Why Does My Pressure Washer Keep Cutting Out?




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If you’ve recently started your pressure washing journey or are a seasoned professional in need of expert advice, you may have encountered a frustrating problem: your pressure washer cutting out unexpectedly. At PressureWasherWisdom.com, we understand the importance of uninterrupted performance and have created a comprehensive guide to help you tackle this issue. With our product reviews, gift guides, and Q&A sections, you’ll find everything you need to keep your pressure washer running smoothly. Say goodbye to interruptions and hello to a seamless cleaning journey with PressureWasherWisdom.com.

Why Does My Pressure Washer Keep Cutting Out? A Comprehensive Guide to Common Causes and Solutions

Pressure washers are powerful tools that can make cleaning tasks easier and more efficient. However, if your pressure washer keeps cutting out, it can be frustrating and hinder your cleaning progress. In this article, we will explore the common causes for pressure washer cutting out and provide comprehensive solutions to help you troubleshoot and resolve the issue.

Low Water Supply

One of the most common causes for a pressure washer to cut out is a low water supply. Insufficient water flow can disrupt the pressure washer’s operation and cause it to shut off. To check if low water supply is the culprit, there are a few steps you can take.

First, check the water inlet filter. Over time, debris and sediment can clog the filter, restricting water flow. Clean or replace the filter if necessary. Additionally, verify the water source pressure. If the pressure is too low, it may not provide enough water for the pressure washer to function properly. Finally, inspect the hose for kinks or blockages that may impede water flow. Repair or replace any damaged hoses to ensure an uninterrupted water supply.

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Clogged Nozzle

Another common cause for a pressure washer cutting out is a clogged nozzle. Over time, dirt, debris, and mineral deposits can accumulate in the nozzle, obstructing the water flow and causing the pressure washer to shut off. To address this issue, follow these steps.

First, remove the nozzle and clean it thoroughly. Use a small brush or a pin to remove any stubborn blockages. If the nozzle is severely clogged, it may be necessary to replace it with a new one. Additionally, consider using cleaning solvents specifically designed for removing mineral deposits to improve the performance of your pressure washer.

Air Leakage

Air leakage in the pressure washer system can also lead to frequent shutdowns. Inspect the hoses, connections, and seals for any signs of damage or looseness. Tighten or replace loose seals to prevent air from entering the system. If you identify damaged hoses, it is essential to repair or replace them to maintain proper pressure and prevent air leakage. Using thread sealant or Teflon tape when connecting components can ensure tighter connections and minimize air leakage.

Fuel Issues

If your pressure washer is powered by a gas engine, fuel issues can contribute to the cutting out problem. Perform the following steps to troubleshoot fuel-related issues.

First, check the fuel level and quality. Ensure that the fuel tank is adequately filled and that the fuel is not stale or contaminated. If the fuel is old, drain and replace it with fresh fuel. Additionally, inspect and clean the fuel filter. Over time, the fuel filter may become clogged, impeding fuel flow. Remove any debris or sediment from the filter, or replace it if necessary. It is also important to inspect and adjust the carburetor to ensure that the fuel-air mixture is optimal for the engine’s performance. Finally, always use the recommended fuel and additives as specified by the manufacturer to avoid potential problems.

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Spark Plug Problems

A faulty spark plug can also cause a pressure washer to cut out. Inspect the spark plug for fouling or damage. If the spark plug is dirty or worn out, clean or replace it with a new one. Additionally, ensure that the spark plug gap is correct according to the manufacturer’s specifications. An incorrect gap can affect the spark plug’s performance and lead to power disruptions. It is also advisable to inspect the ignition system for any issues that may interfere with proper spark generation.

Faulty Trigger Gun

The trigger gun, which controls the water flow, can be another culprit behind the cutting out problem. Inspect the trigger gun for any damage or malfunction. If you identify any issues, such as leaks or sticking parts, repair or replace the trigger gun accordingly. It is crucial to ensure proper assembly of the trigger gun components to maintain uninterrupted water flow and avoid unnecessary shutdowns.


Overheating is a common issue that can cause a pressure washer to cut out. Several factors can contribute to overheating, including low oil levels, a dirty or clogged air filter, excessive engine speed, and insufficient cooling time. To prevent overheating, follow these steps.

First, check the oil level and quality. Low oil levels can hinder proper engine lubrication and cooling. Add or replace the oil as needed, following the manufacturer’s recommendations. Additionally, clean or replace the air filter regularly. A dirty or clogged air filter restricts airflow, leading to engine overheating. Monitor the engine speed, ensuring that it does not exceed the recommended RPM. Finally, allow the pressure washer to cool down adequately between uses, especially during prolonged periods of operation.

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Unbalanced Load

If you are using your pressure washer for heavy-duty tasks, an unbalanced load can cause it to cut out. Improper weight distribution can strain the pump and overload the motor, leading to shutdowns. To balance the load properly, follow these guidelines.

Distribute the weight evenly between the front and rear of the pressure washer. Ensure that the load is adequately supported and does not exceed the maximum weight capacity specified by the manufacturer. Avoid placing excessive weight on one side, as it can create imbalance and strain the components. Properly balancing the load will prevent unnecessary shutdowns and prolong the lifespan of your pressure washer.

Worn Pump

A worn or damaged pump can cause frequent shutdowns in a pressure washer. Inspect the pump for any signs of wear or damage, such as leaks or unusual noises. If you notice any issues, it may be necessary to replace the pump. A worn pump can lead to decreased performance and an unstable water flow, resulting in frequent shutdowns. Regular maintenance and proper care can help prevent pump wear and extend its longevity.

Electrical Problems

Electrical problems can also contribute to a pressure washer cutting out. To troubleshoot electrical issues, take the following steps.

First, check the power source. Ensure that the pressure washer is properly connected to a reliable power outlet or extension cord. Test the electrical connections for any signs of damage or looseness. In case of any issues, repair or replace the faulty wiring or connectors. It is advisable to consult a professional for complex electrical problems to ensure safety and proper resolution.


If your pressure washer keeps cutting out, it can be frustrating and impede your cleaning progress. By identifying the common causes and following the comprehensive solutions provided in this guide, you can troubleshoot and resolve the issue effectively. Regular maintenance, proper care, and adherence to manufacturer’s guidelines will enhance the performance and longevity of your pressure washer, allowing you to complete your cleaning tasks efficiently and hassle-free. Happy pressure washing!

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