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Why Does My Pressure Washer Die When I Pull the Trigger? 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. The root cause of a stalling issue is usually a problematic unloader valve.
How do you know if your unloader valve is bad?
If it is inconsistent and you see sudden changes in the pressure, it is clear that your unloader valve has a problem. Other signs include your pressure washer pump running hot and excessive load on the engine. The engine load will quickly increase, and the pump will run hot. And over time, it can even damage the pump.
Why does my pressure washer keep stalling?
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.
Why does my greenworks pressure washer keeps shutting off?
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. While the unit is running look for any water leaks that may cause the unit to turn back on.
How do I know if my pressure washer has a bad unloader valve?
Water leaks and inconsistent behavior are also signs of a potential failure in the near future. González: The typical signal when there is an unloader malfunction is a reduction of flow through the nozzle, which results in pressure loss. Dean: Typical symptom of an unloader failure is a sudden smooth pressure loss.
Do all pressure washers have an unloader valve?
Power washers that have a trigger gun control on them most likely have an unloader or bypass valve.
What is the purpose of an unloader valve on a pressure washer?
The unloader diverts the flow of water from the outlet side of the pump back to the inlet side, causing water to flow in a loop back to the pump under virtually no pressure rather than to the nozzle under operating pressure.
Why does my pressure washer surge when trigger released?
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.
Why does my pressure washer keep starting and stopping?
The stalling of the engine of your electric pressure washer may be because of the bad unloader valve, which is due to the pressure inside the pump becoming greater than your engine’s power to rotate your pump.
Why is my pressure washer spraying without pulling the trigger?
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. If the unloader valve fails to switch into bypass mode, water may continue to flow out of the trigger wand.
Why does my Nilfisk pressure washer keep cutting out?
Problem: The pressure washer cuts out. If your machine cuts out occasionally, it could be because you are using an electric extension cable. Extension cables must always be 13 amp constant rating and no longer than 20 metres. Please check your operating instructions for correct specifications.
How do I know if my pressure washer wand is bad?
Several indicators will show a faulty pressure washer pump. The most common is a leak, pulsating output pressure, and low output pressure. Leaks are often caused by a worn or damaged pump seal. A pulsating pressure indicates that there is not enough water in the pump.
Can you adjust an unloader valve?
Now while the gun is engaged you can adjust the pressure by turning the adjusting knob between the two nuts and the nylock on top. If you adjust the unloader without the gun engaged, when you do engage the trigger parts in the unloader move rather violently and could damage the unloader.
How do I stop my pressure washer from pulsing?
Simply turn off your pressure washer and disconnect the hose. Keep your garden hose attached and allow water to run through it for 20-30 seconds. Turn off your garden hose and reassemble. Try using your pressure washer as normal and see if that fixes the pulsing.
How long can a pressure washer run without pulling the trigger?
You should not run a pressure washer (except professional equipment) for more than five minutes. While the duration may vary from model to model, it should be between 3 and 5 minutes. Leaving your pressure washer running for more than five minutes can result in overheating.
Is it OK to run pressure washer without water?
Although you can start a pressure washer without water, it is not advisable to do it. The water helps to lubricate the pump and help to keep it cool. Without the lubrication and cooling properties of the water, dry starting will cause the pump to wear down quickly.
Do you turn the water on before you start a pressure washer?
It should not be hooked to a potable water source. Turn on the water. The pressure washer hose will fill with water, so it is important to purge the system of excess air before starting the unit. Simply squeeze the trigger on the gun and the air will release.
