Pressure Washer Loses Pressure When Trigger is Pulled [15 Reasons] – An Ultimate DIY Guide

A minor issue can sometimes cause us to suffer. Despite the fact that pressure of the pressure washer loss is a typical occurrence, it has been experienced by many users that pressure washer loses pressure when trigger is pulled after using it several times. Almost all types of pressure washers have this issue. It is usual for your pressure washer to lose pressure when the washer trigger is pulled if there is an air leak in the inlet pipework. The problem will appear complicated if you do not wish to repair it yourself. The situation isn’t too complicated, and you can swiftly resolve it.

A pressure washer is a common cleaning tool for homes, gardens, and patios. A serious and typical problem is that pressure washer loses pressure when trigger is pulled. When the trigger is pulled, the machine loses its pressure for a variety of reasons. Don’t be alarmed; seek assistance from someone who knows what they’re doing. Simultaneously, understand how to solve the problem so that you won’t have to aid anyone else with similar problems in the future.

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Why Pressure Washer Loses Pressure When Trigger Pulled?

There could be a number of reasons why your pressure washer is losing pressure. Avoid the bother and examine your pressure washer with this list in mind before taking it to the repair shop or buying a new one.

Nozzle that is dirty and ineffective

Low or no pressure when pulling the trigger is caused by dirty or clogged nozzles. Damaged and incorrect nozzles are also to blame. If the pressure washer loses pressure or fails to deliver the desired pressure, the operator should inspect the nozzle first.

Clean it with kerosene or any other ingredient if dirt accumulates. Clean the dirt out of the nozzle using a stick or a pin. Replace the nozzle if it still does not work properly after the obstruction has been removed. Check that the new nozzle is compatible with the machine. It is also preferable to replace the damaged nozzle. It will be tough for a new user to confirm the location of the nozzle. The nozzle is situated at the end of the pressure washer’s trigger wand.

Checking To See If The Unloader Valve Is Restricted

The unloader valve has two modes of operation. Flow Actuated and Pressure Actuated are the two types. The unloader valve returns water through the bypass when the pressure washer nozzle does not supply it. The unloader valve prevents water waste in this way.

The unloader valve aids in increasing or decreasing the water pressure once more. It works to keep the nozzle’s additional pressure under control. Because of the worn-out unloader valve, the pressure washer loses pressure when trigger is pulled. Remove the unloader valve from the machine in this situation. Using a cleaner, remove the grime. In this scenario, a wire brush comes in handy. Install a replacement unloader valve for safety if it is broken or damaged in any manner.

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Examining the Piston

Maintaining water flow is dependent on the unloader disc/piston. If the unloader disc/freedom piston’s of movement is violated, it will not function. Remove the plate/piston from the unloader with a screwdriver or wrench if there is a problem. Using the appropriate material, remove dirt from the disc/piston. Replace the piston if it does not work properly after cleaning.

Setting the Pressure Washer Valve Correctly

The precise configuration of the unloader valve is crucial for water control. When the unloader valve is set at high pressure, the motor stalls, resulting in low water pressure in the washer. As a result, when setting the valve, make sure you follow the exact directions. If necessary, seek the assistance of a knowledgeable individual.

Inspection of Clogged and Faulty O-Rings

The oil supply is inadequate due to the deterioration of the O-ring which results in that loss of pressure in the pressure washer while pulling the trigger. The machine will not function normally if the O-ring fails to deliver oil appropriately. In this case, replacing the O-ring with a new one would be more important. Low pressure can also be caused by these factors, in addition to a blocked O-Ring.

  • The coupler for the outlet: Remove the outlet coupler by unscrewing it; a little spring and plunger will drop out. Check for an O-ring around the plunger; if there isn’t one, it’s most likely stuck in your outlet coupler. Remove the old O-ring from your outlet coupler and replace it with a new one from the hardware store.
  • The pressure washer wand: The pressure washer wand’s O-ring can rust or become damaged in a pressure washer spray cannon. Your flow rate issues could be solved by replacing the o-ring in your wand.

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Slipping of the Belt

Belt slippage is another typical reason of low water pressure. If you have a pressure washer with a belt drive, the belt may have come loose or need to be replaced entirely. Try tightening the pressure washing belt first; if that doesn’t work, you’ll need to visit a hardware store or contact a pressure washing expert to have a new belt put.

Troubleshooting a Pressure Gun

If the pressure cannon linked to the unloader leaks or is damaged, regular work is disrupted. The water spreads out when the pressure gun leaks. Due to the leaky pressure gun, the pressure washer loses pressure when trigger is pulled. With the necessary material, seal the leak. However, it is preferable to change.

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Valve on a pressure washer that has been damaged

Different sorts of valves can be found on a pressure washing machine. Each valve is different in terms of size and function. Inlet and discharge valves are notable examples. The water inlet is protected from outside dust and filth by the inlet valve, which is situated in front of it. The discharge valve, on the other hand, keeps the discharge region clear of trash so that everything runs smoothly. The activity of the washer is affected if either of these pair valves is broken. The machine’s working capacity is depleted.

If the inlet valve is damaged, the water flow is reduced. As a result, the washer does not receive appropriate water and electricity, resulting in low water pressure in the washer. The plunger, interestingly, leaks water towards the discharge valve when the inlet valve fails. The water is then discharged through the discharge valve. Remove the two valves from the machine and inspect them for debris. With a smooth cloth and some oil, clean the two valves. Please take care not to break any of them when cleaning. Check for a broken valve spring which could possibly the reason of pressure washer loses pressure when trigger is pulled.

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Insufficient Water Supply Solution

One of the reasons why the pressure washer loses pressure when you pull the trigger is due to a lack of water supply. Make sure the pump has enough water before removing the trigger. Even when there is adequate water in the pump, the washer frequently does not receive the desired amount of water.

To keep water flow at the optimum level, there must be a balance between PSI and GPM. The PSI and GPM levels for each machine are mentioned separately in the instructions. Make the necessary adjustments to the classes in accordance with the instructions.

Problems With Water Flow Rates And How To Fix Them

Another issue, in addition to pressure guns, nozzles, and unloader issues, is the low water flow rate. As a result of the dirt accumulation in the water flow channel, the water flow rate decreases. To figure out what’s wrong, turn on the water pump. Even though there is enough water, if the water flow rate drops, it is a sign that the water flow path is unclean. Using a cleaner, clean the water flow path.

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Performing a High-Pressure Hose Inspection

Even with a high-pressure hose in the machine, an improper high hose can cause the machine to halt. The high-pressure hose does not perform any direct work for the machine, but it does make the job easier by increasing pressure in the washer. As a result, utilize the highest hose that is compatible with the equipment.

Remove the dirt from the high hose if it is clogged or twisted. Replace it with a new one if it twists or bends. Remove and clean the high-pressure hose from the washer.

The Plunger’s Quality

The user frequently overlooks or ignores certain devices. The user is completely unconcerned with the plunger’s quality. Overall, it has an impact on the washer. The plunger deteriorates over time. Replace the old plunger with a suitable plunger for the machine purchased from the market. If you can’t find the plunger you’re looking for, contact the manufacturer.

Troubleshooting for Air Release

The air getting stuck in the pump is the more visible problem in the pressure washing machine while pulling the trigger. The trapped air heats the pump gradually. The pump is unable to appropriately supply water in this condition. Turn off the motor first, then remove the hoses behind the pump to exhale the air.

Reconnect the garden hose. Turn on the pump and let it running for 5 to 6 minutes. Now put the other one on and start the engine before cleaning as usual.

Water Inlet Filter Inspection

The pressure washer loses pressure when trigger is pulled sometimes because the water inlet filter becomes clogged. Every 4-5 usage periods, the user must remove and clean the filter. Filters that are clogged prevent water from flowing normally and lower water pressure in the washer. Because the filter is brittle, handle it with care when removing it from the washer. Rub the dirt away with a soft, scaly brush. Please replace the filter if it is cracked or damaged for any other reason.

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Using Fuel Instructions

When utilizing fuel, always be cautious. Older fuels degrade over time, causing the energy to become thicker and thicker due to evaporation. Remove any petrol that has been in the tank for more than a month and replace it with new fuel. Step by step, old electricity will cause problems. The washer will not be able to generate enough pressure as a result of this. If you want to acquire the desired water flow, always use clean fuel.

It’s a fallacy to believe that old fuel is the only issue with pressure washers. New gasoline can occasionally cause issues. It’s possible that the inquiry is, “How?” You put clean gas in the tank, but your fuel filter was clogged with dirt. As a result, all of the dirt in the filter combined with the fuel contaminates it. Before adding the fuel, ensure sure the filter is clean. Also, make sure the fuel cap is securely fastened.

Here is the Practical DIY Demonstration of what to do if your pressure washer loses pressure when the trigger is pulled:

Final Wrap

What can be the possible reasons of why pressure washer loses pressure when trigger is pulled? This has been thoroughly discussed. It is critical that you identify the root problem and take steps to address it. A worn nozzle is one of the most common sources of pressure loss, just as a clogged discharge valve is one of the most common reasons of this issue. Hopefully, the problem of pressure loss caused by your valued pressure washer’s trigger pool has now resolved. Of course, it is critical to maintain your laundry equipment in order to keep it working.

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