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Common Issues with Tankless Water Heaters


Tankless water heaters have gained popularity in recent years due to their energy efficiency and space-saving design. Unlike traditional water heaters, which store and continuously heat water in a tank, tankless water heaters heat water on demand, providing hot water instantly whenever needed. 

While tankless water heaters offer numerous benefits, they are not immune to problems. In this blog, we will explore the common issues that can arise with tankless water heaters that will require calling us for water heater services in Salt Lake City.

Inadequate Hot Water Supply

One of the most common issues reported with tankless water heaters is inadequate hot water supply. This problem can occur due to various reasons, including an undersized unit, the cold water sandwich effect, or mineral buildup within the unit. To address this issue, it is essential to adjust the temperature settings, descale the unit to remove mineral buildup, or consider upgrading to a larger unit to meet the hot water demand adequately.

Fluctuating Water Temperature

Fluctuating water temperature can be frustrating for homeowners using tankless water heaters. This problem can be caused by issues such as flow rate problems, and malfunctioning temperature sensors. To stabilize water temperature, we may need to adjust the flow rate, check and calibrate the temperature sensor, and ensure proper ventilation.

Mineral Buildup and Scaling

Tankless water heaters are susceptible to mineral buildup and scaling, especially in areas with hard water. Over time, mineral deposits can accumulate inside the unit, affecting its performance and efficiency. Regular flushing of the system and installing a water softener can help prevent mineral buildup and extend the lifespan of the unit.

Leaks and Water Damage

Leaks and water damage can occur in tankless water heaters, leading to costly repairs and potentially damaging other parts of the home. Poor installation, faulty connections, or corrosion within the unit can contribute to leaks and water damage. It is essential to have the unit professionally inspected and repair or replace any damaged parts to prevent further water damage.

Signs That It’s Time to Call a Professional Plumber

While some tankless water heater issues can be resolved with DIY troubleshooting, certain signs indicate it’s time to call a professional plumber:

  • Persistent problems despite troubleshooting efforts
  • Unusual noises or odors coming from the unit
  • Visible leaks or water damage around the unit
  • Experiencing electrical or gas-related issues
  • The unit is old and has not been properly maintained over time

Maintenance Tips to Prevent Common Issues

To prevent common issues with tankless water heaters and ensure optimal performance, homeowners should follow these maintenance tips:

  • Schedule a water heater flush with our team to remove mineral buildup
  • Check and clean filters to prevent clogs and maintain water flow
  • Install a water softener if necessary to reduce mineral deposits
  • Schedule annual maintenance to identify and address any potential issues early

By understanding the common issues that can arise with tankless water heaters and implementing preventive maintenance measures, homeowners can ensure optimal performance and longevity of their systems.

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