Navien tankless water heaters are efficient and convenient but sometimes have problems. Error codes often show these problems. You can quickly fix many of these problems by resetting the Navien tankless water heater. This guide will show you how to reset a Navien water heater step by step. This guide will help you keep getting hot water without any interruptions. But before you start, remember that safety is essential when doing this.

 Understanding the Reset Navien Tankless Water Heater Process

Before resetting your Navien tankless water heater, we must understand the concept behind this procedure.

What Is a Reset?

A reset is a process that restores your Navien tankless water heater to its default settings. It can help resolve minor issues, error codes, and glitches that may occur during the heater’s operation. You give your Navien unit a fresh start by performing a reset.

Locating the Reset Button

The reset button is your key to resolving these issues. Typically, you can find this button in the bottom right corner of the heater, and locating it is the first step in the reset process.

Step-by-Step Instructions on How to Reset Navien Tankless Water Heater

Now that you understand the reset process, let’s break it down into three easy-to-follow steps.

 Step 1: Turning Off the Power

Safety for both yourself and your equipment is necessary. Before resetting your Navien tankless water heater, ensure that you turn off the power to the unit. This precaution is crucial if you’ve experienced a power outage. The safest way to proceed is by unplugging the heater from the power outlet.

Step 2: Locating and Pressing the Reset Button

With the power now turned off, find the reset button on your Navien tankless water heater. As mentioned earlier, you can typically locate it in the bottom right corner of the unit. Once you’ve found the reset button, press it to initiate the reset process. After pressing the button, be patient and give the unit time to complete the reset.

 Step 3: Adjusting Temperature and Checking for Power

Once you have reset your Navien tankless water heater, you can plug it back into the power outlet and turn it on. Then, use the control panel to set the temperature to the desired level. In most cases, you can achieve temperatures as high as 120 degrees Fahrenheit.

Checking for Error Codes

If the error code that made you reset your Navien unit doesn’t go away, check to ensure the unit has power. Sometimes, the problem is not with the unit but with the electrical wiring. Ensure you turn on the circuit breakers.

 Troubleshooting: What If Resetting Doesn’t Work?

Resetting can fix many problems, but there may be better solutions. If you have tried resetting and the issues are still happening, you must try other things.

Contacting Navien Customer Support

Navien offers customer support services to assist you in diagnosing and resolving issues with your tankless water heater. Don’t hesitate to reach out to them at 1-800-519-8794 for professional assistance. They can guide you through further troubleshooting steps or arrange a service technician to help.

Common Reasons Behind Reset Button Failure

Sometimes, the reset button may not work as expected, and understanding why can be crucial in addressing the issue effectively.

1. Wiring Damage

Wiring interconnects the various components inside a tankless heater. If these wires are damaged or not connected properly, the reset button won’t work.

2. Overheating

Tankless water heaters have safety features to stop the water from boiling. If the water gets too hot, a circuit breaker will trip, and turning off the water heater can cause the reset button not to work.

3. Wrong Settings (Information Mode)

In addition to resetting the unit, the reset button in your Navien heater also exits the information mode. This mode provides critical information about your heater, such as flow rate and water temperatures. If you find yourself in this mode and the reset button doesn’t work, don’t worry; it’s not a sign of a malfunctioning heater.

How to Address Common Navien Error Codes

Resetting may not always resolve all issues. This section will outline the five most common Navien error codes and provide practical solutions for each.

1. Error Code E003

This code signifies an ignition failure. To resolve it, ensure the main gas supply valve is fully open and check if the ignitor is creating a spark. If not, it may need replacement.

2. Error Code E004

Error code E004 indicates that the heater has detected a false flame. In most cases, the issue lies in the central electrical cord not being grounded properly. Fixing the grounding issue resolves this error.

3. Error Code E012

Error code E012 means your heater has lost its flame. To fix this, check the air intake filter and clean it if it’s dirty. Also, make sure the electrical cord is properly grounded.

4. Error Code E016

This code suggests an overheating issue with the heat exchanger in your heater. The most common solution is to flush the heat exchanger and clean the filter to ensure proper water circulation.

5. Error Code E030

Error code E030 indicates an overheating exhaust. As a safety mechanism, the heater shuts down when it exceeds a specific temperature. To resolve this, turn off the heater for at least 30 minutes and restart it. Clean the cold water inlet filter to remove debris, and flush the heat exchanger.

Frequently Asked Questions About Reset Navien Tankless Water Heater

This section will address some common questions related to Navien tankless water heaters and the resetting process.

Do all tankless water heaters have reset buttons?

Yes, but the location of the reset button can vary depending on the manufacturer and model of the tankless water heater.

Does the Navien tankless water heater have another function for the reset button?

Yes, apart from resetting the unit, the reset button on your Navien heater is also meant to exit the information mode. This mode gives you essential details about how your heater is doing.

How do I clear error codes on Navien tankless water heaters?

To clear error codes, First, you must fix the root cause that triggered the error code.Once you resolve the problem, you may need to restart the heater to clear the error code from the control panel.

At what frequency should I perform maintenance on my Navien tankless water heater?

Giving your Navien tankless heater a checkup at least once yearly is a good idea to ensure it works its best. Also, remember to clean the filters before winter starts to keep them running efficiently.


As we conclude this guide, Keep in mind that having the skill to reset your Navien tankless water heater is valuable and can help you save time and money on service calls. We’ve provided comprehensive coverage of everything you need, from understanding the reset process to troubleshooting common issues and error codes and addressing your frequently asked questions about resetting Navien water heaters. Your journey to a hassle-free hot water supply, the ability to reset Navien water heaters, begins here!

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