How Do I Fix A Pressure Washer That’s Losing Pressure Intermittently?




How Do I Fix A Pressure Washer That's Losing Pressure Intermittently

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Table of Contents

How to Fix a Pressure Washer That’s Losing Pressure Intermittently

1. Check the Water Source

1.1. Ensure Proper Water Supply

The first step in troubleshooting a pressure washer that is losing pressure intermittently is to check the water source. Ensure that the water supply to the pressure washer is adequate. Check that the water source is turned on fully and that there are no restrictions or kinks in the hose.

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1.2. Check for Clogs or Blockages

Another potential cause of pressure loss in a pressure washer is clogs or blockages in the water inlet or hose. Inspect the water inlet screen for any debris that may be obstructing the flow of water. Clean or remove any clogs to restore optimal water flow.

1.3. Clean or Replace Water Filter

A dirty or clogged water filter can also be the culprit behind pressure loss in a pressure washer. Check the water filter and clean it if necessary. If the filter is damaged or heavily clogged, replace it with a new one.

2. Inspect the High-Pressure Hose

2.1. Look for Leaks or Damage

A damaged or leaking high-pressure hose can result in pressure loss in a pressure washer. Inspect the hose for any signs of leaks, cracks, or damage. If any issues are found, replace the hose to restore proper pressure.

2.2. Tighten Hose Connections

Loose hose connections can also cause pressure loss. Ensure that all hose connections are tightened securely. Use a wrench if necessary to tighten them properly.

2.3. Replace the Hose if Necessary

If the high-pressure hose is severely damaged or leaking, it may need to be replaced. Consider replacing the hose with a new one to ensure optimal pressure and performance.

3. Examine the Nozzle

3.1. Clean or Unclog the Nozzle

A clogged or dirty nozzle can lead to pressure loss in a pressure washer. Remove the nozzle and clean it thoroughly. Use a small wire or a pin to unclog any debris that may be blocking the nozzle. Rinse it with water to ensure all particles are removed before reinstalling.

3.2. Check for Damage or Misalignment

Inspect the nozzle for any signs of damage or misalignment. If the nozzle is bent, cracked, or damaged in any way, it may need to be replaced. A faulty nozzle can affect the pressure output of the pressure washer.

3.3. Use the Correct Nozzle for the Job

Using the correct nozzle for the specific task is important to maintain optimal pressure. Different nozzles produce different spray patterns and pressure levels. Refer to the pressure washer manual to determine the recommended nozzle for the job at hand.

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4. Check the Pressure Washer Pump

4.1. Inspect for Leaks or Damage

A pressure washer pump that is leaking or damaged can result in pressure loss. Inspect the pump for any signs of leaks or visible damage. If leaks are detected, they may need to be repaired or the pump may need to be replaced.

4.2. Clean or Replace the Pump Inlet Valve

A clogged or faulty pump inlet valve can also cause pressure loss. Clean the pump inlet valve to remove any debris or blockages. If the valve is damaged, consider replacing it with a new one.

4.3. Verify Proper Pump Oil Level

Check the pump’s oil level to ensure that it is within the recommended range. Low oil levels can lead to decreased pressure in the pressure washer. Refer to the pressure washer manual for guidance on checking and maintaining the correct oil level.

5. Inspect the Spray Gun

5.1. Check for Clogs or Blockages

Clogs or blockages in the spray gun can disrupt the flow of water and result in pressure loss. Check the spray gun for any debris or obstructions. Clean the spray gun thoroughly to remove any clogs.

5.2. Replace Faulty Trigger or Wand Assembly

If the spray gun trigger or wand assembly is malfunctioning or damaged, it may need to be replaced. A faulty spray gun can affect the pressure consistency of the pressure washer.

5.3. Ensure Proper Assembly and Connection

Make sure that the spray gun is properly assembled and connected to the pressure washer. Check for any loose connections and tighten them as necessary. Proper assembly and connection are crucial for maintaining optimal pressure.

6. Look for Air Leaks

6.1. Check all Connections for Loose Fittings

Air leaks in the pressure washer system can cause pressure loss. Inspect all connections, fittings, and seals for any signs of leaks. Tighten any loose fittings to eliminate air leaks.

6.2. Apply Sealant or Teflon Tape to Seal Leaks

If air leaks are detected in the connections or fittings, consider applying sealant or Teflon tape to create a tight seal. This can help prevent air from entering the system and maintain consistent pressure.

6.3. Test for Air Leaks with Soapy Water

To further test for air leaks, apply a solution of soapy water to the connections and fittings. If bubbles form, it indicates the presence of air leaks. Identify the source of the leaks and apply the appropriate sealant or replace faulty components.

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7. Verify the Water Inlet Pressure

7.1. Use a Pressure Gauge to Measure Inlet Pressure

Measuring the water inlet pressure can help identify any issues that may be causing pressure loss. Use a pressure gauge to measure the inlet pressure of the pressure washer. Compare the reading to the recommended range specified in the pressure washer manual.

7.2. Adjust the Inlet Pressure to Optimal Range

If the water inlet pressure falls outside the recommended range, it may need to be adjusted. Consult the pressure washer manual for instructions on how to adjust the inlet pressure. Proper adjustment can help maintain consistent pressure output.

7.3. Consult the Pressure Washer Manual for Specifics

Always refer to the pressure washer manual for specific instructions and guidelines related to water inlet pressure. The manual will provide valuable information and insights on how to maintain optimal pressure for your particular pressure washer model.

8. Clean or Replace the Unloader Valve

8.1. Remove and Clean the Unloader Valve

The unloader valve is an essential component that regulates the pressure within the pressure washer. If the unloader valve is clogged or dirty, it can result in pressure loss. Remove the unloader valve and clean it thoroughly to remove any debris or blockages.

8.2. Inspect for Damage or Corrosion

While cleaning the unloader valve, inspect it for any signs of damage or corrosion. If the valve is damaged or corroded, it may need to be replaced. A faulty unloader valve can impact the pressure performance of the pressure washer.

8.3. Replace the Unloader Valve if Necessary

If cleaning the unloader valve does not resolve the pressure loss issue, consider replacing it with a new one. A malfunctioning unloader valve can cause intermittent pressure loss and affect the overall functionality of the pressure washer.

9. Check for Pump Cavitation

9.1. Ensure Proper Water Supply and Filter

Pump cavitation occurs when the pressure washer is not receiving sufficient water flow. To prevent pump cavitation, ensure that the water supply is adequate and the water filter is clean and free from any obstructions.

9.2. Adjust the Pressure Regulator Valve

Adjusting the pressure regulator valve can help alleviate pump cavitation. Consult the pressure washer manual for instructions on how to adjust the pressure regulator valve. Proper adjustment can optimize water flow and minimize pressure loss.

9.3. Consult a Professional if Cavitation Persists

If pump cavitation issues persist despite following the troubleshooting steps, it may be necessary to consult a professional pressure washer technician. They can assess the situation and provide expert advice or perform any necessary repairs to resolve the pressure loss problem.

10. Seek Professional Assistance

10.1. Contact for Expert Advice

If you have exhausted all troubleshooting options and are still experiencing intermittent pressure loss with your pressure washer, consider contacting They offer expert advice and can provide guidance specific to your pressure washer model and issue.

10.2. Find a Certified Pressure Washer Technician

For more complex issues or if you prefer hands-on assistance, it is recommended to find a certified pressure washer technician. They have the knowledge, skills, and experience to diagnose and repair pressure washer problems effectively.

10.3. Consider Servicing or Repairing the Pressure Washer

If the pressure washer continues to experience pressure loss despite troubleshooting efforts, it may be necessary to consider servicing or repairing the unit. Consult with a professional technician or refer to the manufacturer’s guidelines for further assistance.

In conclusion, a pressure washer that is losing pressure intermittently can be frustrating to deal with. By following these troubleshooting steps and checking each component thoroughly, you can identify and resolve the underlying issues causing the pressure loss. Remember to consult the pressure washer manual for specific instructions and contact experts if needed. With proper maintenance and care, your pressure washer will continue to perform optimally and efficiently in your cleaning journey.

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