A Noritz tankless water heater offers efficient and endless hot water, but occasionally, you may encounter issues that require a reset. Some of these issues can be resolved by resetting the unit, while others may require professional assistance. 

Resetting your Noritz tankless water heater is a simple and quick process that can restore its functionality and clear any error codes. However, before you reset your unit, you should identify the cause of the problem and try to fix it. Otherwise, the issue may recur and damage your unit. In this post, we’ll walk you through the process of resetting your Noritz tankless water heater, providing troubleshooting tips along the way.

Identify the Problem

Before diving into the reset process, it’s crucial to understand why you might need to reset your Noritz tankless water heater. Common situations that may necessitate a reset include a power outage, error codes, gas or water supply issues, or the unit failing to function as expected. 

The first step is to identify the problem that’s causing your Noritz tankless water heater to malfunction. You can do this by checking the error code displayed on the unit’s control panel or remote controller. The error code will indicate the type and severity of the problem as well as the possible causes and solutions. Error codes can indicate issues with ignition, combustion, sensors, or other components. By resolving the error code, you can restore the functionality of your water heater.

Some common error codes are:

  • 11: No ignition
  • 14: Thermal fuse
  • 16: Overheating
  • 29: Neutralizer drain
  • 90: Air intake or exhaust blockage

You can find the complete list of error codes and their meanings in your Noritz tankless water heater manual or on the Noritz website.

Prepare for the Reset

Before proceeding with the reset, make sure you have the necessary tools: a screwdriver and access to the power supply and water shutoff valves. Familiarize yourself with the location of these components, as they may vary based on your specific model. Additionally, consult the manufacturer’s manual or website for model-specific instructions, as some units might have unique reset procedures.

Turn Off the Power Button

The first step to reset your Noritz tankless water heater is to turn off the power button and disconnect all gas connections. This will prevent a gas leak while you reset your unit.

To disconnect the gas connection, locate the gas valve on the gas line that connects to your unit and turn it off. You should also check for any gas leaks by using a soap solution or a gas detector.

Locate the Reset Button

The next step is to locate the reset button on your Noritz on-demand water heater. The reset button is usually located on the front or back panel of the unit, depending on the model. It may be covered by a small plastic cap that you need to remove.

The reset button is marked with a red circle and an R letter. It may also have a label that says “Reset” or “Push.” To access the reset button, you may need to remove the cover of your unit by unscrewing some screws or clips.

Press the Reset Button

Once you’ve located the reset button, press it firmly for a few seconds until you hear a click or a beep sound. This will reset your Noritz tankless water heater and clear any error codes.

You may need to press the reset button more than once if it doesn’t respond at first. You may also need to use a small tool such as a screwdriver or a pen to press the reset button if it’s hard to reach or stuck.

Restore Gas Connections

The final step is to restore gas connections to your Noritz tankless water heater. First, turn on the gas valve on the gas line that connects to your unit. Then check for any gas leaks again by using a soap solution or a gas detector.

Next, turn on the power button on the front panel of your unit. You should see some lights or indicators that show your unit is working normally. You can now test your Noritz tankless water heater by running hot water from a faucet or shower.

Troubleshoot Persistent Issues

If everything works fine, you’ve successfully reset your unit. If the reset process didn’t resolve the problem, additional troubleshooting steps might be necessary. Check the Noritz user manual or visit their official website for a comprehensive list of error codes and troubleshooting tips. It’s also a good idea to contact Noritz customer support or consult a professional technician who has experience with tankless water heaters if you encounter persistent issues.

Resetting your Noritz tankless water heater can be a straightforward process when approached systematically. By understanding the need for a reset, preparing adequately, and following the appropriate steps, you can troubleshoot common issues and get your Noritz tankless water heater back to providing the reliable hot water supply it’s known for.

Arnett’s Water Systems of San Diego is proud to offer professional installation, maintenance, and repair services for Noritz tankless water heater systems. When you’re ready to have a Noritz tankless water heater installed in your home, call on the experienced pros from Arnett’s Water Systems, the specialists in tankless water heater installation San Diego homeowners trust for high-quality water system products and exceptional service at a reasonable price. Call one of our friendly team members today at (619) 223-1209 to learn how a tankless water heater can be the perfect choice for you and your family.