Tankless Water Heater Repair in San Bernardino, CA
Need fast tankless water heater repair in San Bernardino, CA? FKM Plumbing offers prompt service to get your hot water flowing again.
- Expert Diagnostics
- Descaling and Flush Service
- Quick Tankless Heater Repair
- Licensed Technicians
Get Your Tankless Hot Water Fixed Today in San Bernardino, CA.
Call today with your brand and error code and we will come prepared.
Licensed Tankless Water Heater Repair in San Bernardino, CA
FKM Plumbing focuses on complete tankless water heater repair throughout San Bernardino, CA. These advanced units offer significant energy savings and endless hot water, but when issues arise, specialized knowledge is required.
Our expertise includes:
- Troubleshooting ignition and gas supply faults.
- Condensate neutralizer, venting and gas supply sizing fixes
- Reading error codes and component failures

Additional Plumbing Repair Services in San Bernardino, CA
We offer expert plumbing repair services across San Bernardino, CA to stop leaks, clear blockages, and keep every fixture working the way it should.

Customers
Why Choose FKM Plumbing for Tankless Water Heater Repair in San Bernardino, CA?
Choosing FKM Plumbing for your tankless water heater repair means picking a company committed to quality and customer satisfaction.
- Advanced Tools, We use specialized diagnostic tools and equipment to accurately pinpoint problems within your tankless system, preventing guesswork.
- Brand Trained, Our plumbers know the diagnostics for Navien, Rinnai, Noritz, Rheem and Takagi units.
- 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 San Bernardino, FKM Plumbing provides 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 deep expertise in tankless water heater systems, having handled countless repairs across many models and manufacturers. They undergo continuous training to stay current with the latest tankless technologies and repair techniques.
Safety-First Approach
We strictly follow all local San Bernardino and state plumbing codes, so every repair is not only effective but also safe and compliant.
Trusted Certified San Bernardino Plumbing Services Professionals
At FKM Plumbing, we take pride in providing certified plumbing services throughout San Bernardino, CA. 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 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 San Bernardino, CA
Noritz Tankless Water Heater Repair in San Bernardino, CA
Noritz tankless heaters are known for their robust design, but can sometimes face issues such as flow sensor malfunctions or venting problems. We provide specialized repair services for Noritz units in San Bernardino, CA, ensuring proper combustion, water flow and exhaust, which are essential for safe and efficient operation.

Commercial Tankless Water Heater Repair in San Bernardino
Commercial tankless water heaters in San Bernardino face heavier usage and require durable 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 severe scaling issues. We focus on fast, efficient service to minimize disruption to your business operations.
Condensing Tankless Repair in San Bernardino, CA
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 Descaling and Flushing in San Bernardino
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 a smart move for most homes on hard water.
Recirculation Pump Repair in San Bernardino
Many tankless systems use internal or external recirculation to deliver hot water faster. Pump failures, check valve problems or wrong schedule settings can cause long waits or lukewarm water. We test the pump, check valves and controls and set the schedule to match your routine. A properly tuned system saves both water and gas.
Gas Tankless Water Heater Repair in San Bernardino
Gas tankless water heaters require correct gas pressure and proper ventilation for safe operation. Issues can range from gas valve malfunctions to carbon monoxide sensor errors. Our licensed technicians in San Bernardino perform thorough diagnostics on gas lines, igniters and exhaust systems, so your unit is both functional and safe.
No Hot Water Tankless Repair in San Bernardino
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 San Bernardino 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 essential for the safe operation of your unit.

Emergency Tankless Water Heater Repair in San Bernardino, CA
A sudden loss of hot water can be an emergency, especially on a cold morning in San Bernardino, CA. FKM Plumbing offers emergency tankless water heater repair to address critical failures promptly. We are available to troubleshoot issues like major leaks, complete system shutdowns or repeat error codes that prevent any hot water production. Our fast response team works quickly to restore your hot water, often on the same day.
Tankless Water Heater Repair Near Me in San Bernardino, CA
We are proud to be the trusted local experts for tankless water heater repair throughout San Bernardino. 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 Southern California.
When you search for 'tankless water heater repair near me' in San Bernardino, CA, FKM Plumbing is your go-to local expert. Our local teams allow for quick response times to address your urgent hot water needs.
FKM Plumbing at a Glance
- Fully licensed plumbing team covering San Bernardino, CA
- Same-day appointments and 24/7 emergency response
- Clear written estimates, no hidden fees
- 4.8-star rated by 754+ Southern California customers
San Bernardino Map
San Bernardino Information
- Population
- 223,728
- Area codes
- 909/760/951
- Service area
- San Bernardino and communities within 40 miles
- Nearby
- Rialto, Redlands, Fontana, Jurupa Valley
Municipal water across much of Southern California is hard, leaving chalky scale on faucets, showerheads, and inside water heater tanks. 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 FKM Plumbing solutions in San Bernardino, CA.
Our Specialized Plumbing Services in San Bernardino, CA
At FKM Plumbing, we provide a complete range of plumbing services across San Bernardino, CA. 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 San Bernardino, CA
Our systematic approach ensures a thorough diagnosis and effective repair of your tankless unit.
Request a Quote
Contact us at (213) 871-0701 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 San Bernardino
The cost of tankless water heater repair in San Bernardino, CA can range from $150 to $800 or more, depending on the issue. Simple fixes like sensor replacements might be at the lower end, while major component replacements like a heat exchanger could be higher. We provide a detailed estimate after diagnosis.
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.
Most repairs and descaling are done in one to three hours. If a part must be ordered, we usually return within a few business days.
While some basic maintenance like filter cleaning can be done by homeowners, complex repairs involving gas lines, high voltage electricity or delicate internal components should always be left to a licensed professional. DIY attempts can be dangerous and void warranties.
Fluctuating temperatures can come from low flow rates, a dirty inlet filter, a failing flow sensor or scale on the heat exchanger. Crossed hot and cold lines at a fixture can also be the cause.
Error codes can be caused by a variety of issues, such as low water flow, gas supply problems, ignition failures, exhaust blockages or faulty temperature sensors. Each code corresponds to a specific system malfunction.
Many common tankless water heater repairs can be finished within 1 to 3 hours, especially if parts are readily available. More complex issues, like extensive descaling or ordering special parts, might take longer and may require a follow-up visit.
Codes point to specific faults such as ignition failure, flame loss, overheating or scale buildup. Each brand uses its own code list, and we use manufacturer guides to interpret them.
What People Are Saying About Our Plumbing Experts?

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













