What does Rinnai Tankless Water Heater Error Code 10 mean?

An Error Code 10 on your Rinnai Tankless Water Heater usually means there’s a problem with the venting system. There may be debris blocking the vents or there could be an issue with how the vents were installed.

There are a few things you can do yourself to see if a simple solution will fix your Error Code 10 problem. 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 Durham, Raleigh, Cary, Chapel Hill, Carrboro, or Pittsboro Plumber.

What to Do if Error Code 10 Shows Up on Your Rinnai Water Heater Readout

A morning of suddenly cold showers may send you running to check your Rinnai water heater. Your unit’s computer screen may show an error code, communicating to you that there’s a problem. If an Error Code 10 appears, it could just be a glitch in the pc board (circuit board). You can try turning the water heater off for a short time and then back on. This might reset the readout back to normal and allow the hot water to flow again. You should also check your ventilation system for any obvious obstructions. Bugs and other debris can sometimes be located and removed to restore the full operation of your tankless water heater. Once you’ve tried these options with no success, you should call the skilled Rinnai water heater professionals at Full Stack Plumbing. Going any further with self-repairs can void your manufacturer’s warranty. And if you don’t have plumbing experience, you could do more damage or even get yourself hurt.

Rinnai Tankless Water Heater Error Code 10 Issues

Your Full Stack Plumbing expert checks several potential issues for you. An Error 10 Code often flashes when there’s something wrong with the ventilation system running from a Rinnai tankless water heater. But there are other reasons you might see this error message. These are a few of the most common issues that can cause a tankless water heater to shut down:
  • Ventilation System Blockage – Debris can build in vent/intake pipes. Build-up can also affect a burner manifold.
  • Venting Improper Installation – Venting ducts may not fit together the right way. Sealant may have been used improperly.
  • Circuit Board Malfunction — A problem with the circuit board that runs the water heater could be faulty. A dip switch may be left on the wrong setting.
  • Improper Manifold Settings – Manifolds can regulate the amount of gas or water that flows in or out of your tankless unit. A problem can lead to a system shutdown and an error code.
These are just a few of the issues that your plumber will be checking. Full Stack Plumbers will look for the simplest and easiest solution first. We don’t want to charge our customers for repairs and parts they don’t need. However, if the issue is a bigger problem, we will discuss the solution with you and be ready to take on a larger repair project.

Expert Rinnai Tankless Water Heater Repair at Full Stack Plumbing

Our expert plumbers are ready to take action if your family suddenly loses hot water. We can tell you what error codes mean and get to work resolving the issue. 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 plumbers handles Rinnai water heater repairs and installations in the triangle area, including Chapel Hill, Carrboro, Pittsboro, Raleigh, 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
Full Stack Plumbers walking through front porch at client house

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.
Jim Rumbold
Jim Rumbold
11:59 03 Sep 26
Called this am. Rueben came right out and took care of the situation as well as walking me through the steps and future preventative maintenance. Would definitely recommend full stack to friends and neighbors.
Charles Cockman
Charles Cockman
20:00 07 Aug 25
From scheduling to installation the service was more than acceptable. However I was NOT informed at time of scheduling that the company had changed to flat pricing instead of hourly. Cost of installing a simple kitchen faucet with no connection changes needed. Time of installation was less than an hour for over 300 dollars. Ridiculous
Gail Vanderheyden
Gail Vanderheyden
14:11 12 May 25
They got the job done, but should know better than to come in and out with wet shoes. Should have done better cleaning up afterwards, for the amount of money it cost..
Rachel Meinel
Rachel Meinel
21:28 08 Sep 26
Jacob and Trey were excellent. They were knowledgeable and took the time to answer my questions and explain everything to me clearly. They did the job well and quickly. Bonus points because my dog loved them!
Deb Chapman
Deb Chapman
16:00 06 Sep 26
Excellent service, but I’m quite dismayed that their prices have really sky rocketed. Would love to continue using them, but just can’t spend that much money on snaking drains. 😞
mickey biscoe
mickey biscoe
21:36 04 Sep 26
KNOWLEDGEABLE AND GOOD INTERPERSONAL SKILLS. REPAILE COUNTY WATER LINE TO THE HOUSE
Maria Tanner
Maria Tanner
17:17 04 Sep 26
Jacob was professional, courteous, and very helpful. He diagnosed the issue and determined it wasn’t a plumbing issue.The office personnel were very helpful and courteous.
MVC
MVC
19:18 03 Sep 26
At the home inspection for my recently purchased home the inspector noted several functional and safety issues with a hot water heater that was 18 years old. I planned to replace it, only to find that that it was enclosed in a very small closest in the middle of the house that would require the door to be removed and possibly also widening the door. Full Stack Plumbing, who was highly recommended to me, sent Jacob to assess the situation and to repair the issues identified in the home inspection. He was amazing, honest, and forthright providing me the cost to tune up a HWH that could die in a day. Then he gave me other options to consider. I proceeded with a waterless tank place in a serviceable location. The price was reasonable, the communication was excellent. Jacob called me during the installation process to update me on the progress (I was out of town at the time). I could not be happier with Jacob's knowledge, skills, communication, and kindness. I highly recommend this company for all of your plumbing needs. Thank you to Full Stack and especially to Jacob!
Jason Galloway
Jason Galloway
15:12 03 Sep 26
JJ and his coworker were incredibly responsive and took care of my problem.Would definitely recommend.
Radhika Sachdev
Radhika Sachdev
13:51 03 Sep 26
We had a leak in our sink and Justin was thorough, professional and kind . Great service!
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.

Ucuz Uçak Bileti
Scroll to Top

Full Stack Plumbing & Well Membership

Plumbing Peace of Mind

Prevention is better than costly repairs!

Our membership program is designed to give homeowners peace of mind and to keep your home’s plumbing system operating efficiently. Prevention is always better than costly repairs!

Special Offers

Up to $300 Off

Water Heaters and Whole house Filtration