How to Start a Cordless Pressure Washer

How to Start a Cordless Pressure Washer

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Today, we will learn how to start a cordless pressure washer . Many beginners need help operating it, but we have come here to give you every detail on how to use a pressure washer. 
Battery-operated pressure washers are perfect for outdoor cleaning, offering the flexibility to clean anywhere without the hassle of cords. Along with operational skills, users must know the settings for a harmless pressure wash.
We shall cover following points in this article:

  1. Working Mechanism of Pressure Washers
  2. How to start a pressure washer?
  3. Troubleshooting Common Issues
  4. Maintenance Tips
  5. Applications

Portable pressure washers are perfect for cars, patios, and more, with various pressure settings to tackle different jobs. Before we get into the nitty-gritty, please read our latest guides on operating and the benefits of car pressure washers!
Also Read Article: Best Cordless Pressure Washer 
You should have a pressure washer for your home. It's a vital cleaning tool that works great for stubborn dirt that has accumulated for days or months.

1. How does cordless pressure washer work?

A cordless pressure washer is ideal for cleaning cars, motorcycles, bicycles, and other items at home like furniture and garden tools. Its portability makes it perfect for outdoor use without the need for a power cord, making tasks like washing boats much more practical.
The cordless car wash high-pressure spray gun is a complete solution for various tasks, combining powerful and portable tools with a single primary device. The Cordless Pressure Washer is an excellent device for efficient cleaning and watering, whether at home, outdoors, or on the go!
The cordless pressure washer is equipped with a hose designed to draw water from any fresh source. Water is supplied under pressure, making it easy to remove even complex contaminants. There is also a detergent reservoir for more difficult tasks.
Discover fast, effective cleaning with a cordless pressure washer you can take anywhere. 

2. Pre-Start Checklist for Your Cordless Pressure Washer

Pre Start Checklist for Your Cordless Pressure Washer

What are some essential points to remember before operating a pressure washer? Below, you will find some a checklist which also ensures your safety.
Important Safety Equipment

  1. Goggles:   Protect your eyes from sudden debris during pressure wash!
  2. Gloves:     Protect your hands from any cleaning chemical agent.
  3. Ear defenders (if needed): If your pressure washer makes a lot of noise, it is recommended that you use an earpiece. 
  4. Shoes: Long boots can help you avoid slipping during the wash. Moreover, they keep your feet safe from dirty water.

Safety Features to Check on Your Cordless Pressure Washer:

  1. Hose: A loose connection is dangerous. Therefore, always check your hose for leakage, etc!
  2. Battery: Make sure your battery is fully charged. Otherwise, you may run out of battery before completing your job. 
  3. Pressure Check: Learn your washer's pressure settings. Using too much power can damage what you're trying to clean.
  4. Safety Switch: This is a very important feature for both newbies and professionals. You must check that the trigger lock and emergency shut-off switch are working perfectly. 

Battery Inspection and Preparation

Battery inspection is crucial. Begin by visually inspecting the battery for any signs of damage, such as cracks, marks, or rust. Even minor damage can affect the battery's performance significantly. Then, look at either the meter on the battery itself or your washer to show how much charge is left in it.

Charging the Battery
To avoid complications during cleaning, follow the battery charging instructions carefully. It is recommended to use a charger specifically designed for your pressure washer, as specified by the manufacturer. Secondly place it on a safe location which is well-ventilated. Protect it from too much heat and cold.

Tips for Maintenance and Storage

Tips for Pressure Washer Maintenance and storag

Let's not forget to mention some of the ways you can improve your battery life: 
Charging regularly: It is good practice to charge your battery regularly, regardless of how you use it. Consult the manufacturer's instructions for specific guidance regarding how frequently to charge a battery. This will help keep batteries in impeccable condition.
Proper storage: If batteries are stored for extended periods, they should be kept in a cool and dry place. They are gonna destroyed by extreme heat or cold. Moreover, partial charging, such as 50% capacity during storage, is recommended.
Cleaning contacts: Over time, corrosion might build up on battery contacts, reducing conductivity and making it difficult for the pressure washer to function properly. Ensure regular cleaning with a dry cloth to wipe the battery terminals.
Replace when necessary: With time and frequent consumption, batteries eventually lose their ability to hold charge. Get a new one if you feel quick consumption of fully charged batteries.

Water Supply Setup

You will connect your cordless pressure washer to a water source. Most models can be used with either a standard garden hose or a bucket of clean water. Read the manual for your pressure washer to learn how to connect it to any water source.
Your pressure washer requires a continuous stream of water at high pressure to work optimally. If you are using a garden hose, ensure it is fully stretched and has no twists or obstructions. Confirm whether your regional water pressure meets the minimum requirements set in your power washer's manual. 

Nozzle Selection and Attachment

Nozzle Color

Spray Angle




Toughest Cleaning Jobs: For professional use only - extremely powerful for the toughest cleaning jobs like removing stubborn dirt and caked-on grime. Use with extreme caution and only if you are experienced, especially for paint removal.



Powerful Cleaning: Heavy-duty cleaning, degreasing, removing mildew and algae.



General Cleaning: Washing vehicles, decks, patios, removing loose dirt and grime.



Rinsing and Light Cleaning: Rinsing soap, cleaning windows, delicate surfaces.


Wide Spray

Applying Detergent: Low-pressure application of soap or cleaning solution.

How to Securely Attach and Change Nozzles?

Always put safety gear first before replacing nozzles! Shut down the pressure washer completely, and then squeeze the trigger to remove any remaining pressure until the water stops flowing. To start with, secure the washer, then twist the current nozzle in a counterclockwise direction to detach it.  
After firmly pushing it into place, turn the new nozzle clockwise until it clicks or locks securely.  Finally, give it one more pull to ensure it is attached correctly. Remember, safety comes first. Never try testing your equipment on your body.

Recommended Pressure Washer: ONEVAN 3500W 200Bar Brushless Electric Car Washer
With the OneVan cordless pressure washer, car cleaning is at your fingertips.  A strong 3500W brushless motor generates 200 bar, sufficient for thorough cleaning.  There is no need for extension cords – It carries Makita 18V batteries to execute cleaning jobs for the maximum time. The compact design makes it lightweight and easy to maneuver.  Simultaneously, you can enjoy adjustable pressure settings, and a simple assembly process makes it user-friendly for beginners and experienced users.








Brushless Motor


3 (100 bar, 150 bar, 200 bar)


200 bar (2900 PSI)


Up to 10 meters

Water Flow

4.1L/min (1.08 GPM)


Extension Wand, 0° Nozzle, 6-in-1 Wand

Hose Length

5 meters

3. Step-by-Step Guide to Starting Your Cordless Pressure Washer

Step by Step Guide to Starting Your Cordless Pressure Washer

We are gonna walk you through the process of safely and effectively using your cordless pressure washer.

Step 1: Safety Checks and Gear
Safety first! Before you turn on the machine, take a moment to review the following:

  1. Gear Up: Wear goggles, gloves, and sturdy shoes for protection.
  2. Safety Features: Double-check that all safety locks and switches are functioning correctly.
  3. Clear the Area: Keep bystanders and pets safe from the work area.
Step 2: Connecting to a Water Source

Cordless pressure washers offer flexibility in water source connections. You can connect it with either a garden hose or a bucket of clean water. Refer to your owner's manual for specific instructions on connection:

  1. Garden Hose: Connect the hose to your pressure washer's inlet and ensure it's fully extended and kinks-free.
  2. Bucket:  Fill a bucket with fresh water and connect it according to the manufacturer's instructions.
Step 3: Priming the Pressure Washer

Priming removes the air from the system, helping to ensure that it runs smoothly. For detailed priming steps, refer to your manual; typically, these include starting up the pressure washer (without pulling the trigger) and letting water run through the hose.

Step 4: Powering On

Pay close attention to the cordless pressure washer manual book for better performance. It usually comprises a straightforward power button or switch.

Step 5: Adjusting Pressure Settings

Many pressure washers have different selectable pressures. Pick the right following your requirements.

  1. High Pressure: For tough jobs like removing paint.
  2. Medium Pressure: Ideal for general cleaning tasks.
  3. Low Pressure: Perfect for rinsing soap.
Step 6: Beginning Your Cleaning Project

Now you're ready to tackle those cleaning projects! Here are some best practices:

  1. Start with a Low Setting: Begin with a lower pressure setting and gradually increase.
  2. Maintain a Safe Distance: Keep the nozzle at an appropriate distance from the cleaning surface.
  3. Spray Techniques: Use a sweeping motion to avoid damaging surfaces.
  4. Safety Reminder: Never point the nozzle at yourself, others, or pets.

4. Troubleshooting Common Issues

1. Pressure washer won't start?

  1. Check the manufacturer’s user manual, but generally:
    1. Ensure safety features are engaged.
    2. Verify water source is on and connected.
    3. Confirm power button is activated.

If these steps don't resolve the issue, consult the user manual for further troubleshooting.

2. Low pressure?
  1. Check for clogged nozzles, hoses, or inlet filter.
  2. Ensure you're using the correct pressure setting.
  3. If water flow is weak, air in the system can be an issue. You should try priming again.

3. No water coming out?

  1. Check for clogged nozzles, hoses, or inlet filter.
  2. Check the water source is turned on.
  3. A new washer might need priming.

5. Maintenance Tips to Keep Your Cordless Pressure Washer Running

After every use, separate and soak the jet to remove hidden dirt. Keep the battery in prime condition—keep it at about 50% charge and store it inside during winter seasons. Any water should be drained from your washer before storage, and wiping it down. After that, locate a cool place free from moisture (preferably indoors). By following these simple maintenance steps, you can have your cordless pressure washer work like new for years!

6. Applications of Cordless Pressure Washers Beyond Cleaning

Did you think a cordless pressure washer only cleans decks? These battery-operated washers are essential for cleaning homes and cars.
Need to paint your deck or fence? Use the pressure washer to remove loose paint, mildew, and dirt. This will give you a smooth surface to hold the paint properly.
Do not underestimate its role in your garden. It can be used to clear walkways from dirt and debris. It also removes moss and algae from stones or pavers when carrying out landscaping projects, making them look rejuvenated.
Key Note: Always start with low pressure and try on a spare area first. Incorrect pressure will damage surfaces. Safety first! So wear goggles and gloves while using a power washer and keep distance.

7. Conclusion

Cordless pressure washers look simple and light, but they are multitaskers in home cleaning. Buying a pressure washer can solve maximum cleaning problems in your home or a commercial place. Furthermore, you are not required to hire expensive cleaning services. However, learning how to operate a pressure washer is critical.

8. FAQs

1: What is the proper way to start a pressure washer?
The first step in starting a pressure washer safely entails three key components: first, ensure that all trigger locks and emergency shutoff switches are functioning correctly as described in the manual.
Second, connect your water source (hose or bucket) to the pressure washer's inlet and fully open up the water supply. Lastly, switch your power button/switch according to your model-specific instructions with the water turned on.

2: Does a pressure washer have to have water running to it to start?
Absolutely yes. Without water flowing through the system, pump friction causes heating that can spoil the pump in the long run. Therefore, before turning on your pressure washer, ensure you've turned on your water supply.

3: Why is my power pressure washer not starting?
Test whether the battery is charged or not. Recharge it fully. Check your water source next – make sure that the tap is turned on all the way, the hose is properly connected to the washer, and there are no leaks. Additionally, you might have problems with a clogged filter on the hose connection, so please see your manual for instructions on cleaning or replacing it. Lastly, some pressure washers may have trigger locks or thermal overload protectors that won't let them start; consult your manual to identify and reset any engaged safety features.

4: How to turn water on a pressure washer?
Water flow is not typically controlled by a separate switch on most pressure washers. Instead, connect a hose to the washer and turn on the tap of the external water source. In most pressure washers, the water flow is initiated by opening the trigger on the wand once the washer is turned on.

5: Is it OK to start a pressure washer without water?
Do not operate a pressure washer without running water, as this may cause overheating and damage to the pump, potentially leading to operational failures and reduced lifespan of the equipment.

6: Why is no water coming out of my pressure washer?
Two major reasons can be a clogged nozzle or disconnected hose. See if there are any kinks in hoses or filters that are blocked or if there is a shutoff valve at the source of supply. Also, verify that there is enough pressure from the source of your water.

7: Why won't water come on my washer?
One reason you are not getting water is a clogged water inlet on the pressure washer. Check to see if there is a clog in the water filter or inlet opening that needs to be cleaned. Additionally, ensure that both ends of the hose are correctly fastened.

8: How does water get into a pressure washer pump?
The mechanism is simple. Pressure washers come with an inlet hose connected to your tap. When you turn them on, the pump fills up and creates pressure within the system.

9: How do you prime a pressure washer?
Some pressure washers need priming, especially when they are new or have not been used for some time. This means filling the pump with some liquid so as not to run out dry. In most cases, priming involves turning on the pressure washer with the trigger off. For a particular model, consult the user's guide, which provides detailed instructions about how exactly to pump accordingly.

10: Why is my pressure washer not drawing water?
Check whether there is enough pressure at your source of supply. Look for clogged filters or kinked hoses. Make sure the pump inlet valve is open. Your manual provides more troubleshooting steps.