Carmel
NAVIEN WATER HEATER
CERTIFIED EXPERTS
Carmel’s Navien specialists. Our licensed, Navien-trained and certified plumbers fix error codes, ignition failures, no-hot-water calls, leaking units and recirculation problems on every major Navien model, including NPE-A2 and NPE-S2 units. Need emergency service or an annual descale? We handle both across Carmel, with an upfront price before work begins.
Carmel homeowners rely on Hot Water Pros for Navien repair, maintenance and replacement. We diagnose error codes and ignition failures on NPE-A2 and NPE-S2 units, keep them descaled, and replace them when that’s the smarter spend. Either way, you see the price before we start.
✓ Specialists In Navien Tankless Water Heater Systems
✓ Navien Trained & Certified Technicians
✓ Upfront Pricing Before Work Begins
✓ Same-Day Service Throughout Carmel
✓ 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.
Carmel water and your Navien
Carmel Utilities draws groundwater from 20 wells and softens it to about eight grains of hardness, which it calls moderately hard. The utility notes that softening can drop off during periods of extremely high summer demand.
Even softened water leaves some scale on a Navien heat exchanger over time, so periodic descaling still matters. Our Tankless Carefree Plan includes a yearly descale for $99 a year, and ScaleShot is our citric-acid descaler.
Source: 2025 Carmel Water Quality Report (Carmel Utilities).
Navien problems we fix in Carmel
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 Carmel.
Carmel Navien Tankless Repair FAQs
Why is my Navien tankless water heater not producing hot water?
A Navien in Carmel that stops making hot water usually has one of five problems: an ignition failure, a flow sensor issue, a gas supply problem, scale buildup or an active error code. See our Navien no-hot-water guide; same-day Navien service is available throughout Carmel.
How much does Navien tankless repair cost in Carmel?
Every Carmel Navien repair is priced up front, after we diagnose it and before any work starts. Warranty coverage is available on qualifying repairs, and Tankless Carefree Plan members get 10% off qualifying tankless repairs, up to $100 a visit.
How often should a Navien tankless water heater be flushed?
Plan on a professional descale about once a year. Carmel’s softened water is easier on a Navien than harder water, but scale still builds. The annual descale is included in our Tankless Carefree Plan 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 Carmel?
Yes. We repair Navien tankless water heaters throughout Carmel, from Downtown Carmel to the Village of WestClay. Our Navien-trained technicians handle ignition failures, leaks, recirculation issues, maintenance and error codes. Call or text 317-922-9043 or book online.
Hot Water Pros proudly provides Navien tankless water heater repair throughout Carmel, including Downtown Carmel, Village of WestClay, Clay Terrace, Home Place, and surrounding communities. If your Navien system is displaying an error code, producing inconsistent hot water, or is due for annual maintenance, our Navien trained and certified technicians can help.
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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