Tankless Water Heater Error Codes Falls Church, VA | Troubleshooting Guide
By Dennis Rollins, Owner, Veteran Plumbing Services
If your tankless water heater is flashing a strange error code, don’t panic—but don’t ignore it either.
As a licensed plumber and a Navy Veteran, I’ve seen firsthand how one small code can be the difference between a quick fix and a full system failure.
These codes are your heater’s way of saying, “Hey, something’s not right.”
And if you’re in Falls Church, VA, I’m here to help you decode it before it turns into a cold shower or a hefty repair bill.
What Are Tankless Water Heater Error Codes?
Think of these codes like the check engine light in your car.
They don’t always mean something’s broken—but they do mean something needs your attention.
Some standard codes you might see include:
- Error Code 11: Ignition failure—often due to gas flow or dirty components.
- Error Code 12: Flame failure—usually a gas or air mixture issue.
- Error Code 16: Overheating—scale buildup or restricted water flow.
- Error Code 29: Condensate drain issue—especially common in winter.
- Error Code 61: Fan motor malfunction.
- Error Code 90: Combustion abnormality—dangerous if ignored.
These issues are most commonly found in Rinnai, Navien, Noritz, and Takagi systems—all of which we service in Falls Church.
What Do These Codes Mean for You?
Each of these errors can point to a deeper issue, like mineral buildup from hard water, a clogged vent, or even a failing gas valve.
You might not notice a problem right away, but over time, your system will run less efficiently, resulting in higher energy bills and increased repair costs.
That’s why these codes matter.
They’re not just technical messages—they’re early warnings.
And catching them early is how you stay ahead.
Should You Try to Fix It Yourself?
Some minor issues can be reset by powering the unit off and back on. You can also try cleaning the air intake filter if it’s accessible.
But if the code keeps coming back—or if you hear strange sounds, smell gas, or notice your water isn’t heating—stop right there. This is where a trained, licensed plumber steps in.
What I Do When I Show Up
When I’m called to a tankless heater throwing codes, I don’t just clear the error and leave. I:
- Run a full diagnostic on the system
- Clean and flush the internal components
- Inspect gas lines, pressure, and venting
- Check the circuit board, fan, and condensate drain
- Make sure everything meets local safety codes
My goal? To keep your system running smoothly for years, not just for today.
Falls Church Families Deserve Dependable Hot Water
In Northern Virginia, we experience a range of challenges, from cold winters to hard municipal water, which means tankless water heaters can wear out quickly without proper care.
Whether your unit’s showing a flashing 11 or just not heating right, I’ll get to the bottom of it—quickly, honestly, and with the same discipline I learned serving in the Navy.
Don’t Let Error Codes Cost You
If you see a flashing light or an unusual code, please call me before it results in a full system shutdown.
I’m proud to serve Falls Church with reliable, veteran-owned plumbing services that prioritize your home—and your peace of mind—above all else.
📞 Call Veteran Plumbing Services at 703-791-1339
🔧 Same-day service available in Falls Church, VA
📞 Schedule online Veteran Plumbing Services Anytime — Day or Night
