The Navien tankless water heater is a reliable and efficient heating system. However, like any appliance, it can encounter occasional errors that disrupt its operation. One of the most common issues is Navien error code 351, which indicates low water pressure in the heating system.
But how do you fix this error and get your Navien water heater working again? Is it a simple DIY solution, or should you seek professional help? In this article, we will unravel the mysteries behind Navien error code 351 and provide you with a comprehensive troubleshooting guide to resolve the issue.
So, if you’re tired of the frustration caused by Navien error code 351 and want to take control of your heating system’s performance, keep reading. Discover the essential steps to identify the causes, implement the solutions, and get your Navien water heater running smoothly once more.
Let’s dive into the troubleshooting process and find out how to fix Navien error code 351!
Key Takeaways:
- Navien error code 351 indicates low water pressure in the heating system.
- Possible causes include water not being refilled, water leaks, issues with the auto feeder, and low water pressure.
- Troubleshooting involves checking the cold water valve, inspecting the auto feeder, and assessing for leaks.
- If the error persists, professional assistance may be required to identify the underlying cause.
- Resolving Navien error code 351 is crucial to restore normal operation of the Navien tankless water heater.
Possible Causes and Solutions for Navien Error Code 351
The Navien error code 351 can occur in situations when the boiler is not calling for heat, which is more likely to happen during warmer days or periods when hot water is not being used. This error code indicates low pressure on the domestic side of the system and can be caused by various factors, including a water filtration system or other underlying causes.
During troubleshooting, it is important to check if the pressure was properly set during the installation process. Additionally, it is crucial to ensure that any external auto-feeder device is functioning correctly. If the pressure drops, the auto-feeder should bring it back to normal by calling for water.
Air in the system or a faulty pressure sensor can also contribute to the occurrence of error code 351. To identify the root cause, monitoring the pressure and thoroughly inspecting the system for leaks or issues with the expansion tank is recommended. If the system continues to lose pressure even when the auto-feeder valve is shut off, there may be a leak in the boiler or elsewhere in the house.
Should your troubleshooting efforts fail to resolve the error, we strongly suggest seeking professional advice and assistance to accurately diagnose and address the underlying issue causing Navien error code 351. By taking these steps, you can restore the normal operation of your Navien tankless water heater and ensure optimal performance.
Conclusion
Navien error code 351 is a common issue that occurs due to low water pressure in the heating system. This error can be triggered by various factors, such as problems with the auto feeder, water leaks, or low water pressure.
To troubleshoot Navien error code 351, it is essential to check the cold water valve to ensure it is open and not frozen. Additionally, inspecting the auto feeder valve for proper functioning and assessing for any water leaks in the system is crucial.
Monitoring the system’s pressure is important to identify any fluctuations or drops that may indicate underlying issues. If the error persists or further investigation is needed, it is highly recommended to seek professional assistance to accurately diagnose and resolve the problem.
Fixing Navien error code 351 requires addressing the root cause, whether it’s a malfunctioning auto feeder, water leaks, or other potential factors. By following the troubleshooting steps and seeking professional help if needed, you can restore the normal operation of your Navien tankless water heater.
FAQ
What does Navien error code 351 indicate?
Navien error code 351 indicates low water pressure in the heating system, causing the boiler to stop operation and automatically refill water.
What are the possible causes of Navien error code 351?
Possible causes of Navien error code 351 include water not being refilled, water overflowing through the condensed water hose, water leaks from the heating pipe, issues with the auto feeder, and low water pressure.
How can I troubleshoot Navien error code 351?
To troubleshoot Navien error code 351, check if the cold water valve is closed or frozen, ensure that the auto feeder valve works normally, inspect the left drain valve of the main heat exchanger, and look for any water leaks due to a defective heat exchanger.
What should I do if the auto feeder valve is not functioning properly?
If the auto feeder valve is not functioning properly, it may need to be replaced.
What if the DHW cold water valve is closed?
If the DHW cold water valve is closed, open it and check the water pressure.
What if there are no leaks and the auto feeder valve is normal?
If there are no leaks, the auto feeder valve is normal, and the DHW cold water valve is open, further inspection may be required to identify the cause of the error.
When is Navien error code 351 more likely to occur?
Navien error code 351 is more likely to occur when the boiler is not calling for heat and during warmer days or when hot water is not being used.
What could cause low pressure on the domestic side of the system?
Low pressure on the domestic side of the system can be caused by a water filtration system or other factors. It is important to check if the pressure was properly set during installation and if any external auto-feeder device is functioning correctly.
What if the system continues to lose pressure even with the auto-feeder valve shut off?
If the system continues to lose pressure even when the auto-feeder valve is shut off, there may be a leak in the boiler or elsewhere in the house. It is recommended to seek professional advice and assistance in such cases.
Is Navien error code 351 a common issue?
Yes, Navien error code 351 is a common issue associated with low water pressure in the heating system.
How can I resolve Navien error code 351?
Resolving Navien error code 351 requires identifying and addressing the underlying cause. This may involve checking the cold water valve, inspecting the auto feeder, and assessing the presence of leaks or other issues. It is important to monitor the system’s pressure and seek professional assistance if the error persists or further investigation is needed.
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