How To Reset Noritz Tankless Water Heater

Tankless Water Heater

Noritz is one of the United States’ leading companies for water heaters. They manufacture many products related to heating, and their tankless water heaters are one of the best when it comes to performance and efficiency. 

However, nothing is perfect and sometimes your Noritz tankless water heater needs a little human intervention to get it working perfectly. 

You may notice that an error code has appeared on your Noritz tankless water heater’s controller screen. A two-digit number will appear and flash until the problem that occurred has been dealt with. 

The thing is, either once you’ve fixed the problem or you can’t seem to find one, the error signal might not go away. 

How do you fix this? 

You will need to reset your Noritz tankless water heater. 

If you are unsure how to do so then just follow this guide. That way, you will be able to get your Noritz tankless water heater up and running in no time. 

Why You Need To Reset Your Noritz Tankless Water Heater

Like we said earlier, sometimes when the problem with your water heater is fixed, the error code still persists.

This does not always mean that there is still an issue so you have to reset your water heater in order for the error code to go away and for the water heater to resume working as normal. If the issue is not fixed, then the error code will appear again.

Sometimes, you may get an error code for no reason. If you have checked the code from the control screen with the manual and tried to see if you can spot the problem too, sometimes you might find that the water heater is working perfectly and it was a false error.

This can be annoying but hey, nothing is perfect. 

To get rid of this false error, you will also have to reset your Noritz tankless water heater. If the error still persists, then it’s best to get a plumber out to check your water heater just to be safe. 

But it is very likely that at some point, you will need to reset your Noritz tankless water heater for the above reason. 

So, let’s show you how to do that.

Resetting Your Noritz Tankless Water Heater

If you need to reset your tankless water heater, then don’t worry – it’s super easy. 

Most Noritz tankless water heaters actually come with a reset button so all you have to do is find it and press it. It really is that easy! 

The big issue for a lot of people is finding the reset button. If you still have the instruction manual for your water heater, read it through to see if it tells you where it is. The thing is a lot of people usually end up throwing away or losing their water heater’s manual so let’s see if we can find it for you.

The reset button for most Noritz tankless water heaters can typically be found on the front panel. It is a little gray button with the image of four squares next to it with one square filled in black. This is your reset button – give it a press and the error signal should clear on the screen. 

Noritz Tankless Water Heater

 If The Error Persists

If you have tried resetting your Noritz tankless water heater but the error signal is still there, then there is most likely an actual error with your water heater.

Even if it appears to be working fine, you are better off calling in a technician to take a look at it just to be sure. If it could be, the water heater is reading an error that doesn’t affect the water heater on its own but will eventually cause further damage. A technician will be able to fix the issue.

Do not try to fix the issue yourself. Unless you are a qualified technician, you could end up causing more damage to your water heater than you will be fixing. Messing with water heaters like this one from Noritz can lead to far more serious issues. 

Keep yourself and your home safe by calling in a professional. 

The error signal could also be an error with the reader itself or perhaps a faulty control panel. The technician should also be able to fix this or recommend you to someone else who can. Again, do not try to fix the problem yourself – call in a professional. 

Common Errors 

If you have tried resetting your Noritz tankless water heater and the error code still persists, then you need to check what the error is. This will help both you and your technician when it comes to the next step. There are many error codes but the most common are the following:

Noritz Error Code 11 – Your water heater is not igniting properly. This could be due to not enough gas supply, insufficient air flow or the ignition plug needs cleaning of debris. You should contact a qualified technician to check your system.

Noritz Error Code 12 – A code 12 means there the unit has a weak flame. This could be due to a number of reasons.

Noritz Error Code 16 – A spike in outlet water temperature could result from scale buildup, which hinders heat transfer and makes the unit burn hot to compensate. 

Noritz Error Code 29 – Condensate drains are supposed to be connected to the drain pipe. This code means there is something wrong with the condensate drain. 

Noritz Error Code 73 – A code 73 error means there is something wrong with your heating system’s electrical power. You should unplug the heater and wait 30 seconds before plugging it back in. If this doesn’t work, you need to get a professional to fix it.

Noritz Error Code 90 – A code 90 means there is a problem with mixture of air and fuel within your heater. 

Some issues like Error Code 73 can be fixed by yourself but most of the time, you will need a professional heating technician to fix the problem. Don’t hesitate to call them. 


And that’s it!

All you need to do to reset your Noritz tankless water heater is to press the reset button on the front panel. It’s very easy to find and press but if the error code still persists, you probably do have an actual problem with your water heater. Call a technician so you can continue enjoying nice hot water. 

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