Tankless Water Heater Repair in Exeter, NH
From ignition failures to flow sensor faults, we handle tankless water heater repair throughout Exeter, NH with clear pricing.
- Descaling and Flush Service
- Licensed Technicians
- Lasting Solutions
- Expert Local Plumbers
Endless hot water again with tankless water heater repair in Exeter, NH.
Don't let a cold shower ruin your day, contact FVR Plumbing for professional tankless water heater repair.
Experienced Tankless Water Heater Repair in Exeter, NH for Gas and Electric Units
At FVR Plumbing, we understand the specific challenges and detailed components of tankless water heaters. Our team provides precise tankless water heater repair services so your system operates efficiently and reliably for your Exeter, NH home.
Our expertise includes:
- Troubleshooting and repairing flow sensor issues.
- Cleaning and descaling heat exchanger passages.
- Igniter, flame rod, flow sensor and thermistor testing and replacement

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

Customers
Why Choose FVR Plumbing for Tankless Water Heater Repair in Exeter, NH?
Our team brings extensive experience with many tankless water heater brands and models, so we can handle any repair challenge effectively.
- Advanced Tools, We use specialized diagnostic tools and equipment to accurately pinpoint problems within your tankless system, avoiding guesswork.
- New Hampshire Expertise, We understand how local water and seasonal conditions can affect tankless systems and fit our solutions accordingly.
- Local Knowledge, We understand how local water conditions and usage patterns can impact tankless water heaters, which shapes our repair strategies.
Citywide Coverage
From downtown to the surrounding suburbs of Exeter, FVR Plumbing ensures complete coverage for all your tankless water heater repair needs. We make it our priority to reach you quickly, minimizing the inconvenience of a malfunctioning unit.
Experienced Team
Our team of plumbers has broad experience with tankless water heater repair, having worked on hundreds of units across New Hampshire.
Safety-First Approach
Safety is paramount in all our tankless water heater repair services, especially when dealing with gas lines and high-temperature components.
Trusted Certified Exeter Plumbing Services Professionals
At FVR Plumbing, we take pride in providing certified plumbing services throughout Exeter, NH. Backed by recognized 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.
Call Us Now
PHCC Plumbing Contractor Recognition
Better Business Bureau (BBB) Accreditation
Angi Certified Pro
ISO 9001 Quality Management CertificationReliable Tankless Water Heater Repair Services in Exeter, NH
Commercial Tankless Water Heater Repair in Exeter
Commercial tankless water heaters in Exeter face heavier usage and require robust repair solutions. Whether it is for a restaurant, hotel or office building, we understand the urgency of maintaining hot water availability. Our commercial tankless water heater repair services address larger capacity units, complex manifold systems and often more serious scaling issues. We prioritize fast, efficient service to minimize disruption to your business operations.

Electric Tankless Water Heater Repair in Exeter, NH
Electric tankless units offer a compact solution but can encounter problems with heating elements or circuit breakers. FVR Plumbing offers professional electric tankless water heater repair in Exeter, NH, addressing electrical faults, confirming proper wiring and replacing faulty elements to restore your hot water supply safely and efficiently.
Emergency Tankless Repair in Exeter
A tankless unit that leaks internally or shows a fault you cannot clear needs prompt 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 meanwhile.
Rinnai Tankless Water Heater Repair in Exeter, NH
Rinnai is a popular tankless brand, and its units can face challenges such as scaling from hard water or issues with their flame rod. Our technicians in Exeter, NH are adept at Rinnai tankless water heater repair, focusing on descaling services, fan motor replacements and fixing issues with gas valve assemblies. We make sure your Rinnai system continues to provide reliable, on-demand hot water, following manufacturer specifications.
Flow Sensor and Thermistor Repair in Exeter
Tankless heaters rely on 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 failed parts. Temperature becomes steady again once readings are accurate.
Gas Tankless Water Heater Repair in Exeter
Gas tankless water heaters require correct gas pressure and proper ventilation for safe operation. Issues can range from gas valve failures to carbon monoxide sensor errors. Our licensed technicians in Exeter perform thorough diagnostics on gas lines, igniters and exhaust systems, so your unit is both functional and safe.
Noritz Tankless Water Heater Repair in Exeter, NH
Noritz tankless heaters are known for their sturdy design, but can sometimes face issues such as flow sensor faults or venting problems. We provide dedicated repair services for Noritz units in Exeter, NH, ensuring proper combustion, water flow and exhaust, which are essential for safe and efficient operation.

Ignition Failure Repair in Exeter, NH
If your tankless unit will not fire, the cause may be a dirty flame rod, a bad igniter, low gas pressure or a blocked intake. We test each component and measure gas pressure at the inlet. Undersized gas lines are a common hidden cause when a tankless unit replaced a tank. We correct the issue so the unit lights reliably.
Tankless Water Heater Repair Near Me in Exeter, NH
Water in much of New Hampshire is soft and often slightly acidic, which can gradually wear down copper pipe and cause pinhole leaks. Our team knows how scale attacks each brand and how to prevent it. That knowledge helps your unit reach its full lifespan.
Searching for tankless water heater repair near me often turns up companies that only replace tanks. FVR Plumbing repairs tankless units with the diagnostic skills they need. We work through error codes systematically to find the real cause.
FVR Plumbing at a Glance
- Fully licensed plumbing team covering Exeter, NH
- 24/7 emergency service with same-day scheduling
- Upfront, flat-rate pricing before work begins
- 4.9-star rated by 840+ New Hampshire customers
Exeter Map
Exeter Information
- Population
- 10,109
- Area codes
- Local
- Service area
- Exeter and communities within 40 miles
- Nearby
- Portsmouth, Durham, Dover, Derry
Tankless water heaters in Exeter, NH are susceptible to mineral buildup from hard water, making regular descaling and prompt repairs important to maintain efficiency and prevent premature system failure.
Expert Services
Trust our professionals for reliable FVR Plumbing solutions in Exeter, NH.
Our Specialized Plumbing Services in Exeter, NH
At FVR Plumbing, we provide a complete range of plumbing services across Exeter, 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 Exeter, NH
Here is how we diagnose and repair your tankless water heater.
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 & 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 proceed with 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 Exeter
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 any work begins.
Typical signs include inconsistent hot water, a sudden loss of hot water, strange noises like banging or popping, a rotten egg smell or error codes displayed on the unit. Any of these symptoms warrant a professional inspection.
In homes with hard water and no softener, once a year is a good rule. Homes with a softener may go longer, but annual inspection is still smart.
Frequent 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 many of these problems.
We stand behind our tankless water heater repairs with a comprehensive warranty on both parts and labor. The exact warranty period will be discussed with you before any work begins, providing you peace of mind.
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 Exeter building department may be necessary. We handle all necessary permitting for you.
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 selection of common parts for various models.
What People Are Saying About Our Plumbing Experts?

Patricia H.
We had a slab leak that two other companies could not find. FVR Plumbing located it in under an hour, explained our options, and the price matched the quote to the dollar.
Slab Leak Repair · Rochester, NH
Emily R.
I called FVR Plumbing for plumbing repair, and the technician was fast, polite, and thorough. They explained the problem clearly and fixed it the same day. I will definitely hire them again. Highly recommended!
Plumbing Repair · Exeter, 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 · Rochester, 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 · Durham, 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 · Derry, NH
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 · Dover, NH













