Tankless Water Heater Repair in Concord, NH
If your tankless unit is giving you trouble in Concord, NH, count on FVR Plumbing for professional diagnostics and long-term tankless water heater repair.
- Fast Tankless Diagnostics
- Quick Tankless Heater Repair
- Condensing Unit Specialists
- Prompt, Reliable Service
Get Your Tankless Hot Water Fixed Today in Concord, NH.
Call today with your brand and error code and we will come prepared.
Professional Tankless Water Heater Repair in Concord, NH
A large share of homes rely on private wells, and some wells carry naturally occurring arsenic, radon or iron that call for treatment. FVR Plumbing sees how mineral-heavy water builds scale inside tankless heat exchangers, setting off overheating and scale warnings. We flush and repair these units and help set up maintenance that keeps them running for years to come.
Our expertise includes:
- Cleaning and descaling heat exchanger passages.
- Heat exchanger descaling with circulation pump and service valves
- Flushing and descaling tankless heaters

Additional Plumbing Repair Services in Concord, NH
We offer expert plumbing repair services across Concord, NH to fix leaks, restore flow, and keep your system running smoothly.

Customers
Why Choose FVR Plumbing for Tankless Water Heater Repair in Concord, NH?
Choosing FVR Plumbing for your tankless water heater repair means picking a company committed to quality and customer satisfaction.
- Certified Pros, Our plumbers are brand-trained and certified to work on all major tankless water heater brands, ensuring precise diagnostics and repairs.
- Scale Experts, We descale thoroughly and recommend softening or scale filters suited to your water.
- Brand Trained, Our plumbers understand the diagnostics for Navien, Rinnai, Noritz, Rheem and Takagi units.
Citywide Coverage
No matter where you are in Concord, our skilled technicians are dispatched quickly to address your tankless water heater repair needs promptly and professionally.
Experienced Team
Each technician at FVR Plumbing is continuously trained on the latest tankless technologies and repair techniques, which means top-tier service for your system.
Safety-First Approach
Safety is the top priority in all our tankless water heater repair services, especially when dealing with gas lines and high-temperature components.
Trusted Certified Concord Plumbing Services Professionals
At FVR Plumbing, we take pride in providing certified plumbing services throughout Concord, NH. Backed by leading industry credentials, our experienced plumbers combine technical skill with genuine customer care. Whether it is repair, installation, or maintenance, we follow strict safety and quality standards to deliver long-lasting results you can trust.
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PHCC Plumbing Contractor Recognition
Better Business Bureau (BBB) Accreditation
Angi Certified Pro
ISO 9001 Quality Management CertificationProfessional Tankless Water Heater Repair Services in Concord, NH
Tankless Water Heater Error Code Diagnostics in Concord, NH
Modern tankless water heaters display error codes to indicate specific problems, from flow rate issues to combustion errors. Our experts in Concord, NH are trained to interpret these codes accurately, using specialized diagnostic tools to pinpoint the exact component failure. This accuracy allows us to quickly order the correct parts and perform targeted repairs, saving you time and money. We address codes related to burner failures, fan issues and temperature sensor errors, and more.

Electric Tankless Water Heater Repair in Concord, NH
Electric tankless units offer a compact solution but can encounter problems with heating elements or circuit breakers. FVR Plumbing offers expert electric tankless water heater repair in Concord, NH, addressing electrical faults, ensuring proper wiring and replacing faulty elements to restore your hot water supply safely and efficiently.
No Hot Water Tankless Repair in Concord
When your tankless unit fails to produce hot water, it is often due to issues with the ignition, gas supply or a clogged heat exchanger. Our technicians in Concord will thoroughly diagnose the root cause, whether it is a faulty igniter, a pressure sensor malfunction or mineral buildup. We carry common replacement parts for quick fixes, restoring your continuous hot water supply efficiently. We also check for proper venting, which is crucial for the safe operation of your unit.
Navien Tankless Water Heater Repair in Concord
Navien units are known for their advanced condensing technology but can sometimes experience issues with their circulation pump or exhaust systems. FVR Plumbing provides specialized Navien tankless water heater repair in Concord, addressing common problems like ignition failures or condensate drain blockages. Our team is familiar with Navien's parts and troubleshooting protocols, ensuring a precise and effective repair that maintains your unit's high efficiency.
Tankless Repair vs Replacement Cost in Concord, NH
Descaling service usually costs $175 to $350, and sensor or igniter repairs run $250 to $600. Heat exchanger replacement can cost $800 to $1,500 or more unless covered by warranty. A new tankless unit installed usually ranges from $3,000 to $5,500. We compare these costs against the age and condition of your unit.
Emergency Tankless Repair in Concord
A tankless unit that leaks internally or shows a fault you cannot clear needs quick attention. We put first no-hot-water calls and arrive with common sensors, igniters and filters. If a major component like a heat exchanger has failed, we check warranty coverage and order the part. We can often restore partial operation in the meantime.
Flow Sensor and Thermistor Repair in Concord
Tankless heaters use flow sensors to start and thermistors to regulate temperature. A dirty inlet filter or failed sensor causes no hot water, fluctuating temperature or the unit turning off mid-shower. We clean filters, test sensor readings and replace faulty parts. Temperature becomes steady again once readings are accurate.

Pilot Light & Ignition Repair in Concord, NH
For gas-fired tankless water heaters, a malfunctioning ignition system can completely stop hot water production. Our team in Concord, NH diagnoses issues with igniters, flame sensors and gas valves. We confirm proper gas pressure and ventilation are maintained for safe and efficient operation. Timely repair of these components prevents dangerous gas problems and restores your unit's ability to heat water on demand.
Tankless Water Heater Repair Near Me in Concord, NH
If you are searching for 'tankless water heater repair near me' in Concord, NH, FVR Plumbing is your local solution. Our experienced plumbers are familiar with the plumbing infrastructure and common water heater issues homeowners face in this area. We are always ready to provide fast and professional service.
A large share of homes rely on private wells, and some wells carry naturally occurring arsenic, radon or iron that call for treatment. Our team knows how scale attacks each brand and how to prevent it. That knowledge helps your unit reach its full lifespan.
FVR Plumbing at a Glance
- Licensed and insured plumbers serving Concord, NH
- 24/7 emergency service with same-day scheduling
- Clear written estimates, no hidden fees
- 4.9-star rated by 840+ New Hampshire customers
Concord Map
Concord Information
- Population
- 44,629
- Area codes
- Local
- Service area
- Concord and communities within 40 miles
- Nearby
- Manchester, Laconia, Derry, Londonderry
A large share of homes rely on private wells, and some wells carry naturally occurring arsenic, radon or iron that call for treatment. Tankless heaters scale up when water is hard, so expert repair and regular descaling are what keep these high-efficiency units running for their full lifespan.
Expert Services
Trust our professionals for reliable FVR Plumbing solutions in Concord, NH.
Our Specialized Plumbing Services in Concord, NH
At FVR Plumbing, we provide a complete range of plumbing services across Concord, NH. From leak detection to full system installations, our team ensures fast, precise, and affordable service for both residential and commercial properties. Explore our core services below:
How Our Tankless Water Heater Repair Process Works in Concord, NH
Tankless repair starts with the right information, so we ask the right questions first.
Request a Quote
Contact us at (844) 442-1569 to describe your tankless water heater issue. We will gather key details and schedule a convenient service appointment for you.
Diagnosis and Estimate
Our technician arrives, performs a detailed inspection using diagnostic tools, identifies the problem and provides a clear repair estimate before any work begins.
Expert Repair
Once approved, we complete the repair using high-quality parts and industry-best practices. We make sure your tankless unit is fully functional and safe.
Frequently Asked Questions About Tankless Water Heater Repair in Concord
Most tankless repairs cost between $175 and $600, depending on the part. Descaling service often runs $175 to $350, while heat exchanger replacement can exceed $800 if not under warranty. We quote before starting.
Common causes of failure include mineral buildup from hard water, ignition problems, faulty flow sensors, clogged air filters, exhaust venting issues and electrical component failures. Regular maintenance, including descaling, can prevent most of these problems.
Yes, our technicians are trained and experienced in repairing all major tankless water heater brands, including Rinnai, Navien, Noritz, Rheem, Bosch, A.O. Smith and more. We carry a wide range of common parts for various models.
Some homeowners do with a kit if service valves are installed. Diagnosing error codes and replacing sensors, igniters or gas components should be left to a professional.
Yes, regular maintenance, particularly annual descaling where water is hard, is important for tankless water heaters. It prevents mineral buildup, maintains efficiency and extends the lifespan of the unit, often preventing costly repairs.
With regular descaling, tankless heaters often last 15 to 20 years. Without maintenance in hard water, problems can start within a couple of years.
Minor repairs usually do not require a permit. If the repair involves significant changes to the gas or water lines, or if the unit itself is being replaced, a permit from the Concord building department may be necessary. We handle all required permitting for you.
This often comes from low gas pressure, a blocked intake or exhaust, a dirty flame rod or overheating from scale. We test each possibility to find the cause.
What People Are Saying About Our Plumbing Experts?

Daniel K.
A pipe burst at 11 pm and they actually answered. The plumber showed up within the hour, shut everything down, and had us back to normal the next morning. Could not ask for more.
Emergency Plumbing · Rochester, NH
Mark T.
When our office needed drain cleaning, FVR Plumbing provided quick, reliable service. The plumber arrived on time and made sure every drain flowed perfectly before leaving. Very satisfied.
Drain Cleaning · Derry, NH
Robert G.
The trenchless sewer replacement saved our front yard. They walked us through the camera inspection footage first so we knew exactly what we were paying for.
Sewer Line Replacement · Derry, NH
Laura S.
I scheduled a water heater replacement, and the team made the process smooth and affordable. The new unit works perfectly, and they cleaned up after completing the job.
Water Heater Replacement · Rochester, NH
Sofia M.
Two new toilets installed in one visit, no mess left behind, and the tech even adjusted a faucet he noticed was dripping. Fair pricing and really friendly.
Toilet Installation · Derry, NH
James P.
Our commercial plumbing system had a leak under the sink, and FVR Plumbing handled it professionally. The plumbers arrived quickly and restored everything without disruption to our customers.
Commercial Plumbing · Laconia, NH













