Tankless Water Heater Repair in Kirkland, WA
Hard water and tankless heaters do not mix well without maintenance. Our plumbers in Kirkland, WA descale, diagnose and repair on-demand units fast.
- Expert Local Plumbers
- All Major Tankless Brands
- Expert Diagnostics
- Fast Tankless Heater Repair
Tankless unit flashing a code? Get it repaired quickly in Kirkland, WA.
Don't let a cold shower ruin your day, contact FHN Plumbing for fast and reliable service.
Tankless Water Heater Repair in Kirkland, WA for Every Major Brand
FHN Plumbing focuses on complete tankless water heater repair throughout Kirkland, WA. These advanced units offer real energy savings and endless hot water, but when issues arise, specific knowledge is required.
Our expertise includes:
- Troubleshooting and repairing flow sensor issues.
- Troubleshooting ignition and gas supply problems.
- Reading error codes and component failures

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

Customers
Why Choose FHN Plumbing for Tankless Water Heater Repair in Kirkland, WA?
We are dedicated to providing clear communication, honest assessments and effective repairs every time.
- Brand Trained, Our plumbers understand the diagnostics for Navien, Rinnai, Noritz, Rheem and Takagi units.
- Rapid Response, We prioritize your comfort with quick dispatch and efficient repair services to minimize your downtime.
- Certified Technicians, Our plumbers are factory-trained and experienced with all major tankless water heater brands and models.
Citywide Coverage
We repair tankless water heaters in homes across Kirkland, whether the unit is mounted outside, in the garage or in an interior closet. Fast appointments are available in every neighborhood.
Experienced Team
Each technician at FHN Plumbing is highly experienced in the inner workings of tankless water heaters, from gas and electrical components to flow sensors and heat exchangers. You can trust our team to deliver accurate diagnoses and reliable repair solutions for your unit.
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 Kirkland Plumbing Services Professionals
At FHN Plumbing, we take pride in providing certified plumbing services throughout Kirkland, WA. 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 CertificationReliable Tankless Water Heater Repair Services in Kirkland, WA
Commercial Tankless Water Heater Repair in Kirkland
Commercial tankless water heaters in Kirkland face heavier usage and require robust repair solutions. Whether it is for a restaurant, hotel or office building, we understand the importance of maintaining hot water availability. Our commercial tankless water heater repair services address larger capacity units, complex manifold systems and often more severe scaling issues. We prioritize fast, efficient service to minimize disruption to your business operations.

Emergency Tankless Water Heater Repair in Kirkland, WA
A sudden loss of hot water can be an emergency, especially on a cold morning in Kirkland, WA. FHN Plumbing offers emergency tankless water heater repair to address serious failures promptly. We are available to troubleshoot issues like major leaks, complete system shutdowns or persistent error codes that prevent any hot water production. Our fast response team works quickly to restore your hot water, often on the same day.
Flow Sensor and Thermistor Repair in Kirkland
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 failed parts. Temperature becomes steady again once readings are correct.
Condensing Tankless Repair in Kirkland, WA
Condensing tankless heaters, such as many Navien models, extract extra heat from exhaust and produce condensate. Clogged condensate traps, failed neutralizers and blocked drains can shut the unit down. We clean the trap, replace the neutralizer media and confirm proper drainage. PVC venting is also checked for slope and sagging.
Tankless Repair vs Replacement Cost in Kirkland, WA
Descaling service typically 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.
Navien Tankless Water Heater Repair in Kirkland
Navien units are known for their advanced condensing technology but can sometimes experience issues with their circulation pump or exhaust systems. FHN Plumbing provides specialized Navien tankless water heater repair in Kirkland, 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 Water Heater Error Code Diagnostics in Kirkland, WA
Modern tankless water heaters display error codes to indicate specific problems, from flow rate issues to combustion errors. Our experts in Kirkland, WA are trained to interpret these codes accurately, using dedicated diagnostic tools to pinpoint the exact component failure. This precision 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.

Tankless Descaling and Flushing in Kirkland
Hard water leaves calcium and magnesium scale inside the heat exchanger, limiting flow and causing overheating. Many units warn of this with scale codes, such as the LC code on Rinnai models. We connect a circulation pump to the service valves and run a descaling solution through the exchanger. Annual descaling is wise for most homes on hard water.
Tankless Water Heater Repair Near Me in Kirkland, WA
We pride ourselves on being the trusted local experts for tankless water heater repair throughout Kirkland. Our quick response times and commitment to quality mean residents get their hot water systems back online quickly and efficiently, no matter where they are located in Washington.
Searching for tankless water heater repair near me often turns up companies that only replace tanks. FHN Plumbing repairs tankless units with the diagnostic skills they require. We work through error codes step by step to find the real cause.
FHN Plumbing at a Glance
- Fully licensed plumbing team covering Kirkland, WA
- 24/7 emergency service with same-day scheduling
- Clear written estimates, no hidden fees
- 4.9-star rated by 382+ Washington customers
Kirkland Map
Kirkland Information
- Population
- 91,194
- Area codes
- 425/206/564
- Service area
- Kirkland and communities within 40 miles
- Nearby
- Redmond, Bothell, Bellevue, Shoreline
Municipal water west of the mountains in Washington is typically soft, while supplies on the drier east side tend to run harder. For homes in Kirkland, WA, efficient tankless water heater repair is vital for fighting mineral buildup and keeping hot water consistent in every season.
Expert Services
Trust our professionals for reliable FHN Plumbing solutions in Kirkland, WA.
Our Specialized Plumbing Services in Kirkland, WA
At FHN Plumbing, we provide a complete range of plumbing services across Kirkland, WA. 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 Kirkland, WA
Our tankless water heater repair process in Kirkland, WA is designed for efficiency and transparency, getting your hot water back quickly.
Request a Quote
Contact us at (425) 491-3131 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 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 Kirkland
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.
Minor tankless water heater repairs, such as replacing a sensor or igniter, typically do not require a permit in Kirkland. Major component replacements, changes to the gas or water lines, or replacing the entire unit may require a plumbing permit to ensure code compliance.
Yes, FHN Plumbing stands behind its work. All our tankless water heater repairs come with a satisfaction guarantee and a warranty on both parts and labor. We will provide full warranty details with your repair estimate.
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.
Regular maintenance, particularly annual descaling, is important for tankless water heaters in homes with hard water. It prevents mineral buildup, maintains efficiency, extends the lifespan of the unit and helps avoid costly repairs by catching small issues early.
Common 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 call for a professional inspection.
Many tankless heat exchangers carry long warranties, while other parts usually have shorter coverage. Warranties may require proof of maintenance, which we record.
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 pinpoint the cause.
What People Are Saying About Our Plumbing Experts?

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 · Redmond, WA
Mark T.
When our office needed drain cleaning, FHN Plumbing provided quick, reliable service. The plumber arrived on time and made sure every drain flowed perfectly before leaving. Very satisfied.
Drain Cleaning · Kirkland, WA
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 · Bothell, WA
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 · Redmond, WA
Patricia H.
We had a slab leak that two other companies could not find. FHN Plumbing located it in under an hour, explained our options, and the price matched the quote to the dollar.
Slab Leak Repair · Seattle, WA
Emily R.
I called FHN 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 · Bellevue, WA













