Tankless Water Heater Maintenance Guide

Dec 1, 2023


Welcome to Scott Harrison Plumbing, your trusted source for professional home services, contractors, and plumbing solutions. In this comprehensive guide, we will discuss the importance of tankless water heater maintenance and provide you with valuable tips to ensure the optimal performance and longevity of your unit.

Why Tankless Water Heater Maintenance is Crucial

As a homeowner, it's essential to understand the significance of regular tankless water heater maintenance. Not only does it help in maintaining a constant and reliable hot water supply, but it also helps extend the lifespan of your unit and prevent potential breakdowns.

The Benefits of Regular Maintenance

Regular maintenance offers several benefits, including:

  • Improved energy efficiency
  • Higher cost savings
  • Enhanced performance and water flow
  • Reduced risk of malfunctions and costly repairs

DIY Maintenance Tips for Your Tankless Water Heater

While it's recommended to schedule professional maintenance at least once a year, here are some easy-to-follow DIY maintenance tips:

1. Regular Cleaning

To maintain optimal performance, clean the tankless water heater regularly. Start by turning off the power supply and then remove any debris or sediment buildup from the intake filter. Use a soft brush or cloth to gently clean the filter.

2. Flushing the System

Flushing the unit helps remove mineral deposits that can accumulate over time, affecting its efficiency. Follow the manufacturer's instructions to safely flush your tankless water heater.

3. Checking for Leaks

Regularly inspect the unit for any signs of leaks or dripping water. If you notice any leaks, it's crucial to address them promptly by contacting a professional plumber.

4. Testing the Pressure Relief Valve

The pressure relief valve is an essential safety feature of your tankless water heater. Test it periodically by gently lifting the valve's lever to allow water to flow. Make sure it releases water freely and then snaps back into place correctly.

When to Seek Professional Assistance

While performing DIY tankless water heater maintenance is helpful, it's vital to involve a professional for more complex tasks. Consider seeking professional assistance in the following situations:

1. Annual Professional Maintenance

Schedule an annual maintenance appointment with a licensed plumber to ensure a thorough inspection of your tankless water heater. They have the expertise to identify potential issues and provide appropriate solutions.

2. Unusual Noises or Odors

If you notice strange noises like rattling or popping sounds from your tankless water heater, or strange odors coming from the unit, it's advisable to contact a professional plumber. These can be signs of underlying problems that require immediate attention.

3. Insufficient Hot Water Supply

If you experience a decrease in hot water supply or inconsistent temperatures, it's time to consult a professional. They can diagnose the problem and recommend the necessary repairs or adjustments.


Regular tankless water heater maintenance is vital to ensure its optimal performance, energy efficiency, and longevity. By following these essential tips and seeking professional assistance when needed, you can avoid costly repairs and enjoy a consistent and reliable hot water supply for years to come.

For all your plumbing needs, including professional tankless water heater maintenance, contact Scott Harrison Plumbing today. Our team of expert plumbers is always ready to provide exceptional service and ensure your satisfaction.