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Tankless Water Heater Repair

Swift Solutions, Exceptional Results: Trust BTB Plumbing for Your Tankless Water Heater Repairs!

When it comes to tankless water heater repair needs, By The Book Plumbing is the trusted choice for customers seeking unmatched expertise and exceptional service. Operated by Jame Smith, a master-certified plumber with an unwavering work ethic, impeccable integrity, and a well-earned reputation in the community, we are dedicated to resolving your water heater issues swiftly and effectively. With a specialization in all water heater and tankless water heater services, we possess the skills and knowledge to handle any repair requirement with precision and professionalism.

At By The Book Plumbing, we understand the inconvenience and frustration caused by a malfunctioning tankless water heater. That’s why we prioritize prompt and reliable service, aiming to restore your hot water system to optimal functionality in no time. We guarantee a thorough diagnosis of the problem, followed by expert repairs using top-quality parts and equipment. With BTB Plumbing, you can trust that your tankless water heater repair needs will be met with efficiency, transparency, and a commitment to your complete satisfaction. Contact us today and let us provide the reliable solutions you deserve.

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$600 Federal Tax Credit on Tankless Water Heaters!

Beginning 2023, the expanded version of 25C, now called the Energy Efficient Home Improvement Tax Credit (under the Inflation Reduction Act of 2022), provides a maximum credit of $1,200 annually for most taxpayers. It is $600 for any single energy property item (including Tankless Water Heaters and Boilers)…Learn More

Tankless Water Heater Repair: Ensuring Efficient Performance and Longevity

When it comes to providing hot water on demand, tankless water heaters have become increasingly popular due to their energy efficiency and space-saving design. However, like any other appliance, tankless water heaters may require repair and maintenance over time. In this article, we will explore common issues that can arise with tankless water heaters and provide valuable insights on how to troubleshoot and repair them effectively.

Understanding Tankless Water Heaters

How Do Tankless Water Heaters Work?

Tankless water heaters, also known as on-demand water heaters, operate by heating water directly as it flows through the unit. Unlike traditional storage tank water heaters that continuously heat and store water, tankless systems eliminate the need for a bulky storage tank. When a hot water tap is turned on, cold water enters the unit, passes through a heat exchanger, and gets heated by either a gas burner or an electric element.

Benefits of Tankless Water Heaters

Tankless water heaters offer several advantages over conventional water heaters. These benefits include:

Energy Efficiency: Tankless systems only heat water when it is needed, resulting in lower energy consumption compared to traditional water heaters.

Space Savings: With their compact design, tankless water heaters take up minimal space, making them ideal for smaller homes or apartments.

Continuous Hot Water: Since tankless systems heat water on demand, you can enjoy a continuous supply of hot water without worrying about running out.

Longer Lifespan: Tankless water heaters generally have a longer lifespan than traditional heaters, often lasting over 20 years with proper maintenance.

Common Issues with Tankless Water Heaters

Insufficient Hot Water Supply

One common complaint with tankless water heaters is a lack of sufficient hot water supply. This can be caused by several factors, including undersized units, excessive hot water demand, or a malfunctioning heating element.

Inconsistent Water Temperature

Another issue that users may encounter is inconsistent water temperature. Fluctuations in water temperature can occur if the heater’s flow rate is too high, the temperature setting is improperly adjusted, or there is a problem with the thermostat or sensors.

Ignition Failure

Ignition failure is a common issue with gas-powered tankless water heaters. It can be caused by a variety of factors, including gas supply issues, a malfunctioning igniter or flame rod, or a clogged burner.

Mineral Buildup and Scale

Over time, mineral deposits and scale can accumulate in the heat exchanger of a tankless water heater, affecting its efficiency and performance. This buildup can be caused by hard water, which contains high levels of minerals like calcium and magnesium.

Gas or Electric Component Malfunction

Faulty gas valves, pressure sensors, or electric components can lead to operational issues with tankless water heaters. These malfunctions may result in the unit not turning on, inadequate heating, or inconsistent performance.


Troubleshooting and Repairing Tankless Water Heaters

Checking for Power Supply Issues

Before diving into specific repairs, it’s important to ensure that your tankless water heater is receiving proper power supply. Check the circuit breaker, fuses, and electrical connections to rule out any electrical issues.

Cleaning the Water Filter

Many tankless water heaters have a water filter to prevent debris from entering the unit. Regularly cleaning or replacing the filter can help maintain optimal performance and prevent clogs.

Flushing the System

Flushing the system is crucial for removing mineral buildup and scale. Follow the manufacturer’s instructions to flush the tankless water heater using a descaling solution or vinegar to dissolve the deposits.

Descaling the Heat Exchanger

For severe mineral buildup, a more thorough descaling of the heat exchanger may be required. Consult the manufacturer’s guidelines or consider hiring a professional to perform this task safely.

Replacing Faulty Components

If troubleshooting steps do not resolve the issue, it may be necessary to replace faulty components such as sensors, valves, or heating elements. Contact a qualified technician or refer to the manufacturer’s instructions for proper replacement procedures.


Preventive Maintenance Tips for Tankless Water Heaters

To prolong the lifespan and ensure the efficient operation of your tankless water heater, consider the following preventive maintenance tips:

Regular Inspection and Cleaning

Periodically inspect the unit for any signs of damage, leaks, or corrosion. Clean the exterior and remove any debris or obstructions around the unit to ensure proper airflow.

Monitoring Water Pressure

Excessive water pressure can strain the tankless water heater and lead to premature wear and tear. Use a pressure gauge to monitor the water pressure and install a pressure regulator if necessary.

Flushing the System Annually

Perform an annual flushing of the tankless water heater to remove sediment and mineral buildup. This will help maintain its efficiency and prevent potential issues.

Professional Servicing

Consider scheduling professional servicing of your tankless water heater at regular intervals. A qualified technician can conduct a thorough inspection, clean the unit, and identify any potential problems before they escalate.


Proper maintenance and timely repairs are essential for keeping your tankless water heater in optimal condition. By understanding common issues, troubleshooting methods, and implementing preventive measures, you can ensure the efficient performance and longevity of your tankless water heater, providing a reliable supply of hot water for your household needs.

Everything You Could Ever Want to Know About Tankless Water Heater Repair

Frequently Asked Questions

Tankless water heaters can last over 20 years with proper maintenance and care.

It is recommended to consult a qualified technician for repairs to ensure proper diagnosis and resolution of issues. DIY repairs can lead to further complications or void warranty coverage.

Yes, there may be a slight delay in hot water delivery with tankless water heaters compared to traditional storage tank heaters. This is due to the time required for the unit to heat the water on-demand.

It is generally recommended to flush your tankless water heater annually to remove mineral deposits and maintain optimal performance. However, the frequency may vary depending on the water hardness and manufacturer’s guidelines.

The cost of repairing tankless water heaters can vary depending on the extent of the issue and the specific components that need replacement. In some cases, repairs may be more expensive than traditional water heaters due to the advanced technology and specialized parts involved.


We know emergency service situations can be stressful. We remove that stress by providing transparent upfront estimates we stick to and guarantee the work we perform. Find out why our customers love working with By the Book Plumbing!