Pressure Washer Advice – What To Do If Your Pressure Washer Has No Pressure!

If your power washer is not spraying water at high pressure, the first and most obvious thing to check is the water supply going into the machine. Most washers require a continuous water supply of about 4L per minute to operate normally. Many pressure washer manufacturers recommend using a ¾” diameter hose instead of the much more common 5/8” diameter hose to supply water to the pressure washer. Check for any kinks or blockages in your hose. If there are none, detach the hose from the inlet valve on the washer and check to see if the water output is sufficient and that there is no debris caught in the inlet filter screen that may be restricting the flow of water into the washer. Some water sources, like a well, can vary in their output over long periods of time. It is important to ensure that the water supply going into the washer is sufficient before moving on to investigate any problems internal to the power washer. Most of the time the pump and unloader valve are not causing the problem. Here are a few things to check before you consider it a lost cause.

Change Your Nozzle

Selecting the correct pressure washer tip is one of the most integral things that a user must consider when cleaning. There are 4 main tip sizes, with each one being used for different surfaces and materials. There are also rotary nozzles and chemical injectors that each serve their own separate purpose. If your pressure washer has no pressure, start by changing your nozzle to a brand new tip. Nozzles can wear as water, chemical and mineral deposits pass through them. A power washer must always have fresh nozzles on hand. Change your nozzle and look to see if your pressure has returned.

Flush Your Nozzle

If the new nozzle does not solve your problem, remove your nozzle and your downstream injector and run clean water through the system to flush out debris. Watch to make sue that you have a steady stream. The water should run clear. As your hoses are dragged on the ground or in storage debris can clog the nozzle.

Check Your Inlet Filter

If you are still having a problem check your upstream side of your pump. Check your inlet filter to make sure it is clear. Usually there is a screen filter covering the inlet fitting. There may be debris in the hose or in the filter. Rinse the filter and knock out debris from the hose. Look for corrosion or debris that may be blocking the outlet. Flush out the garden hose. Then check your water flow again to see if it is steady. Put on a new nozzle.

Look for Leaks

Check your gun to make sure it is not leaking anyplace. Run water through your machine and look for leaks. Always bring extra O-rings and seal tape. If everything checks out A OK then leaks are not the problem

Check Your Engine Belt

Check your belt if you have a belt drive system. A lose belt will not transfer power properly. The engine could be fine, but the belt might not be turning the pump like it should. Is your engine throttle control adjusted correctly?? Most engines are designed to run at full throttle.

Check Your Pop-Off Valve and Thermocouple

If you pop-off valve is popped you may an issue with your uploader. If your thermocouple is leaking you may have burnt your packing. Check your pump oil. It should be clear. Make sure no water is in your oil. That may indicate a leak inside your pump. Change your oil immediately if you suspect water in the oil.

NOTE: This is not meant to be comprehensive list. It is the power washer equivalent of turning it off and turning back on again. If these thing do not reestablish pressure and flow, you may have a bigger issue. Give our experts a call we can help you find a solution to the problem.

Contact us (513.874.4484) for more information!

PSI logoAbout Pressure Spray, Inc.

Pressure Spray Inc. (PSI) has been serving Greater Cincinnati, Northern Kentucky, and Southeastern Indiana as a distributor of pressure washers, parts cleaners, and chemical cleaners for over 30 years and service more than 3,500 customers.
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