Tankless Water Heater Repairs in Metro Atlanta

Tankless water heaters are efficient, reliable, and designed to provide endless hot water—but even the best systems may need repair from time to time. At Paramount Plumbing, we provide expert tankless water heater repair services in Kennesaw to keep your home’s hot water flowing. Whether your system isn’t heating properly, showing error codes, or shutting down completely, our licensed plumbers have the experience and tools to get it working again quickly.

Signs Your Tankless Water Heater Needs Repair

Since tankless systems operate differently from traditional water heaters, their warning signs are unique. Call Paramount Plumbing if you notice:

• No Hot Water – Your system won’t heat at all.

• Fluctuating Temperatures – Water runs hot, then cold, unpredictably.

• Error Codes on the Unit – Digital displays showing system alerts.

• Strange Noises – Clicking, humming, or loud buzzing.

• Mineral Buildup – Hard water scaling inside the system.

• Low Water Pressure – Often linked to clogs or scale buildup.

Ignoring these issues can lead to costly damage—or even complete system failure.

Our Tankless Water Heater Repair Services

Paramount Plumbing specializes in diagnosing and repairing all major brands and models of tankless water heaters. Our services include:

• Error Code Diagnostics – Quickly identifying system alerts and malfunctions.

• Heating Element & Burner Repairs – Restoring efficiency and proper heating.

• Scale Removal & Descaling – Eliminating mineral buildup that restricts performance.

• Water Flow Repairs – Fixing blockages and improving water pressure.

• Gas & Electrical Repairs – Safe, professional solutions for both gas and electric models.

Our team arrives prepared with specialized tools and replacement parts to provide lasting repairs on the spot.

Why Choose Paramount Plumbing for Tankless Repairs?

• Licensed Tankless Experts – Trained in advanced systems and modern technology.

• Fast Service – Prompt repairs to restore your home’s hot water.

• Upfront Pricing – No hidden fees, just honest estimates.

• Long-Term Solutions – We repair the problem, not just the symptom.

• Local Trust – Proudly serving Kennesaw homeowners with reliable service.

Serving Every Home in Atlanta

Tankless water heater problems can affect any home, and Paramount Plumbing is proud to provide repair services across the community:

• High-Rise Condos – Professional repairs for unit-based systems.

• Single-Family Homes – Restoring hot water quickly for everyday comfort.

• HOAs for Condos – Reliable service tailored for community and shared units.

• High-Rise Buildings – Expert repairs for complex tankless systems.

No matter where you live, our team delivers expert repairs with precision and care.

Preventing Future Tankless Water Heater Problems

Tankless water heaters require regular maintenance to perform at their best. Paramount Plumbing also provides tankless system flushing, descaling, and inspections to prevent buildup, improve efficiency, and extend the life of your unit. With proper care, your tankless water heater can last 20 years or more.

Your Local Tankless Water Heater Repair Experts

At Paramount Plumbing, we understand how important hot water is for your home. That’s why we combine advanced training, modern equipment, and a commitment to customer satisfaction in every repair. With our help, your tankless system will run efficiently and reliably—keeping your home comfortable year-round.

FAQ

What are the most common tankless water heater problems? Tankless units are reliable, but several issues come up repeatedly in Kennesaw area homes. Mineral buildup inside the heat exchanger is the single most common problem, caused by North Georgia's moderately hard water leaving calcium deposits that restrict flow and reduce heating efficiency over time. Ignition failure is another frequent issue in gas units, usually caused by a fouled flame sensor, gas supply problems, or a failing igniter. Error codes on the display indicate specific faults such as flow sensor issues, overheating, venting problems, or flame rod contamination, and each code points to a different fix. Cold water sandwich (a brief burst of cold water during a shower) is often mistaken for a fault but is a normal characteristic of tankless operation, though it can be minimized with proper adjustment. Inconsistent water temperature, reduced flow rate, and unusual noises from the unit are other common symptoms that warrant a service call.

Is my tankless water heater worth repairing or should I replace it? Tankless units typically last 20 years or more with proper maintenance, which is nearly twice the lifespan of a traditional tank heater, so repair is almost always the right call for units under 15 years old. The decision gets more nuanced when a unit is 15 to 20 years old, has had multiple repairs recently, or needs a major component such as a heat exchanger replaced. At that point, the cost of the repair should be weighed against the remaining service life. A simple fix like a flame sensor cleaning, igniter replacement, or flow sensor swap is almost always worth doing regardless of age. A full heat exchanger replacement on a 17 year old unit is harder to justify when a new high efficiency unit would come with a full warranty and another 20 plus years of service. We give a straight assessment with every service call so you can make the call based on real numbers rather than guesses.

Why is my tankless water heater showing an error code? Error codes are the unit's way of telling you exactly what is wrong, which makes tankless heaters significantly easier to diagnose than tank units. Common codes across most major manufacturers include ignition failure codes (often tied to gas supply or igniter issues), flame loss codes (usually a dirty flame rod or venting problem), flow sensor codes (indicating mineral buildup, a stuck sensor, or low water flow), overheating codes (tied to scale accumulation or venting restriction), and venting codes (blocked intake or exhaust). Error codes that appear once and clear themselves are sometimes one time events caused by a temporary issue. Codes that repeat or lock out the unit require service. When you call, let us know the make, model, and exact error code displayed, and we can often identify the likely cause before we arrive so we bring the right parts to complete the repair in a single visit.

How often should a tankless water heater be serviced, and what does maintenance include? Tankless units benefit from annual maintenance, and this is the single most important thing you can do to extend the life of the unit and avoid unexpected repairs. A complete tankless service call includes flushing the heat exchanger with a descaling solution to remove mineral buildup (the primary cause of reduced performance and premature failure in Kennesaw area units), cleaning or replacing the water inlet filter, inspecting and cleaning the flame sensor and burner assembly, checking venting connections for obstruction or corrosion, verifying gas pressure and combustion efficiency on gas units, and testing all safety components. For homes with hard water, flushing twice a year rather than annually significantly extends the unit's life. Paramount Plumbing offers scheduled maintenance for tankless units, and we can set up annual service reminders so your unit stays under warranty and operating at peak efficiency year after year.

Call Paramount Plumbing Today

If your tankless water heater isn’t working properly, don’t wait for the problem to get worse. Call Paramount Plumbing for professional tankless water heater repairs in Kennesaw—serving high-rise condos, single-family homes, HOAs, and high-rise buildings.

Call Paramount Plumbing Today for Expert Tankless Repairs!