FISHERS
NAVIEN WATER HEATER
CERTIFIED EXPERTS
Navien repair from our shop right here in Fishers. Our licensed, Navien-trained and certified plumbers diagnose and repair error codes, ignition failures, no-hot-water problems, leaks and recirculation issues on all major Navien models, including the NPE-A2 and NPE-S2 series. Emergency repair or annual descaling, you’ll get an upfront price before any work begins.
With our shop at 11 Municipal Drive in Fishers, Navien service for Fishers homes is close by. We handle repair, maintenance and replacement for NPE-A2 and NPE-S2 units, from error code diagnostics and ignition failures to annual descaling, and we price every job up front.
✓ Specialists In Navien Tankless Water Heater Systems
✓ Navien Trained & Certified Technicians
✓ Upfront Pricing Before Work Begins
✓ Same-Day Service Throughout Fishers
✓ Licensed Indiana Plumbing Contractor
✓ Navien Error Code Specialists
✓ Annual Tankless Maintenance & Descaling
✓ Warranty Available On Qualifying Repairs
REAL NAVIEN REPAIR
NAVIEN REPAIR IN PROGRESS
A real photo from a Navien tankless repair by Hot Water Pros.
Navien tankless water heater opened up for repair
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.
Professional installation of tankless water heaters for maximum performance and efficiency.
Professional replacement of tankless water heaters for maximum performance and efficiency.
Fast diagnostics and expert repairs to keep your tankless water heater running like new.
Extend the life of your unit and maintain peak performance with professional tankless flushing and cleaning.
Fishers water and your Navien
Depending on your address, Fishers water comes from Citizens Energy Group or Indiana American Water, and your bill tells you which. Indiana American’s Noblesville system, which serves parts of Fishers, reported hardness of about 385 to 467 ppm at its treatment plants in 2025, or roughly 22 to 27 grains per gallon.
At that hardness, scale forms on a Navien heat exchanger and can set off error codes and shutdowns. A yearly descale keeps it in check. It’s included in our Tankless Carefree Plan for $99 a year, and ScaleShot is our citric-acid descaler.
Navien problems we fix in Fishers
Error 109 or 110? Both point to air pressure or venting. Start with our error 109 and error 110 guides.
No hot water? See Navien not producing hot water.
Leaking? See Navien tankless leaking water.
Ready to replace? See tankless water heaters in Fishers.
Fishers Navien Tankless Repair FAQs
Why is my Navien tankless water heater not producing hot water?
Usually one of five things: an ignition failure, a flow sensor issue, a gas supply problem, scale buildup or an active error code. Our Navien no-hot-water guide explains each, and same-day Navien service is available in Fishers.
How much does Navien tankless repair cost in Fishers?
Repair costs depend on the problem. We diagnose first, then give you an upfront price before any work begins. Warranty coverage is available on qualifying repairs, and Tankless Carefree Plan members get 10% off qualifying tankless repairs, up to $100 per visit.
How often should a Navien tankless water heater be flushed?
About once a year. Parts of Fishers get water at 22 grains of hardness or more, so annual descaling is what keeps a Navien efficient. Our Tankless Carefree Plan includes it for $99 a year.
What Does Navien Error Code 003 Mean?
Navien Error Code 003 indicates an ignition failure. This means the unit attempted to ignite but was unable to establish a flame. Common causes include gas supply issues, dirty flame rods, venting problems, or faulty ignition components. Our technicians can quickly diagnose and repair Navien ignition failures. See our Navien error 003 guide.
What Does Navien Error Code 012 Mean?
Navien Error Code 012 indicates flame loss during operation. The burner initially ignited but the flame was not maintained. This can be caused by gas pressure problems, venting restrictions, dirty flame sensors, condensate issues, or component failure. Professional diagnosis is recommended to prevent recurring shutdowns. See our Navien error 012 guide.
What Does Navien Error Code 038 Mean?
Navien Error Code 038 indicates low water pressure within the system. This may be caused by a water supply issue, clogged inlet filter, air in the system, or a malfunctioning pressure sensor. Restoring proper water flow often resolves the problem, but persistent codes should be professionally inspected.
What Does Navien Error Code 110 Mean?
Navien Error Code 110 typically indicates an air pressure or venting issue. Blocked intake or exhaust vents, damaged vent piping, frozen vent terminations, or a faulty air pressure sensor can trigger this code. Proper venting is critical for safe operation and should be inspected by a qualified technician. See our Navien error 110 guide.
What Does Navien Error Code 351 Mean?
Navien Error Code 351 indicates abnormal water pressure in the system. Common causes include high or fluctuating water pressure, a failing pressure-reducing valve or expansion tank, or a faulty sensor. A technician can test your water pressure and find the root cause. See our Navien error 351 guide.
Can I Reset My Navien Water Heater After an Error Code?
Many Navien units can be temporarily reset by pressing the reset button. However, if the error code returns, the underlying problem still exists and should be diagnosed. Repeatedly resetting the unit without addressing the cause can lead to additional damage.
Why Does My Navien Water Heater Keep Showing Error Codes?
Recurring error codes often indicate an unresolved issue such as scale buildup, gas supply problems, venting restrictions, faulty sensors, or failing components. Professional diagnosis can identify the root cause and prevent future breakdowns.
Do You Repair Navien Water Heaters In Fishers?
Yes. Our shop is at 11 Municipal Drive in Fishers, and our Navien-trained technicians repair ignition failures, leaks, recirculation issues, maintenance problems and error codes throughout the city. Call or text 317-922-9043 or book online.
CUSTOMER REVIEWS
What Our Customers Say
“They are extremely professional experts who show up same / next day and provide top quality services.”
Jen W.
“Hot Water Pros did exceptional work for me; they will be my go-to for all future plumbing needs.”
Andrew S.
“They came out and replaced my hot water heater today, the same day that I called them to see if they could help me!”
Laura B.
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