Why is My Navien Water Heater Not Working? Troubleshoot Now!

Your navien water heater may not be working due to issues with the electrical power, gas supply, or venting. To fix the problem, you may need to reset the heater, check the gas valves, or clear any blockages in the venting system.

When your water heater stops working, it can be frustrating and inconvenient. Navien is a popular brand of water heater that offers energy-efficient and cost-effective solutions for home water heating. However, even the best water heaters can run into problems from time to time.

In this article, we’ll discuss some common reasons why your navien water heater may not be working and what steps you can take to get it back up and running. Whether you’re dealing with a lack of hot water, strange noises, or other issues, we’ll help you troubleshoot the problem so you can enjoy reliable hot water once again.

Why is My Navien Water Heater Not Working? Troubleshoot Now!

Credit: ggrhomeinspections.com

Possible Causes Of Navien Water Heater Not Working

If you’re experiencing trouble with your navien water heater, it could be due to several reasons. Whether its lack of power supply, gas supply issues, or water supply issues, understanding the potential causes and how to resolve them can help you get your water heater up and running again.

Lack Of Power Supply

A lack of a proper power supply can cause your navien water heater to malfunction. Some of the reasons behind it include:

  • The circuit breaker has tripped or there is a blown fuse.
  • The electrical switch or wiring have failed.
  • The heater’s control board or motor isn’t working correctly.

To address these issues, you must check and reset the circuit breaker or replace the blown fuse. If that doesn’t work, you may need to replace a faulty switch, wiring or control board.

Gas Supply Issues

Inadequate gas supply is another common reason for navien water heater malfunctioning. Some of the reasons behind it include:

  • Supply lines may be clogged by debris or mineral buildup.
  • The gas valve may be damaged or closed.
  • The pilot light may not be lit.

To address these issues, you can clean or replace clogged gas supply lines, open a closed gas valve or replace a broken one and make sure the pilot light is lit.

Water Supply Issues

Water flow issues are another reason for navien water heater malfunctioning. Some of the possible reasons behind it include:

  • Clogging or blocking of water filters and lines.
  • Water pressure isn’t sufficient.
  • The water flow sensor or piping has failed.

To address these issues, you can clean or replace clogged filters or lines, increase water pressure, replace a failed flow sensor and check for leaks or obstructions in the water piping.

Knowing the potential causes of your navien water heater malfunctions and how to fix them can save you time and stress. If the above tips don’t help, always consult with a professional plumber.

Identifying The Issue With Navien Water Heater

Navien water heater is an appliance that can save space at home, provide an adequate hot water supply without a tank, and reduce energy consumption. However, sometimes navien water heaters can stop working due to several reasons. We will explore how to identify issues with your navien water heater, common symptoms of malfunctioning navien water heaters, and ways to troubleshoot the problem without calling for professional help.

Symptoms Of A Malfunctioning Navien Water Heater:

  • No hot water is produced when you turn on the tap.
  • The water is not hot enough.
  • The water takes longer than usual to heat up.
  • The water heater makes strange noises.

Troubleshooting The Issue:

If you’re facing any of the above issues with your navien water heater, you might not have to rush to call for professional help. Here are some troubleshooting techniques that can help you fix the problem:

  • Check if the water heater is properly connected to the power supply.
  • Ensure that there is no obstruction or blockage in the water supply line.
  • Check if the gas valve is properly opened.
  • Clean the air filter.
  • Check if the flame rod is clean and not damaged.
  • If the above techniques don’t work, check the error code and consult the manual or call customer service to get help.

By applying these techniques, you can troubleshoot your navien water heater issues at home without hiring professional help, saving both time and money.

Identifying the issue with navien water heater is important before applying any troubleshooting techniques. By observing the symptoms of a malfunctioning navien water heater and applying suitable techniques, you can avoid the cost and hassle of calling for professional help.

Common Repair Solutions For Navien Water Heaters

Navien water heaters are a popular choice for homeowners due to their energy efficiency and high-performance capabilities. However, it can be frustrating when your water heater isn’t working correctly. In this blog post, we will explore some of the most common repair solutions for navien water heaters, including replacing the thermistor, flushing the water heater, cleaning the water filter, and adjusting water flow rate.

Replacing The Thermistor

One of the most common issues with navien water heaters is a faulty thermistor. The thermistor is a small sensor that measures the temperature of the water and communicates with the motherboard to ensure the heater is functioning correctly. If you think your thermistor is damaged, we recommend replacing it with a new one.

Here are some key points to bear in mind:

  • Turn off the gas supply and unplug the water heater before starting.
  • Locate the thermistor and gently remove it from the unit.
  • Carefully install the replacement thermistor and double-check all the wires are correctly connected.
  • Turn on the gas supply and plug the water heater back in.

Flushing The Water Heater

Another common solution to a navien water heater that is not working is to flush the system. A build-up of sediment and minerals can clog the system, resulting in poor performance and even damage to the unit. Here are some points to consider:

  • Turn off the gas supply and unplug the heater.
  • Attach a hose to the drain valve and run it to a floor drain or outside.
  • Open the drain valve and let the water run out for around 10-15 minutes.
  • Close the drain valve and remove the hose.
  • Turn on the water supply and allow the tank to fill up before turning the gas back on.

Cleaning The Water Filter

The water filter is another essential component that can become clogged with debris over time. A dirty filter can cause all sorts of issues, including lower water pressure and inconsistent heating. Here are some key points to consider before cleaning the filter:

  • Turn off the gas supply and unplug the water heater.
  • Locate the water filter and carefully remove it from the unit.
  • Rinse it thoroughly under running water to remove any debris or sediment.
  • Reinstall the filter and turn on the water supply and gas.

Adjusting Water Flow Rate

Finally, adjusting the water flow rate can improve the performance of your navien water heater. If the flow rate is too high or too low, it can cause problems with heating performance and water pressure. Here are some additional points to consider:

  • Turn off the gas supply and unplug the water heater.
  • Locate the flow rate adjustment valve and turn it until the desired flow rate is achieved.
  • Reconnect the gas supply and plug the unit back in.

By following these common repair solutions for navien water heaters, you can get your unit back up and running in no time. If you’re still experiencing issues after trying these solutions, it’s best to contact a professional. With proper maintenance and upkeep, your navien water heater should provide you with years of reliable hot water.

When To Seek Professional Help

Your navien water heater is an essential fixture in your home, providing hot water for showers, cleaning and much more. However, it can be frustrating when it suddenly stops working. Some issues may be easily fixed by yourself or with the help of a professional, while other complex problems may require more than a simple solution.

In this section, we will cover some of the situations where a professional is needed, how to identify complex issues, and tips for choosing a reputable navien water heater repair service.

Situations When Professional Help Is Necessary

While some water heater issues can be easily fixed, others require the knowledge and skills of a professional plumber. These situations include:

  • No hot water after following the manufacturer’s instructions
  • Water is too hot or too cold, and adjusting the temperature setting does not help
  • Leaks from the water heater that cannot be fixed with a simple repair
  • Unusual noises or smells coming from the water heater
  • Faulty or damaged electrical or gas connections
  • Incorrect installation of the water heater

Identifying Complex Issues That Require Professional Intervention

There are certain complex issues where you should seek professional help immediately to avoid any safety hazards. These include:

  • A gas leak or smell of gas near the water heater
  • Corrosion or rust surrounding the base of the water heater
  • Issues with the venting or flue pipes
  • Faulty pressure relief valve
  • A tripped circuit breaker or blown fuse

Tips On Choosing A Reputable Navien Water Heater Repair Service

Choosing the right navien water heater repair service can be challenging. Here are some tips to help you pick a reputable service:

  • Look for references and reviews from previous customers
  • Check if the service has the necessary licenses and a good reputation in the local community
  • Verify if the company has insurance in case of any damages during the repair work
  • Confirm if the repair technicians are certified, and have received appropriate training and experience in working with navien water heaters
  • Get a detailed estimate of the repair work, including all costs involved, before beginning any work

When your navien water heater has issues that you cannot diagnose or repair on your own, it’s time to seek professional help. Identifying complex issues that require professional intervention will prevent any further damage or hazards. By following the tips we provided for choosing a navien water heater repair service, you can ensure that your water heater will receive the best care possible from qualified professionals.

Frequently Asked Questions On Why Is My Navien Water Heater Not Working

Why Is My Navien Water Heater Not Working?

If your navien water heater is not working, check to see if there is power to the unit, if the unit is receiving gas, if the water pressure and flow are correct, if the system is free of blockages or leaks, or if there is an error code displaying on the control panel.

How Do I Reset My Navien Water Heater?

To reset your navien water heater, first turn it off and then on again. If the heater has an error code displayed, try resetting it by holding down the power button for five seconds. If the error code persists, consult with a professional technician.

How Do I Clean My Navien Water Heater?

To clean your navien water heater, turn off the power source and gas supply, remove the front panel, and use a soft brush to gently clean the combustion chamber, heat exchanger, and burner. Be sure to also clean the air filter and remove any accumulated debris or sediment from the water inlet filter.

How Often Should I Service My Navien Water Heater?

It is recommended that you service your navien water heater at least once a year to ensure optimal performance, energy efficiency, and longevity. Routine maintenance by a professional technician can also help to prevent breakdowns and costly repairs in the future.

What Causes A Navien Water Heater To Leak?

Some common causes of leaks in navien water heaters include a malfunctioning pressure relief valve, loose connections or damaged pipes, a faulty heat exchanger, or high water pressure. If you notice a leak in your navien water heater, it is recommended that you seek professional assistance to diagnose and repair the issue.


To summarize, your navien water heater not working is undoubtedly frustrating, but there can be numerous reasons behind it. The problem might be caused by a faulty thermostat, gas valve, or igniter. It might also be due to inadequate power supply, a dirty air intake, or blocked exhaust vent.

As a homeowner, you can spot some of these problems and troubleshoot them yourself without calling in professionals. Nonetheless, it’s always recommended to have a licensed plumber or navien technician look at your system if you are not sure of what you’re doing or you’re dealing with a severe issue.

Remember to maintain your navien water heater regularly to ensure prolong life, proper performance, and optimal energy efficiency. Hopefully, this guide has been helpful in diagnosing and fixing any problems you might encounter with your navien water heater, allowing you to enjoy on-demand hot water in your home.