Tankless Water Heater Maintenance: Keeping Your System Running Smoothly

tankless water heater maintenance

Understanding Tankless Water Heaters

Tankless water heaters, also known as on-demand water heaters, heat water only when it is needed, providing hot water on demand. These systems are more energy-efficient than traditional water heaters, but they require regular maintenance to ensure they operate efficiently and effectively.

Benefits of Tankless Water Heaters

Tankless water heaters offer several benefits, including:

  • Energy efficiency: Tankless water heaters only heat water when needed, reducing energy consumption compared to traditional water heaters.
  • Continuous hot water: Tankless water heaters provide a continuous supply of hot water, eliminating the need for a storage tank.
  • Space-saving design: Tankless water heaters are compact and can be mounted on walls, saving space in your home.

Importance of Maintenance

Regular maintenance is crucial for ensuring the longevity and efficiency of your tankless water heater. Neglecting maintenance can lead to issues such as reduced efficiency, increased energy consumption, and even system failure.

Tankless Water Heater Maintenance Checklist

Here is a checklist of maintenance tasks you should perform regularly to keep your tankless water heater in top condition:

  1. Flushing the System: Flushing the system removes mineral deposits that can accumulate and reduce the efficiency of your water heater. This should be done annually.
  2. Checking for Leaks: Check for any leaks in the system, including around fittings and connections, and repair them promptly.
  3. Inspecting the Venting: Ensure that the venting system is clear of obstructions to prevent carbon monoxide buildup.
  4. Testing the Pressure Relief Valve: Test the pressure relief valve to ensure it is functioning properly.
  5. Checking the Air Intake Filter: If your tankless water heater has an air intake filter, check and clean or replace it as needed.
  6. Inspecting the Water Filter: If your tankless water heater has a water filter, inspect and clean or replace it as needed.
  7. Checking for Error Codes: Monitor the system for any error codes that may indicate a problem and address them promptly.

Professional Maintenance

While some maintenance tasks can be performed by homeowners, it is also recommended to have your tankless water heater serviced annually by a professional. A professional technician can perform more thorough maintenance tasks and ensure that your system is operating at peak efficiency.


Regular maintenance is essential for keeping your tankless water heater running smoothly and efficiently. By following the maintenance checklist and scheduling annual professional maintenance, you can extend the life of your tankless water heater and enjoy continuous hot water in your home.