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When your tankless water heater isn't working like it used to—or stops working altogether—you need fast, knowledgeable service you can trust. At RJ's Heating, Cooling & Water Heaters, we provide expert tankless water heater repair and maintenance in Barrington, IL, helping local homeowners restore comfort, improve performance, and protect their investment.
Whether your system was professionally installed or retrofitted years ago, even the best tankless units require periodic service and occasional repairs. With advanced diagnostics, factory-trained technicians, and years of hands-on experience, RJ's can quickly identify and correct issues with Navien, State, and other major tankless water heater brands.
From unexpected error codes and fluctuating temperatures to annual descaling and performance checks, we offer comprehensive service for gas and electric tankless systems—so your family always has access to clean, efficient hot water.
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Tankless systems are often marketed as "low-maintenance," but they're not maintenance-free. Over time, mineral scale buildup, burner wear, and airflow blockages can reduce efficiency or lead to system failures. Preventive care is essential to ensure:
Just like your furnace or AC, your tankless water heater works hard year-round. With RJ's, you can count on scheduled maintenance that keeps your unit running smoothly—especially during the heavy-use months in Barrington's cold winters.
Tankless systems are dependable, but they can still develop issues—especially if maintenance has been neglected or if the system is aging.
If your tankless water heater is showing signs of trouble—or your energy bills are creeping up despite reduced usage—give RJ's a call. We'll run full diagnostics, provide clear repair options, and restore hot water fast.
Our certified technicians are trained to diagnose and repair both gas and electric tankless systems, including models from Navien, State, Rinnai, Noritz, Bosch, and Rheem. We stock common replacement parts and have access to rapid manufacturer support for more complex issues.
Whether your unit is 2 years old or nearing the end of its lifespan, RJ's provides clear recommendations on repair vs. replacement and never pushes unnecessary services.
A properly maintained tankless water heater can run efficiently for 15 to 20 years or more. Our maintenance service is designed to prevent breakdowns, preserve efficiency, and help you stay ahead of costly repairs.
We recommend annual maintenance for most homes, and biannual service for households with hard water or high usage. Ask about our Comfort Club Plan, which includes scheduled maintenance, discounts on repairs, and priority service for members.
At RJ's Heating, Cooling & Water Heaters, we believe that quality HVAC services should be affordable for every homeowner and business. That's why we offer flexible financing options to help you invest in new heating, cooling, or water heating systems without financial stress.
Whether you need a new furnace, air conditioner, or water heater, our trusted financing partners make it easy to spread out payments over time. Contact us today to learn more about your financing options in Barrington, IL!
Apply NowBecause tankless water heaters are often hidden away in basements, closets, or utility rooms, it's easy to miss early warning signs. If you notice any of the following, it's time to schedule service:
These symptoms are common in aging or neglected systems, but they can often be resolved with a simple flush or sensor replacement—if caught early.
RJ's services nearly all major tankless water heater brands in the Barrington area, including:
If you're unsure of your model or can't find your manual, don't worry—our team can identify the system and access the technical specs needed to diagnose and repair it.
With over 20 years of experience, RJ's is known throughout Barrington and the Northwest Suburbs for prompt, honest service and expert repairs. Our team understands the unique plumbing, venting, and water quality challenges in the area—and we tailor every repair or maintenance plan to your specific system.
We don't just "fix the issue"—we help you understand the cause and how to prevent future problems.
Prevent costly breakdowns and keep your HVAC system running at peak efficiency year-round with our Comfort Club Maintenance Plan. Routine HVAC maintenance improves energy efficiency, extends system lifespan, and prevents unexpected failures. Regular maintenance saves you money on energy bills and prevents costly emergency repairs. Sign up today and enjoy worry-free heating and cooling throughout the Chicagoland area!
Join Our Comfort Club Comfort Club DetailsSeasonal HVAC tune-ups to ensure optimal performance.
Priority service—jump to the front of the line for repairs.
Exclusive discounts on repairs and system replacements.
Extended equipment lifespan through regular maintenance.
Furnace and AC inspections & tune-ups
Ductwork and air filter checks
Refrigerant level and thermostat calibration
Water heater efficiency checks
At RJ's Heating, Cooling & Water Heaters, we are:
As a family-owned HVAC company with over 20 years of experience, we proudly serve Barrington and Northwest Chicago. As an Armstrong Pro and Aprilaire Partner, we deliver trusted, high-quality comfort solutions.
We offer 24/7 emergency service for HVAC and water heaters, upfront pricing with no surprises, and highly rated craftsmanship trusted by home and businessowners throughout the region.
We proudly install and service trusted brands like Armstrong, Ducane, MagicPak, Daikin, Burnham, Weil-McLain, Aprilaire, Reme Halo, and State Water Heaters—ensuring lasting performance and comfort you can rely on.
We proudly serve Barrington, IL, and Northwest Chicago, covering areas such as:
Common reasons include a faulty ignitor, low gas pressure, scale buildup in the heat exchanger, or an error code that has shut the system down. Sometimes it's as simple as a dirty inlet screen or a tripped breaker. RJ's can quickly diagnose and resolve the issue to restore reliable hot water.
Manufacturers like Navien and State recommend annual maintenance to keep the unit running efficiently and to protect the warranty. If you live in an area with hard water, service may be needed every 6–9 months to flush scale buildup and keep the system operating properly.
RJ's performs a full tune-up which includes:
This preventive service ensures your system operates safely, efficiently, and in line with manufacturer guidelines.
Every brand uses specific codes, but common issues include:
If your unit displays any error codes, turn it off and call RJ's. We can safely clear the code and fix the underlying issue.
Yes. Hard water deposits can clog the heat exchanger, reduce flow, trigger error codes, and even lead to premature failure. Regular descaling is essential—especially in Barrington, IL, where local water may contain higher mineral content.
Our technicians will evaluate your system based on:
We never recommend replacement unless it's the most cost-effective long-term option.
Temperature swings can be caused by:
We'll perform a full diagnostic to find the cause and stabilize your system.
Most repairs can be completed within 1–2 hours, especially if it's a common part failure. If we need to order components, we'll schedule a return visit ASAP and ensure you're informed every step of the way.
Noises like clicking, hissing, or banging can indicate burner issues, gas flow irregularities, or air blockage. If your unit is unusually loud or making new sounds, it's best to shut it off and call for service. Continued use can cause further damage or unsafe operation.
While DIY flush kits exist, improper descaling can damage the unit, void your warranty, or miss internal components. RJ's uses professional-grade descaling solutions, follows brand-specific flush procedures, and checks the entire system during the visit—not just the exchanger.
With routine maintenance, most tankless systems from brands like Navien and State will last 15 to 20 years. Lack of maintenance, hard water, and improper installation can significantly shorten lifespan.
Yes. RJ's offers 24/7 emergency tankless water heater repair across Barrington, IL and surrounding communities. Whether you've lost all hot water or your unit is showing error codes, we respond fast to restore comfort.
We service most major tankless brands, including:
If you're unsure of your unit's brand or model, our techs can identify it and source the correct replacement parts.
Check out our latest coupons and special offers to get quality HVAC service at a great price.
A malfunctioning tankless water heater can disrupt your entire day—and the longer you wait, the more you risk long-term damage and higher repair costs. At RJ's Heating, Cooling & Water Heaters, we provide fast, expert tankless water heater repair and maintenance in Barrington, IL, designed to keep your system running smoothly, efficiently, and safely.
Whether your unit is showing error codes, producing inconsistent temperatures, or due for its annual descaling, we're here to help. Our licensed technicians service all major brands, including Navien, State, Rinnai, Noritz, Rheem, and more, and we carry the tools and training to handle everything from minor part replacements to full performance tune-ups.
Preventive maintenance isn't just a recommendation—it's a requirement for warranty protection and long-term performance. We offer professional flushing, sensor calibration, burner cleaning, and diagnostic testing to catch issues early and extend the life of your system. With our Comfort Club Maintenance Plan, you'll never miss a service visit again—and you'll enjoy priority scheduling, repair discounts, and peace of mind all year.
If your tankless unit is underperforming, displaying error codes, or you simply want to keep it running like new, RJ's is your trusted partner in the Northwest suburbs. We proudly serve Barrington, IL, and neighboring communities like Palatine, Schaumburg, Hoffman Estates, Oak Park, and Skokie—with responsive scheduling and upfront pricing.
Annual maintenance is essential for preserving your tankless water heater's warranty and ensuring optimal performance. Most manufacturers require professional service to maintain coverage on critical components like the heat exchanger and control board. Our comprehensive maintenance includes thorough descaling, filter cleaning, and safety checks that keep your system running efficiently and reliably.
Contact RJ's Heating, Cooling & Water Heaters today to schedule your tankless water heater repair or maintenance in Barrington, IL. Let's get started—and make sure your hot water stays reliable, efficient, and endless.
872-274-4502 Schedule Today
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