electrode.
Leaks are the biggest contributor to a cycling machine.

Verify if connections are tightened properly. Water leaking from a loose connection can cause the unit to cycle on and off. Verify if the pressure hose has an O-ring at the connection. If missing, this will also cause the unit to cycle on and off.

You may need to rebuild or replace the pump. If the pump is more than a few years old, and you use the pressure washer fairly often, replace the pump. If the pump is relatively new, and you don`t use the pressure washer often, either rebuild the pump or replace the pump seals.
How Do I Tell If My Unloader Valve is Bad? In most occurrences, the first symptom of an unloader valve going bad is no pressure from the wand when the trigger is pressed. This happens when the unloader valve gets stuck open and does not allow water to enter the hose and trigger.
A clogged drain trap can be a common non-mechanical reason for a front-load washer to stop spinning. Lint and small items left in pockets or inadvertently picked up with the laundry may collect in the drain trap. The filter system prevents the items from entering the main drain and clogging or damaging it.
Replace leaking, punctured or rusted hoses. Clean your drain pump every three months to avoid clogging. You might be using more detergent than necessary. In this case, your washing machine will stop and try to absorb the excess foam in its drum.
It is normal for the washing machine to display 1-minute pause for easy care and gentle cycles. After a wash cycle, there is an anti-crease cycle which lasts about 30 minutes. During this remaining cycle, the display will show 1 minute, for example, and the OFF indicator light will illuminate.
A pressure washer stalling when the trigger is pulled is mostly due to a faulty unloader valve, O-rings, pressure washer trigger, or a too-high setting of the unloader valve. What is this? The root cause of a stalling issue is usually a problematic unloader valve.
So, when your washing machine starts getting loud enough that you can`t even hear yourself think and it sounds like your washer might take flight, there`s likely a problem. The most likely contributor is going to be the ball bearings.
If a washer stops mid-cycle, it could be because the pump or the motor that runs it has failed. When this happens, it cannot remove the water efficiently, pump water in, and thus the sensors won`t allow it to move to the next cycle.
Surging occurs when the pressure is fine and then weakens. It is caused when the flow rate for the pump cannot be supported by the water supply. Problems can mount from there so it is important that it is dealt with as soon as possible.
There could be small leaks, holes, or tears in your garden hose or high-pressure hose that are causing your pressure washer to lose pressure when you pull the trigger. If you find leaks, plug the holes or replace the hose, which should solve your pressure issues.
A dirty inlet or discharge valve is the most common cause of a pulsating pressure washer. Dirt or hard water can get caught up in these little divots. It is important that you clean out these pieces every so often to prevent these kinds of problems.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Motor starts, stops, starts, stops etc never running completely. not putting out much water pressure. not building pressure??
ANSWER : Is you nozzle plugged? That is what this sounds like.

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Starts great and sprays great, but will not continue to run when [ stop spraying. It locks up until I release the pressure from the gun.is there a pressure by-pass adjustment I can make?
ANSWER : Tune up motor, replace air filter/spark plug and oil.

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Need help in getting Honda engine on NorthStar pressure washer to run.
ANSWER : Could be low water pressure I have found.Also, I purchased a can of “stuff” at Lowes today which allows you to circulate a liquid substance which lubricates the pressure pump….the pump could be frozen up…I have a rotating nozzle which I bought…and it had frozen up…this stuff works

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This pressure washer will continue to build pressure when you let off the trigger. I have replaced the hose 3 times because the pump continues to pump until it blows the hose. The pump will not stop pumping!
ANSWER : You have a defective pressure release valve or someone has misadjusted.

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1750 psi Electric Pressure Washer: My pressure washer is losing pressure and is pulsa…
ANSWER : If the pressure washer is pulsating then that is a sign of check valve failure. You may be able to clean of replace the check valves. Replacing the head is the wrong way to go. This is completely unnecessary. If you can tell me the model number of your pressure washer then I can assist you better in pointing you in the right direction.

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Honda powwer boss 3000-whenyoupull the handale to spray it kills the engine
ANSWER : Sounds like the unloader (regulator). Try removing the nozzle, the pull the trigger with the engine running. If motor is still running then it could be the Unloader malfunctioning. If you require a new one try a bypass system for the unloader. The bypass will help save the life of the unloader.

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My power washer wouldn’t start. I replaced the spark plug and it started right up. but spray was a bit sporadic and then it began billowing thick white smoke and stopped running?

Any thoughts.

ANSWER : White smoke IS NOT fuel related. you twit! white smoke indicates oil consumption. they let anyone answer these things

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MY 1850 PSI POWER WASHER WON’T START UP. As fast as the motor started, it shut down. And there is still power. What is the problem?
ANSWER : Probably a clogged carb from sitting all winter with fuel it it.

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