Why is My Navien Water Heater Leaking?

Navien water heaters are likely to leak due to various reasons ranging from worn-out parts to improper installation. The common causes of navien water heater leaking are pressure relief valve dysfunction, corrosion, cracked heat exchangers, and loose fittings.

If you notice any water around your navien water heater, it is essential to take immediate action to prevent the issue from escalating and causing significant property damage. Ignoring the problem can lead to flooding, mold growth, and other costly repairs in your home. In this article, we will discuss the common causes of navien water heater leaking, troubleshooting tips, and when to seek professional assistance.

Understanding Navien Water Heaters

Navien water heaters are popular among homeowners due to their cost-effectiveness and energy efficiency. These water heaters feature advanced technology that maximizes hot water output while minimizing energy usage. There are three main types of navien water heaters available: condensing tankless water heaters, condensing combi water heaters, and condensing non-combi water heaters.

Each of these types offers unique benefits and features. Navien water heaters are designed to handle the needs of larger households, making them a popular choice for families. With their high efficiency and long-lasting durability, navien water heaters are worth considering for anyone requiring a reliable and efficient water heater solution for their home.

Common Causes Of Navien Water Heater Leaks

Navien water heaters are prone to leaks due to various reasons that might go unnoticed. Age and usage of the heater can significantly impact the likelihood of a leak occurring. Faulty pipes or valves, corrosion due to hard water or mineral deposits, and high-pressure build-up from the heater are some of the common reasons why a navien water heater may start to leak.

These issues can lead to severe damages and must be addressed as soon as possible. Regular maintenance and professional checkups can help prevent such leaks and increase the lifespan of your water heater. Don’t wait until it’s too late and ensure your navien water heater is in its best shape to avoid any unforeseen damages.

Signs That Your Navien Water Heater Is Leaking

Navien water heaters are known for their efficiency and long-lasting capabilities. However, when these water heaters begin to leak, it can cause a lot of problems. Sometimes, these leaks are not visible, making them hard to detect. But, there are a few signs that can indicate that your navien water heater is leaking.

For example, if you notice a decrease in hot water, low pressure, or odd noises coming from your appliance, a leak may be present. A leaking water heater can lead to serious health and safety concerns in your home. Mold growth, electrical hazards, and water damage are just a few of the potential risks.

Be sure to have your navien water heater inspected regularly to prevent leaks and keep your household safe.

How To Fix A Leaking Navien Water Heater

A leaking navien water heater can be a frustrating and potentially dangerous issue. Depending on the cause of the leak, there are different ways to fix it. Troubleshooting the issue is the first step, and it’s important to identify the source of the problem before attempting any repairs.

Some leaks can be fixed by simply tightening or replacing a loose part, while more complex issues may require professional assistance. It’s important to address leaks quickly, as they can cause damage to your home and potentially result in hazardous conditions.

Overall, fixing a leaking navien water heater requires careful attention and may require the assistance of a qualified technician for more complicated issues.

FAQ For Why Is My Navien Water Heater Leaking

How Do I Identify A Leaking Navien Water Heater?

A puddle of water and moist hand contact on the furnace reveal a leaking water heater.

What Causes My Navien Water Heater To Leak?

A leaking drain valve, failed heat exchanger, loose connections, or a faulty tp valve can cause navien water heaters to leak.

How Serious Is A Leaking Navien Water Heater?

A leaking navien water heater can cause water damage, corrosion, or pose a safety hazard. Call a professional plumber immediately.


Leaking navien water heaters can be a frustrating issue for homeowners. However, understanding the cause of the leakage can go a long way in solving the problem. As we’ve learned, potential causes include loose connections, damaged relief valves, faulty temperature sensors or heat exchangers, and poor installation.

It is important to note that some of these issues can be fixed by the homeowner, while others require the attention of a professional. Keeping up with routine maintenance checks can also prevent leaks from occurring and ensure optimal performance of your water heater.

Remember, do not attempt to troubleshoot or fix anything you are not comfortable with, and always turn off the unit before performing any work on it. By following these tips, you can keep your navien water heater running efficiently and effectively for years to come.

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