Troubleshooting Tips for Your Tankless Water Heater – Neighborhood Plumbing & Drain

Troubleshooting Tips for Your Tankless Water Heater

Tankless water heaters are a popular choice for homeowners looking for efficiency and convenience in their hot water supply. However, like any appliance, they can occasionally encounter issues that affect their performance. 

Knowing how to troubleshoot common problems can help you keep your tankless water heater running smoothly or determine when to call a professional tankless water heater company. In this guide, we’ll explore practical troubleshooting tips and when to reach out to expert services for assistance.


Understanding Your Tankless Water Heater

Before diving into troubleshooting, it’s important to understand how a tankless water heater operates. Unlike traditional units, tankless water heaters provide hot water on demand by heating water directly without the use of a storage tank. When a hot water tap is turned on, cold water travels through a pipe into the unit, where it is heated by either an electric element or a gas burner.


Common Issues and Troubleshooting Techniques

Despite their efficiency, tankless water heaters can experience issues that impact their performance. Here are some common problems and troubleshooting tips:


1. No Hot Water

If your tankless water heater stops producing hot water, check if there’s a power issue. Ensure that the unit is plugged in and that no breakers have been tripped. For gas-powered models, verify that the gas valve is fully open and that the unit is getting a gas supply.


2. Inadequate Hot Water

If the water isn’t hot enough, or if it fluctuates in temperature, check for cross-connected pipes, which can allow cold water to mix with the hot water. Also, adjust the thermostat to ensure it’s set to an appropriate temperature. It’s typically recommended to set tankless water heaters to 120 degrees Fahrenheit.


3. System Overload

One of the key features of tankless water heaters is that they supply hot water on demand. However, if too many taps are opened simultaneously, it can overwhelm the unit. If your system shuts down during high usage, reduce the demand and reset the unit. Consider staggering the use of hot water appliances to avoid overloading the heater.


4. Mineral Buildup

In areas with hard water, mineral buildup (scale) can occur inside the heater’s elements. Regular descaling with a vinegar solution or a professional descaling product is crucial. This involves circulating the solution through the unit to dissolve mineral deposits. Check your user manual for specific instructions on how to descale your model.


5. Ignition or Flame Failure

For gas models, ignition or flame failure can be due to several issues. Ensure that the gas is turned on and that the venting is not blocked. Also, check for dirty or misaligned flame rods. Cleaning or adjusting these components can often resolve the issue.


When to Contact a Tankless Water Heater Company

While many minor issues can be resolved with basic troubleshooting, there are situations when it’s best to contact a professional tankless water heater company:

Persistent Issues: If the same problem recurs or multiple issues arise simultaneously, it might indicate a more complex underlying problem that requires professional diagnosis and repair.

Error Codes: Modern tankless water heaters often display error codes that can indicate specific problems. If an error code persists despite basic troubleshooting, a professional technician can provide a more specific diagnosis and solution.

Installation and Maintenance: Improper installation can lead to persistent problems. If you suspect that installation issues are affecting your unit’s performance, having a professional tankless water heater company evaluate and possibly reinstall your heater can prevent further complications.

Regular Maintenance: Regular maintenance by a professional not only helps in extending the life of your tankless water heater but also ensures it runs efficiently. This includes tasks like deep cleaning, checking for gas leaks, and ensuring all electrical connections are secure.


Tankless water heaters are a great investment for continuous hot water supply, but they do require proper maintenance and occasional troubleshooting. By understanding the common issues and how to address them, you can often fix simple problems yourself. 

However, for more complex issues, persistent problems, or when maintenance tasks are beyond your comfort level, it’s wise to contact a professional tankless water heater company. Investing in expert services ensures your tankless water heater operates at peak efficiency, providing reliable hot water for your home.

This approach to maintaining your tankless water heater will help you enjoy the benefits of your investment while avoiding the pitfalls of neglect and incorrect troubleshooting. Whether you tackle the issues yourself or enlist the help of experts, keeping your tankless water heater in top condition is key to ensuring it serves you well for years to come.

Need a professional water heater company? Contact us at 512-266-3566 today!

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