Pressure Washer Siphon Not Working [Cause & Proven Fixes]

There’s nothing more frustrating than having a pressure washer that doesn’t work properly. Whether you’re trying to clean your driveway, your deck, or your car, a broken pressure washer can be a major inconvenience.

If your pressure washer siphon isn’t working, it’s not the end of the world. With a little troubleshooting, you can usually fix the problem yourself. In this guide, I’ll walk you through the steps to troubleshoot a pressure washer siphon that’s not working. I’ll also provide tips on how to prevent this problem from happening in the future.

Most Common Reasons Of Pressure Washer Siphon Not Working

Most Common Reasons Of Pressure Washer Siphon Not Working

Blocked Inlet

The most common reason for a pressure washer siphon not working is a blocked inlet. This can be caused by debris, dirt, or other materials blocking the intake of the siphon. To fix this, you will need to remove the inlet hose from the pressure washer and clean it out. You may also need to remove the siphon assembly from the pressure washer and clean it out.

Defective Siphon Assembly

Another common reason for a pressure washer siphon not working is a defective siphon assembly. This can be caused by a broken or damaged diaphragm, a leak in the assembly, or a blockage in the hose. To fix this, you will need to replace the siphon assembly.

Incorrect Water Pressure

The water pressure in the pressure washer may also be too low for the siphon to work properly. This can be caused by a problem with the water supply, such as a low water pressure at the faucet or a kink in the hose. To fix this, you will need to check the water pressure at the faucet and make sure that there are no kinks in the hose.

Incorrect Water Temperature

The water temperature in the pressure washer may also be too high for the siphon to work properly. This can be caused by the water heater being set too high or by the water being too hot from the sun. To fix this, you will need to lower the water temperature at the water heater or let the water cool down before using it in the pressure washer.

Air in the Siphon

Air in the siphon can also prevent it from working properly. This can be caused by the siphon assembly not being properly installed or by air being introduced into the system when the pressure washer is turned on. To fix this, you will need to make sure that the siphon assembly is properly installed and that there is no air in the system.

How to Troubleshoot And Fix: pressure washer siphon not working

Symptoms of a Pressure Washer Siphon Not Working

There are a few telltale signs that your pressure washer siphon is not working properly. These include:

The pressure washer is not producing any or enough pressure.
The pressure washer is making a gurgling or sputtering sound.
The pressure washer is leaking water from the intake or outlet hose.
The pressure washer is not cleaning as well as it used to.

Causes of a Pressure Washer Siphon Not Working

There are a number of things that can cause a pressure washer siphon to stop working. These include:

A clogged intake filter:
The intake filter is located at the end of the intake hose and prevents dirt and debris from entering the pressure washer. If the intake filter is clogged, it can restrict the flow of water to the pressure washer, causing the pressure to drop.

A kinked or damaged intake hose:
The intake hose is the hose that connects the pressure washer to the water source. If the intake hose is kinked or damaged, it can restrict the flow of water to the pressure washer, causing the pressure to drop.

A clogged or damaged pump:
The pump is the heart of the pressure washer and is responsible for generating the pressure. If the pump is clogged or damaged, it can’t generate enough pressure to power the spray nozzle.

A faulty pressure switch:
The pressure switch is a component of the pressure washer that controls the flow of water to the pump. If the pressure switch is faulty, it can cause the pressure washer to cycle on and off, or to not generate enough pressure.

How to Troubleshoot a Pressure Washer Siphon

If you suspect that your pressure washer siphon is not working properly, you can troubleshoot the problem by following these steps:

1. Check the intake filter:
The first thing you should do is check the intake filter to make sure it is not clogged. To do this, remove the filter from the pressure washer and rinse it under warm water. If the filter is clogged, clean it with a soft brush and replace it.

2. Check the intake hose:
Next, you should check the intake hose to make sure it is not kinked or damaged. If the hose is kinked or damaged, replace it.3. Check the pump:
If the intake filter and hose are clear of obstructions, the next step is to check the pump. To do this, turn on the pressure washer and listen for any unusual noises. If you hear a gurgling or sputtering sound, the pump may be clogged. To clear the clog, turn off the pressure washer and disconnect the intake hose from the pump. Then, use a garden hose to flush the pump with water until the water runs clear.

4. Check the pressure switch:
If the intake filter, hose, and pump are all clear of obstructions, the next step is to check the pressure switch. To do this, turn on the pressure washer and watch the pressure gauge. If the pressure gauge does not increase when you turn on the pressure washer, the pressure switch may be faulty. To test the pressure switch, disconnect the pressure hose from the pump and connect it to a garden hose. Then, turn on the pressure washer and watch the pressure gauge. If the pressure gauge increases when you turn on the pressure washer, the pressure switch is working properly.

How to Fix a Pressure Washer Siphon

Once you have identified the cause of the problem, you can fix the pressure washer siphon by following these steps:

1. To fix a clogged intake filter, remove the filter from the pressure washer and rinse it under warm water. If the filter is severely clogged, clean it with a soft brush and replace it.

2. To fix a kinked or damaged intake hose, replace the hose.3. To fix a clogged or damaged pump, clean the pump with a garden hose or replace the pump.

4. To fix a faulty pressure switch, replace the pressure switch.

Preventing Pressure Washer Siphon Problems

You can prevent pressure washer siphon problems by following these tips:

Keep the intake filter clean:
Clean the intake filter regularly to prevent it from becoming clogged.

Inspect the intake hose regularly:
Inspect the intake hose regularly for kinks or damage. If you find a kink or damage, replace the hose.

Carefully operate the pressure washer:
Do not operate the pressure washer at high pressure for extended periods of time. This can

FAQs: Pressure Washer Siphon Not Working

Why is my pressure washer siphon not working?

There are a few possible reasons why your pressure washer siphon might not be working. Here are some of the most common:

The siphon hose is clogged: This is the most common cause of a siphon not working. To fix this, you can try cleaning the hose with a wire brush or by running water through it.

The siphon hose is kinked: If the hose is kinked, it can prevent the water from flowing properly. To fix this, you can try straightening out the hose.

The siphon hose is too long: If the hose is too long, it can cause the water to lose pressure. To fix this, you can try shortening the hose.

The siphon hose is too short: If the hose is too short, it can cause the water to back up into the pump. To fix this, you can try lengthening the hose.

The pump is not working properly: If the pump is not working properly, it can cause the siphon to not work. To fix this, you can try cleaning the pump or replacing it.

How do I fix a clogged siphon hose?

To fix a clogged siphon hose, you can try the following:

1. Remove the hose from the pump and the spray gun.
2. Run water through the hose to flush out any debris.
3. Use a wire brush to clean the inside of the hose.
4. Reattach the hose to the pump and the spray gun.

How do I fix a kinked siphon hose?

To fix a kinked siphon hose, you can try the following:

1. Find the kink in the hose.
2. Gently straighten out the kink.
3. Reattach the hose to the pump and the spray gun.

How do I shorten a siphon hose?

To shorten a siphon hose, you can try the following:

1. Cut the hose to the desired length.
2. Strip the ends of the hose.
3. Apply a heat shrink sleeve to each end of the hose.
4. Clamp the heat shrink sleeves in place.

How do I lengthen a siphon hose?

To lengthen a siphon hose, you can try the following:

1. Attach a coupler to each end of the hose.
2. Connect the two hoses together.
3. Clamp the couplers in place.

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