What does Rinnai Tankless Water Heater Error Code 11 mean?

An error code 11 often points to a problem with the fuel going into your Rinnai water heater. Gas may not be reaching your unit or pressure may be too low. An issue with your ignitor or flame rod might also be the issue.

There are a few things you can check yourself to see if there’s a simple answer to your lack of hot water. If these options don’t work, it’s time to call a professional Rinnai tankless water heater expert at Full Stack Plumbing.

Contact us today to schedule an appointment with a Triangle plumber in Durham, Raleigh, Cary, Chapel Hill, Carrboro, Pittsboro, and beyond.

What Do I Do if Error Code 11 Shows Up on My Rinnai Water Heater?

An error code showing up on your Rinnai Tankless Water Heater can cut off your hot water in an instant. Besides frustrating everyone in the family, an error warning may be pointing to a serious problem.

When a Rinnai unit flashes an error code 11, it may be indicating one of several types of issues. There’s usually either a problem with the gas supply (propane or natural gas) or with the ignition of that gas.

There are a few things you can check yourself, but you should have some experience in plumbing before taking on more complex problems.

You can poke around and end up voiding the manufacturer warranty on your Rinnai water heater. You could endanger yourself and your family when working around these combustible fuels. Always call a professional plumber when you are unsure of what to do.

Here are some of the most common Rinnai tankless water heater problems that lead to an error code 11:

  • No Gas – You can check your gas valve going into your tankless water heater to make sure it’s turned to allow gas to flow. In a newly installed gas water heater, the lines can also have air in them and they would need to be cleared.
  • Incorrect Gas Pressure – If the gas lines don’t deliver enough pressure, your water heater will warn you with an Error Code 11. Your lines may be obstructed and not be letting enough gas through. A problem could exist in the main line outside your home.
  • Ignitor Issue – It’s important to confirm that the ignitor is providing a spark. Carbon build-up can leave an ignitor unable to ignite the gas that is entering. Your ignitor would need to be cleaned.
  • Flame Rod Issue – The wiring leading to the flame rod could be damaged. Dirt on a flame rod or the gasket would have to be cleaned before the water heater would work properly again.

These and other inspections are usually better left to the professionals. The skilled plumbers at Full Stack Plumbing would also check other potential issues. The ventilation for your Rinnai tankless gas water heater could be blocked and causing the error code. Drainage for the unit’s moisture might also be obstructed.

Our experts like to start with the simplest fixes first We never want to provide you with repairs and part replacements that you really don’t need.

Expert Rinnai Tankless Water Heater Repair at Full Stack Plumbing

Our expert plumbers are happy to come to the rescue when your family is suddenly deprived of hot water.  We can tell you what error code 11 and other error codes mean and get to work finding the exact problem.

We are locally owned, and our staff is fully licensed and certified. Full Stack Plumbing offers affordable prices. We also practice transparent pricing. This means you’ll know what you’re paying for and what services you’ll get for your money.

Contact Full Stack Plumbing for Rinnai Water Heater Repair

If your Rinnai tankless water heater suddenly stops working and flashes an error code, don’t hesitate to call the experts at Full Stack Plumbing.

Our team of licensed, trained, and fully insured Raleigh plumbers handle Rinnai water heater repairs and installations in the triangle area, including Chapel Hill, Carrboro, Pittsboro, Cary, and Durham.

Don’t suffer through any more cold showers! Contact us today to schedule an appointment.

You Can Count On Us

Unparalleled Quality with Transparent Pricing

These are our core values, and this is how we build relationships built on trust. We are not a traditional plumbing company, we are associate owned which means that we will always provide you with exceptional service, innovative practices & fair pricing. As water flows, it can cause systems to break down or backup, that’s why Full Stack Plumbing is always on call for all of your plumbing needs in Pittsboro. Simply stated, Full Stack Plumbing will always keep you in the flow.

  • Local and Fair Pricing
  • Efficient Processes
  • Exceptional Customer Service
  • Transparency and Trust

At your Service

You'll Love Our Process

1

Schedule Your Service

When you reach out to us via phone or online through platforms like Yelp, Facebook, or our website, our friendly customer service team will promptly gather your details and help you book a convenient appointment. Choose from our morning or afternoon service windows, and receive immediate confirmation through text.

2

Meet Your Technician

On the day of your service, you’ll get a text with your technician’s name and photo, letting you know they are on their way and will arrive within 30 minutes. Our expert technicians will assess the issue and provide you with transparent estimates for different options (good, better, best) without any obligation. If you decide to proceed, we aim to complete most repairs or installations the same day.

3

Complete and Review

Once the work is completed to your satisfaction, simply finalize the payment using a card or check—whichever suits you best. We don’t accept cash for security reasons. After service, we’ll send an invoice and a request for feedback via email, ensuring everything meets your expectations.

Our Happy Customers

See What Clients Say About Us

Don’t just take our word for it! Read on to see what our satisfied customers have to say about their experiences with us. From our honest pricing to our exceptional service, discover why residents choose us as their trusted local plumber time and time again.
Evan Seagroves
Evan Seagroves
20:56 08 Oct 24
My well pressure switch went out at 8pm, they had my well back up and running by noon the following day!
Brendan Sheridan
Brendan Sheridan
23:02 12 Sep 24
I have used this company a few times and have been very satisfied. They are knowledgeable, won’t try to upsell you, and even with the grossest jobs they are smiling and professional. Highly recommend.
sally baranski
sally baranski
21:02 15 Aug 24
Job well done. Pleasant to work with.
Karen Craig
Karen Craig
15:08 08 Jul 24
Super friendly and informative service. Had to wait a bit, but since it wasn't an emergency situation, it was only a mild inconvenience and not their fault. Busy is good.
James Pike
James Pike
11:02 02 Jul 24
Full Stack did a superb job.Replaced our water heat with ease and everything works perfectly now.
Steve Whitfield
Steve Whitfield
19:52 29 May 24
Guys did a great job, pump is working and we have water 💧 👏 💪 thanks for the good service 👍
Barbara Shannon
Barbara Shannon
18:01 25 Mar 24
We have been using Full Stack for our properties in Cary and Pittsboro. We always receive great service and fair prices!
Richard Hirschfield
Richard Hirschfield
20:39 07 Mar 24
Excellent service. Prompt, efficient and fairly priced. Solved water pressure issues and installed whole house water filter.
Laurie Diegel
Laurie Diegel
22:52 20 Feb 24
Jeff was a huge factor in me not walking away from Full Stack ever entering my home again for any project both plumbing and gas related. I have a couple of gas related issues coming up involving my stove and exterior grill.He and JJ were a delight to deal with. If I had the ability to do my rating over again for last week's visits I would drop my satisfaction level by several points. Unfortunately, I only got a survey for the first visit.Due to my feeling of trust with Jeff, I had him check our water pressure and believed him when he recommended that we replace the pressure gage.Jeff and JJ are assets to your company.In the future I will only hire your company if Jeff does the work.
B LT
B LT
16:01 20 Feb 24
Great! On time and figured out the problem!
js_loader

Ready to Schedule a Service?

We will be on-site to get your kitchen or bathroom functioning properly as if there was never a problem to begin with.

Scroll to Top

Special Offers

Up to $300 Off

Water Heaters and Whole house Filtration