Why Is My Navien Water Heater Making A Noise?

A navien water heater may make noise due to issues with the gas burner or water flow, necessitating professional troubleshooting and repair. If your navien water heater is making a noise, it is important to identify and address the underlying cause promptly to prevent further damage or inefficiency.

This article will discuss common causes of noise in navien water heaters and offer possible solutions to resolve the issue. By understanding the potential reasons behind the noise and implementing appropriate remedies, you can ensure the optimal performance and longevity of your navien water heater.

Why Is My Navien Water Heater Making A Noise?

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Understanding Common Noises From Navien Water Heaters

Is your navien water heater making strange noises? Don’t worry, you’re not alone. Understanding the different types of noises your navien water heater may produce can help you diagnose and address potential issues before they become larger problems. In this section, we’ll explore three common noises and what they may indicate.

Banging Or Hammering Sound

  • Loose pipes: Check for loose pipes that may be vibrating against the wall or floor. Tighten or secure the pipes to eliminate the noise.
  • Water hammer: When water flow is suddenly stopped or redirected, it can cause a banging sound. Installing a water hammer arrestor can help reduce this noise.
  • Sediment buildup: Sediment accumulation at the bottom of the tank can cause water to boil and create banging noises. Flushing the water heater annually can help prevent sediment buildup.

Whistling Or Whining Noise

  • Water flow restriction: A whistling or whining noise may be due to restricted water flow. Check the water inlet valve and make sure it is fully open.
  • Venting issues: Improper venting can cause a whistling noise. Ensure that the vents are clear from any obstruction and properly installed.
  • Heat exchanger problems: A damaged heat exchanger can also result in whistling or whining noise. If you suspect this to be the case, it’s best to contact a professional plumber for inspection and repair.

Gurgling Or Popping Noise

  • Air in the system: Gurgling or popping noises may indicate air in the pipes or water heater. Bleed the air from the system by opening the air vents until water flows consistently.
  • Scaling or mineral buildup: Mineral deposits or scaling inside the water heater can create gurgling or popping sounds. Regular maintenance, such as descaling, can help prevent this issue.
  • Backflow: If the water heater is connected to a closed system, a gurgling noise may occur due to backflow. Install a pressure relief valve to eliminate this noise.
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Remember, if you’re unsure about any noises coming from your navien water heater, it’s always best to consult a professional plumber or contact navien’s customer service. Addressing these noises promptly can help maintain the efficiency and longevity of your water heater.

Troubleshooting Noises In Your Navien Water Heater

Is your navien water heater making strange noises? Don’t fret! While it can be concerning, there are several common culprits behind these noises that can easily be resolved. In this section, we will walk you through the troubleshooting steps to identify and fix the issue.

Check For Loose Or Broken Components

If your navien water heater is making noises, the first thing you should do is inspect for any loose or broken components. Here are some key points to consider:

  • Check the access panels and ensure they are properly secured.
  • Tighten any loose screws, nuts, or bolts.
  • Inspect the fan blades for any damage.
  • Look for loose pipes or connections.

Inspect For Sediment Build-Up

Sediment build-up can cause your navien water heater to make noises. Follow these steps to check for sediment and deal with it accordingly:

  • Turn off the water heater and let it cool down completely.
  • Drain the tank to remove any sediment that may have accumulated.
  • If necessary, use a brush to gently scrub away any stubborn sediment.

Adjust Water Pressure

Excessive water pressure can lead to noise issues in your navien water heater. Here’s what you need to do:

  • Locate the pressure regulator, usually found near the main water supply line.
  • Adjust the pressure regulator to ensure it’s set within the recommended range.
  • Consult your water heater manual for the ideal pressure range.

Flush The System

Flushing the system helps remove any trapped air or debris, reducing noise levels. Follow these steps to flush your navien water heater:

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  • First, turn off the power supply to the water heater.
  • Locate the drain valve and attach a hose to it.
  • Open the valve to allow the water to drain out.
  • Once the water has drained completely, close the valve.
  • Turn on the power supply and allow the water heater to refill.

By following these troubleshooting steps, you can identify and resolve the noise issues in your navien water heater. Remember to always consult your water heater manual or seek professional assistance if needed.

Calling A Professional To Address Navien Water Heater Noises

Is your navien water heater making a noise that is causing concern? While it’s natural for water heaters to produce some level of sound during operation, certain noises can indicate underlying issues that require professional attention. In this section, we will discuss the importance of regular maintenance, the benefits of hiring a qualified technician, and signs of a serious issue that should not be ignored.

Importance Of Regular Maintenance

Regular maintenance is crucial for ensuring the smooth and efficient operation of your navien water heater. By scheduling routine maintenance checks, you can:

  • Extend the lifespan of your water heater
  • Minimize the risk of unexpected breakdowns
  • Improve energy efficiency, leading to lower utility bills
  • Identify and address minor issues before they escalate into major problems

Hiring A Qualified Technician

When it comes to addressing navien water heater noises, it is recommended to hire a qualified technician rather than attempting diy repairs. Here’s why:

  • Technical expertise: A certified technician possesses the necessary knowledge and experience to accurately diagnose and resolve water heater issues.
  • Safety considerations: Dealing with gas-powered water heaters can be dangerous without proper training. A professional technician will follow safety protocols to ensure a secure working environment.
  • Warranty protection: Attempting repairs on your own may void the warranty of your navien water heater. Hiring a professional ensures that any necessary repairs are done in compliance with the manufacturer’s guidelines, preserving your warranty coverage.

Signs Of A Serious Issue

While some water heater noises are relatively harmless, others can indicate a more serious underlying problem. If you notice any of the following signs, it is crucial to seek professional assistance promptly:

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  • Loud banging or knocking sounds: This could indicate a problem with the heating element or a buildup of sediment in the tank.
  • High-pitched whistling or hissing noises: These sounds may be caused by a faulty pressure relief valve or a buildup of pressure inside the tank.
  • Rumbling or gurgling sounds: This could be a result of sediment accumulation, which can lead to reduced efficiency and potential damage to the water heater.
  • Dripping or leaking sounds: Leaks should never be ignored, as they can indicate a malfunctioning valve or a crack in the tank. Immediate attention is necessary to prevent water damage.

By paying attention to these signs and promptly seeking professional help, you can avoid further damage to your navien water heater and ensure a continuous supply of hot water for your household.

Remember, when it comes to fixing navien water heater noises, it’s best to leave it to the experts. Regular maintenance, hiring a qualified technician, and addressing any signs of a serious issue are key to maintaining the optimal performance of your water heater.

Don’t hesitate to reach out to a professional for assistance when needed.


Overall, if you’ve noticed a noise coming from your navien water heater, it’s essential not to ignore it. The noise could be a sign of an underlying issue that requires attention. While some noises may be normal, others can indicate a problem that needs professional intervention.

By understanding the various reasons why your navien water heater may be making a noise, you can take the necessary steps to address and resolve the issue. Regular maintenance, such as flushing the system and checking for loose fittings, can help prevent noise problems.

Ensuring proper installation and following manufacturer guidelines can also minimize the risk of noise disturbances. Remember, a well-maintained and properly functioning water heater not only provides hot water but also contributes to a quiet and comfortable home environment. Stay proactive and attentive to keep your navien water heater operating smoothly and quietly.


I am a mechanical engineer and love doing research on different home and outdoor heating options. When I am not working, I love spending time with my family and friends. I also enjoy blogging about my findings and helping others to find the best heating options for their needs.