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Keep It Flowing: Essential Tankless Water Heater Maintenance Tips for Year-Round Efficiency

Home | Blog | Published on February 16th, 2026

Tankless water heaters are designed to provide reliable hot water on demand while maintaining strong energy efficiency. Unlike traditional storage systems, they heat water only when it’s needed, which helps reduce standby energy loss and supports consistent performance. However, even high-efficiency systems require routine maintenance to operate at their best.

Because tankless units work by heating water as it flows through the heat exchanger, they are especially sensitive to mineral buildup and restricted airflow. Over time, scale deposits and debris can reduce efficiency and force the system to work harder than necessary.

Establishing a regular maintenance routine helps keep everything running smoothly!

Homeowner learning tankless water heater descaling and filter maintenance in Winder GA

Why Maintenance Is Essential for Tankless Systems

Routine maintenance plays a critical role in preserving both performance and longevity. When internal components remain clean and unobstructed, your system can heat water more effectively and maintain consistent temperatures. Without proper upkeep, mineral accumulation and clogged filters may reduce efficiency and lead to performance issues.

A well-maintained tankless water heater also experiences less strain during operation. This helps support long-term reliability and reduces the likelihood of sudden service disruptions. Preventative care ensures your system continues delivering hot water when you need it most.

Descaling to Prevent Mineral Buildup

Descaling is one of the most important maintenance tasks for any tankless water heater. Minerals naturally present in water can collect inside the heat exchanger, forming a layer that interferes with heat transfer. As scale buildup increases, the system must work harder to achieve the desired water temperature.

An annual descaling service removes these deposits and restores proper heat exchange. This process helps improve energy efficiency, supports steady water flow, and reduces the risk of overheating. Keeping the heat exchanger clean is essential for maintaining peak system performance.

Cleaning Air and Water Filters

Tankless water heaters rely on both air and water filters to function correctly. The air filter ensures proper ventilation and combustion, while the water filter helps prevent debris from entering the unit. When these filters become clogged, the system may display error codes or struggle to maintain consistent operation.

Regularly checking and cleaning these filters allows for proper airflow and water flow throughout the system. This simple step helps prevent unnecessary strain on internal components and keeps the unit operating efficiently.

The Value of Professional Annual Service

While routine filter checks and basic upkeep are important, professional maintenance provides a more comprehensive evaluation. During an annual service visit, technicians inspect connections, test safety controls, verify system settings, and confirm that all components are functioning properly.

Professional service also helps identify potential issues early, before they develop into larger repairs. This proactive approach protects your investment and helps ensure long-term performance.

Consistent Hot Water Starts with Proper Care

Maintaining your tankless water heater is the key to preserving efficiency, preventing unexpected issues, and extending the life of your system. With regular descaling, filter cleaning, and professional inspections, your equipment can continue delivering reliable hot water throughout the year.

If your tankless system is due for maintenance, contact American Comfort Heating and Cooling today to schedule service. Bringing Comfort to America, One Home at a Time.

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Ella M in Lilburn GA's Profile Image
Ella M in Lilburn GA

We called American Comfort to our home to fix our heat and they did an AWESOME job!

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