No Hot Water? Same-Day Service Available! Call Now: 317-922-9043
Indianapolis
Water Heater Experts
Repair • Replacement • Tankless • Commercial
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Navien Tankless Water Heater Not Producing Hot Water
Nothing is more frustrating than turning on the faucet and discovering your Navien tankless water heater is not producing hot water.
Whether the problem is a gas supply issue, ignition failure, water flow restriction, error code, scale buildup, or component failure, Hot Water Pros can diagnose the problem and restore reliable hot water service throughout Indianapolis and surrounding communities.
Why Is My Navien Not Producing Hot Water?
Several issues can prevent a Navien tankless water heater from heating water properly.
Some problems are simple, while others require professional diagnosis.
Common causes include:
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Error codes
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Gas supply problems
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Ignition failures
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Dirty inlet filters
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Scale buildup
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Flow sensor problems
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Venting restrictions
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Electrical issues
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Control board faults
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Maintenance neglect
Common Navien Error Codes Associated With No Hot Water
Many homeowners experience no hot water when one of the following codes appears:
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Error 003
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Error 012
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Error 109
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Error 110
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Error 351
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Error 515
If your Navien is displaying an error code, diagnosing the underlying issue is often the fastest path to restoring hot water.
Can I Fix My Navien Myself?
Homeowners can safely check:
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Circuit breaker position
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Gas shutoff valve
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Water supply valves
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Air intake and exhaust vents
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Error code display
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Visible leaks
If the issue persists after basic checks, professional diagnosis is usually recommended.
Signs Your Navien Needs Professional Repair
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No hot water
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Unit repeatedly shuts down
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Frequent error codes
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Inconsistent temperatures
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Unusual noises
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Ignition failures
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Water leaks
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Reduced water flow
No Hot Water From Your Navien? Don't Ignore The Warning Signs
Many no-hot-water complaints begin with minor issues such as dirty filters, vent restrictions, scale buildup, or ignition problems. Left untreated, these issues can lead to larger repairs and repeated shutdowns.
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Hot Water Pros can quickly diagnose the problem and restore reliable hot water to your home.
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Call Today: 317-922-9043
Why Indianapolis Homeowners Choose Hot Water Pros
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Licensed Indiana plumbing contractor
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Experienced with Navien tankless systems
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Same-day service available
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Water pressure diagnostics
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Tankless flushing and maintenance
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Upfront pricing
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Serving Indianapolis, Carmel, Fishers, Westfield, Noblesville, Greenwood, Brownsburg, Whitestown, and Zionsville
Frequently Asked Questions
Why is my Navien running but not producing hot water?
Common causes include ignition failures, gas supply problems, scale buildup, flow restrictions, and component failures.
Can low water pressure cause a Navien to stop producing hot water?
Yes. Low flow conditions can prevent proper operation.
Can a dirty filter cause no hot water?
Yes. A clogged inlet filter can restrict water flow and affect performance.
Why does my Navien have power but no hot water?
The issue may involve gas supply, ignition, sensors, venting, or internal components.
Locally Owned & Operated
Hot Water Pros proudly provides Navien repair throughout Indianapolis, Carmel, Fishers, Westfield, Noblesville, Greenwood, Brownsburg, Whitestown, Cicero, and Zionsville. Our Navien trained technicians can quickly diagnose tankless water heaters and restore reliable hot water to your home.
TANKLESS WATER HEATER SERVICES
WE INSTALL. WE SERVICE. WE GUARANTEE.
​​From installation to maintenance and repairs, we handle all your tankless water heater needs with honest pricing, expert workmanship, and the best brands in the industry.
TANKLESS
INSTALLATION
Professional installation of
tankless water heaters for maximum performance and efficiency.
TANKLESS
REPLACEMENT
Professional installation of
tankless water heaters for maximum performance and efficiency.
REPAIRS
&
MAINTENANCE
Fast diagnostics and expert repairs to keep your tankless water heater running
like new.
FLUSHING
&
CLEANING
Extend the life of your unit
and muntain boax encend with our professiona cleaning service
The plumbing services provided by Hot Water are best in class. They are extremely professional experts who show up same / next day and provide top quality services. I have used them for new plumbing installations as well as emergency situations and they have been incredibly responsive and have provided best in class work.
Jen W.
Hot Water Pros did exceptional work for me; they will be my go-to for all future plumbing needs. Cameron and his crew are incredibly thoughtful, responsive, and professional. Their workmanship is first-rate, and their pricing is very competitive. When my 10-year-old water heater started to leak, they took the time to understand my needs and didn’t try to sell me on installing more than what my family and I need or will use. That kind of service is special.
Andrew S.
Cameron is one of the best contractors I have ever worked with. He’s extremely responsive, trustworthy and communicative. I use him at my personal home and recommend him to all of my clients. I cannot say enough good things about Hot Water Pros!!
Zeida S.