How To Correct Pressure Washer Shuts Off When Trigger Released?

Pressure Washer Shuts Off When Trigger Released

If there is a pressure washer in your house, we bet that you’ve had a hard time figuring out how to correct the pressure washer shuts off when trigger released.

That is one of the common troubles you can run into with this type of device. Thus, we are here today to help you address the problem. Let’s dive in with us for your satisfied solution.

What Are Some Popular Roots For A Pressure Washer Keeping On After Its Trigger Is Turned Off?

Before figuring out which method you can apply, you have to clear out why your pressure washer is still working after its trigger is turned off.

There are various causes that make your pressure washer might not turn off properly. However, we want to mention the three most common causes.

Firstly, your machine has some trouble with its unloader valve. Second, the spray nozzle has been forgotten to open, and water keeps spraying out.

The last cause might be due to the trigger, which could be stuck in a certain slot, so it can’t release.

A Pressure washer is no longer an unfamiliar device for most families

What Tools Should You Prepare To Fix This Problem?

After capturing the root of the issue, it’s time to begin addressing it. Below part is the list of necessary tools you need to equip:

  • A wrench
  • A screwdriver
  • Grease
  • Kerosene/ Alcohol

How to Correct Pressure Washer Shuts Off When Trigger Released: 7 Steps

There are 7 steps to fix a pressure washer shut off as its trigger released

Step 1

The first stage is to unplug the pressure valve retaining pin, which locks its unloader with the bay. Let’s detach these two parts with a screwdriver and a wrench.

In general, the majority of pressure washer producers allow their unloader valve to be visible.

So it is not difficult for you to realize a retaining pin is similar to a U-form pin, and this is also the most popular shape in the recent pressure washers market.

Use your screwdriver to insert into the inside of the retaining pin, then tug it up to unclog this pin.

Even if you own a 30000-psi pressure washer which is one of the strongest engines in this industry, your device is not an exception to carry out this step.

Step 2

Now, pull this unloader valve out of its bay with a tender pull and a screwdriver.

Next, inspect the piston that is one of the key sections of your unloader valve to control the pressure retention.

Its basic principle operation is when you operate your pressure washer; the piston will only move in two main directions, backward and forward.

If this rule has a certain issue, this piston can not move smoothly and freely, resulting in your machine not shutting down properly.

Thus, you need to check how well the piston frequently works to clear out whether it is stuck with any trouble or not.

Step 3

If, after checking, you don’t realize any issue with the piston, please skip this stage and move on to the following step. Or else you cannot ignore the next manipulation.

Unplug the piston out of your unloader valve. Release the nut which adheres to the valve with the piston by using a wrench.

Detach the piston and the springs from its unloader valve. Then, utilize kerosene or alcohol to clean them.

Now, lubricate the piston and springs with great silicone grease. After that, put these parts back to their own places. This act will permit the piston and the springs to operate smoothly.

Step 4

Most of the pressure washer has a setting panel for their unloader valve, which allows you to choose the level of pressure subjecting to your requirement.

Now, don’t forget to check this valve set-up to make sure if it has an ideal setting or not yet.

And pay attention to whether the location of your unloader valve is high or low compared to its engine when the trigger is shut off.

The unloader valve has to turn on to boost water back in the direction of its inlet side.

When the unloader valve is clogged, it will increase in high water pressure improperly, which belongs to the common causes of impeding the engine.

Thus, adjusting settings for your valve is an essential manipulation.

Step 5

The unloader valve has a section as a seal or washer with the circle shape called O-rings. Your pressure washer sometimes can shut off because of the trouble with its O-rings.

In case these O-rings are in a poor state, like ripped, degraded, or not adequate to fasten its oil pump, the unloader valve may fail to operate properly.

Being stuck in this situation, you should replace those O-rings with more suitable size ones, which ensures your oil pump sealing properly.

Step 6

It is time to examine your pressure trigger to know its usefulness.

If your machine is not very well in running condition, adjusting only the valve might not offer the perfect outcome you are seeking.

Besides regulating the pressure valve, you can also consider shopping for a new trigger as well.

Step 7

The trigger is a key section of a pressure washer

If you have finished with the mentioned above steps, yet the trouble still keeps remaining with you, try to follow this:

Firstly, examine and wipe the air filter. Secondly, use alcohol to scrub the plug. Then, it’s time to check the water system, especially its inlet and its wand screens.

If everything is working, but the problem is still not getting better, you should think about finding a specific expert or choosing a new pressure unloader valve.


We bet that you already had a satisfactory answer about How to Correct Pressure Washer Shuts Off When Trigger Released, as well as some noticeable notices to avoid other troubles related to the main topic today.

Thank you for reading, and if you feel our blog is useful, don’t forget to share it with others.

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