How to Fix Noritz Code 11

For over 15 years, we’ve been servicing tankless water heaters that display all sorts of error codes. From codes caused by blockages in the exhaust venting to dirty aerators on an interior fixture tripping the tankless water heater, we’re hardly surprised by anything we come across in the field. Noritz code 11 is no different.

In this article, we’ll cover what Noritz error code 11 means and how you can go about fixing it. Spoiler alert: you’re going to need to call a professional.

What Does Noritz Error Code 11 Mean?

Noritz error code 11 means that your tankless water heater is experiencing ignition failure. A blockage, a bad igniter or ignition rods, or the igniter box can trigger this error code.

Since there are plenty of possible causes, the best thing to do is call a professional. Taking the DIY hero approach can lead to a voided warranty and also opens you up to danger.

So, How Do I Fix Noritz Error Code 11?

The best and the only course of action is to call out a technician to your home. From here, there are a couple of options depending on what your technician discovers during their inspection of the tankless water heater and your plumbing system.

One likely cause for the error code is the ignition rods. These components can corrode over time, which prevents the tankless water heater from igniting and providing flame to the water heater. If this is the case for your Noritz tankless water heater, your technician will likely sand down the ignition rods.

On the other hand, if the issue stems from a blockage or clog, your technician will have your Noritz tankless water heater up and running in no time. In this case, the technician must clear the blockage or clog by removing the stuck debris.

Lastly, your Noritz tankless water heater’s ignition box may be tapped out. Your technician can tell that this is the issue based on the unit failing to provide a spark. In this case, the technician will need to replace the whole ignition box to get your Noritz tankless water heater up and running again.

Have Another Issue?

It’s not uncommon for tankless water heaters to display several error codes over the course of their lifespan. There are some that are more common in specific regions than others.

In Southern California, specifically the Los Angeles area, we have issues with hard water. Hard water can be the culprit behind several error codes ranging from simple maintenance codes to full-on failures.

If an error code pops up on your Noritz tankless water heater, the best course of action you can take is to talk to a professional. Online resources like this article are helpful to a point, but for your safety and for the speed of your tankless water heater repair, you’ll want to get in touch with a technician.

You’ll also want to keep an eye out for some of the other most common Noritz tankless water heater error codes.

That’s a Wrap on Noritz Error Code 11

We’ve covered what Noritz error code 11 means and how a professional can help you get your Noritz tankless water heater up and running again. Now, you can confidently take the necessary steps to get your home’s hot water back in order.

For over 15 years, we’ve diagnosed and addressed error codes across several of the industry’s leading tankless water heater brands. Our partnership with Noritz gives us an unrivaled knowledge base when it comes to how the company’s tankless water heaters operate inside and out.

If you need help getting rid of an error code on your Noritz tankless water heater and live in Los Angeles County or one of its surrounding areas, visit our tankless water heater service page or click one of the buttons below to schedule a consultation.

If you’re curious to see how you can prevent error codes in the future, be sure to brush up on tankless water heater maintenance. For those unsure of where their Noritz tankless water heater ranks among the rest of the brands, take a look at our full Noritz brand review to get a better picture.

For those who have just purchased their water heater or inherited one through a home sale, get to know your tankless water heater better with our Ultimate Guide to Tankless Water Heaters.