igger to “prime” high pressure, then quickly put nozzle back in then it would work. now it doesn’t work at all.
Karcher G2400HH-R Pressure Washer

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If the machine is pulsing when on standby, is the garden hose supplying the pressure washer fully uncoiled? If the machine is pulsing whilst in use, it may be that the accessory you are using has a blockage. Clear by soaking the accessory in warm soapy water and then rinsing out under the tap.
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.
Pressure may decrease if your packing is worn out or if there are abrasives or severe cavitation (bubbles) in the pumped fluids. This can be caused by an inadequate amount of water and/or a lack of proper filtration. To fix, install the proper filter.
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.
Low water pressure in a kitchen faucet is often fixed by cleaning the aerator and changing the cartridge. Sediment buildup is common in all faucets, so they should be maintained regularly. Reduced water pressure in kitchen faucets is common due to sediment clogging the aerator or problems with the faucet`s cartridge.
Surging Pressure Washer Troubleshooting Tips

Check that the water supply and inlet screen are unrestricted. Check to see if the water supply does meet the necessary flow rate. If not, discontinue using the pump, because it will suck air, causing cavitation that can damage the pump`s parts.

PLEASE NOTE: You should always press the RESET button on the GFCI before using the pressure washer.
Here`s how it works, devices from the Home & Garden range can be repaired in our repair centres. Machines within their warranty period are repaired free of charge subject to our Home & Garden terms and conditions.
Air Can Get Trapped in the Pipes

If air is trapped in the pipes, it will cause sporadic water pressure. The air causes the water in the pipes to flow inconsistently. Air can become trapped in the pipes in a variety of ways, such as a bad check valve at the pump.

A quick and easy way to increase water pressure is to adjust the pressure-reducing valve, which can be found in your home, usually close to your water meter. If your pressure gauge reading was low, make slight adjustments to your regulator.
Windows should ideally not be cleaned in direct sunlight. This causes the cleaning agent solution to dry on the window pane too quickly, leaving behind unsightly streaks. Fine dust particles that remain stuck to the squeegee blade can also cause smears.
A surge in pressure within a piping system, known as water or fluid hammer, occurs whenever the linear flow rate of fluid in pipe changes quickly – when pumps start or stop, valves open or close with quick acting actuation devices, or entrapped air moves within the system.
Symptoms of a Failing Check Valve

For example, failing check valves will start to vibrate and even lose some internal parts when problems begin to arise. Other symptoms of check valve failure include reverse flow and excessive component wear and damage. Check valves will also emit noises as they start to break down.

Reset your washing machine

There really isn`t a way to reset the washing machine. What you can do instead is power cycle it: Unplug it (or turn off power at the circuit breaker), wait some time for the electrical charge to clear out of the washer (usually 1 to 5 minutes at most), and then power it up again.

If the pressure washer does not start, then the first thing to check is the fuse in the plug.
These include a clogged nozzle, a blocked inlet water filter, or a malfunctioning pump. It could even be the water supply itself – not the pressure washer. When troubleshooting pressure washers, the best approach is to check the easiest solution first and rule it out before proceeding to more intensive repairs.
Pulsation generally occurs when a liquid`s motive force is generated by reciprocating or peristaltic positive displacement pumps. It is most commonly caused by the acceleration and deceleration of the pumped fluid. This uncontrolled energy appears as pressure spikes.
If water pressure keeps dropping after the pump stops, either your main house valve is leaking and there is water running in the building, or there is a bad check valve or foot valve and water and pressure are returning to the well.
As you might have guessed, a constant pressure system is a piece of equipment that makes sure your water pressure always maintains a certain rate. It doesn`t matter if you are watering the lawn, running a dishwasher and flushing a toilet at the same time—your shower or sink will deliver water at a consistent pressure.
In a constant pressure system when water demand increases, pump speed increases and when water demand decreases, the pump speed will decrease. To maintain pressure in the most efficient way possible the pump only runs as much as necessary to meet demand.
The engine of your pressure washer may rev sporadically because it is experiencing an intermittent blockage of the air that it needs to function properly. The first thing that you should do is to check the air filter for clogs caused by debris or dirt. Clean out any clogs that you find and the erratic revving may stop.
Pulsation generally occurs when a liquid`s motive force is generated by reciprocating or peristaltic positive displacement pumps. It is most commonly caused by the acceleration and deceleration of the pumped fluid. This uncontrolled energy appears as pressure spikes.
The engine of your pressure washer may rev sporadically because it is experiencing an intermittent blockage of the air that it needs to function properly. The first thing that you should do is to check the air filter for clogs caused by debris or dirt. Clean out any clogs that you find and the erratic revving may stop.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

No high pressure. has been a consistant problem for a while. Was able to get high pressure to “kick-in” before by removing nozzle, squeezing trigger to “prime” high pressure, then quickly put nozzle back in then it would work. now it doesn’t work at all.
ANSWER : See this link to fix the problem

Couple of guys tried to help me on this, perhaps you guys could come back. I forgot to mention there is a pressure tank bladder type on the discharge side. Could the air in this tank be messing with the prime. I checked the intake. It has water in it after bleeding air from the discharge system where before it was dry before purging air. I think there is air in the system and wonder if it is coming from the pressure tank?. i open up one of the discharge valves and a lot of air comes out. Should I put a valve on the pressure tank to take it off line until I get water from the well?

Mar 12, 2010 – Could it be the check valve? I took it off and the flap appears to be working correctly. This well has been here a long time. Never given me any problems. I do have galvenized couplers on the discharge and intake sides. Old. Could these be leaking even though they show no sign of water? The discharge is able to hold 30 pounds easily overnight. I do not hear any vacuum in the intake when I take it off. Could the pipe to the well have a leak? I know I would have to insert a sleeve but I do not want to go through the hassle if I do not have to. I had put on a brand new pump from the hardware store that did the same thing so I think that would elliminate the pump as being the problem.
I disconnected it for the winter and rehooked it up. The galvanized couplers on the discharge and pump side are old but do not appear to be leakeing as I taped them well. The check valve seems to be functioning well as I took it off and the flap works correctly. The well is not pulling water. there does not appear to be a vacuum on the check vale when I losen it. could the check valve be bad? I am aware I might have to resleeve the well, but do not want to hassle with this if I do not have to. I want to eliminate everything else first. i put another brand new pump on it to see if it was that. That partiuclar pump which was the same thng did not work either.
I took the pump nose off and looked at it. The one way valve appears to be working fine. The impeller is working fine also evidenced by when I turn it on witht the discharge cap off, water shoots out. When I open one of the discharge valves and turn it on, the pressure drops to 10lbs. At this point the prime water has moved through the pipe and and the pump does not soound like it has any water in it. I pull the cap off and have to “reprime it again.” It again goes back to the pressure gauage rapidly fluctuating while pump on. I disconnect pump on intake side I hear no vacuum. The guage is on the discharge side. The seals on the pump nose do not look frayed or damaged. The pump is not leaking water in any of the joints. The pipes on discharge and well side do not appear to be leaking.

ANSWER : My friend, please boil your question down. Your title has to do with riding mowers but the leaking, bladder, impeller, air bubbles, pressure tank, check valve comments seem to be migrating toward a pump of some kind – well? spa? pool? irrigation?

Briefly, any system that involves a water source, a water moving device, water storage device and ultimate useage is subject to leaks … into the system and out of the system. If this is a well and you have air in your system, your pump may be sucking air at the well or any loose connection between the tip of the pipe and the inlet to the pump. Your bladder could have failed but from what I can get from your comments, this is not the case. On the pressure side, neither air nor water will leak in … only out.

Please recheck all connections. Make sure your check valve is installed correctly and not leaking. The check valve assists the foot valve, which may have failed.

I am more inclined to think your well may be at the end of its useful life. To prove or disprove, you could have a plumber put a vacuum gage on your pump. He or she can answer this question is about 90 seconds based on this test. Expect to pay for one hour of time, which will be less than the time you have already invested in your project.

No pressure Pump reassembly. I purchased a new pump and installed it. Got machine back together and I’m not getting any pressure. What would be the signs if I don’t have the shaft key in properly? Or any other suggestions?
Water comes out of nozzle with pressure for a quick second then no pressure, just water. This is a brand new pump so was curious if I installed it wrong. Wondering before taking it apart again.
ANSWER : No pressure would be a sign that the key was not in properly.

Water pressures varies from high to low. Not idling right
ANSWER : Checked for a problem nozzle, low inlet water pressure to the pump or faulty pressure regulator.

I have a pressure washer that sputer when i pull the trigger. The moter sounds fine but i have pressure then nothing and i have pressure. Thank you Stu
ANSWER : How do i unclog the end of my pressure sprayer it works on low pressure but when i put it on high pressure nothing comes no water comes out.

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

I have a alto pressure washer i have problem with the trigger
ANSWER : GO TOO WAL MART AND SEE IF THEY HAVE A COMPARABLE TRIGGER AND NOZZLE ASSY. REPLACE THE THING WITH SOMETHING DIFFERENT. WHAT YOU HAVE IS JUNK AND WON’T NEVER WORK FOR LONG.

I have a Clean Shot 2050 PSI washer. I can get it to start, but I have very little prerssure. A household shower has more pressure. The garden hose nozzle has more pressure. Any thoughts????
ANSWER : LOOK , THERE IS A FILTER WERE THE HOSE HOOKS UP TO THE UNIT, ITS A SCREEN.. ALWAYS PURGE THE HOSE FIRST BEFORE HOOKING IT UP TO THE UNIT !