Last Updated on December, 2024
Navien, a pioneer in the industry, has designed its tankless water heater with intelligent self-diagnostic tools to simplify troubleshooting.
Navigating the world of Navien tankless water heaters can be tricky when encountering error codes. These codes are an indicator that something’s up with the unit.
While Navien tankless water heaters are known for their efficiency and durability, like any appliance, they can run into issues now and then.
In this article, we’ll break down the most common error codes, helping you understand what they mean and how to tackle them. With this guide, you’ll be better prepared to keep your Navien tankless water heater running smoothly.
Quick Summary
- Some common error codes include issues with gas supply, exhaust temperature, water pressure, and temperature and thermistor problems, and it is important to seek professional help when facing more complex issues.
- Understanding Navien error codes is crucial for maintaining the optimal performance of your tankless water heater.
- It is important to address error codes promptly and seek professional assistance when needed to ensure proper functioning of the Navien tankless water heater and potentially avoid the need for a new boiler in the future.
Contents
- 1 Navien Error Codes and How to Correct Them?
- 1.1 Navien Error Code E001- Ignition Failure
- 1.2 Navien Error Code E002- Exhaust Sensor Problem
- 1.3 Navien Error Code E003- Water Pressure Problem
- 1.4 Navien Error Code E004- False Flame Detection
- 1.5 Navien Error Code E006- Fan Motor Problem
- 1.6 Navien Error Code E010- Exhaust Blockage
- 1.7 Navien Error Code E012- Flue Temperature Issue
- 1.8 Navien Error Code E013- Thermistor Problem
- 1.9 Navien Error Code E015- Temperature Sensor Problem
- 1.10 Navien Error Code E016- Overheating of Heat Exchanger
- 1.11 Navien Error Code E021- Cold Water Inlet Thermistor Problem
- 1.12 Navien Error Code E022- Hot Water Outlet Thermistor Problem
- 1.13 Navien Error Code E027- Overvoltage Problem
- 1.14 Navien Error Code E029- Abnormal Operation of Air Pressure Sensor
- 1.15 Navien Error Code E038- Combustion Issue
- 1.16 Navien Error Code E048- Problem With the Mixing Valve
- 1.17 Navien Error Code E055- Heat Exchanger Problem
- 1.18 Navien Error Code E057- Abnormal Operation of the Water Pressure Sensor
- 1.19 Navien Error Code E060- Abnormal Operation of the Dual Venturi (Gas Valve)
- 1.20 Navien Error Code E069- Abnormal Operation of Fan Motor
- 1.21 Navien Error Code E218- Heating Thermistor Open or Short Circuit
- 1.22 Navien Error Code E782- Abnormal Main Panel Communication
- 2 When to Call in a Professional?
- 3 When to Consider a New Boiler?
- 4 Conclusion
- 5 FAQs
Here’s a list of the most common Navien error codes.
Possible Causes: Ignition failure due to gas supply issues, gas pressure, blocked or dirty air filter, or damaged ignition unit.
What To Do:
- Check the gas supply to ensure proper gas pressure.
- Cleaning can also solve the issue.
- Troubleshoot the ignition device for damage and repair it if necessary.
Possible Causes: Abnormal exhaust temperature due to faulty outdoor temperature sensor or clogged heat exchanger.
What To Do:
- Inspect and replace the sensor if it is faulty.
- Clean or replace the heat exchanger if clogged or damaged.
Possible Causes: Circulation pump issues caused by a faulty pump or wiring connections, or a leak in the boiler system. High pressure may be caused by a faulty expansion vessel or pressure sensor.
What To Do:
- Fix any leaks in the boiler system.
- Check the pump and fix it if it is faulty.
- Ensure all wiring connections are secure and carry out repairs if damaged.
- Regular maintenance can help identify and repair a leak before it escalates.
- Reset the pressure settings.
Possible Causes: Flow sensor problems can be due to one of two reasons: Faulty sensor or faulty wiring connections.
What To Do:
- Check the flow sensor to see if it’s working.
- Check if the igniter is sparking.
- Tighten the ground terminals on the heat exchanger.
Possible Cause: This error is mostly due to a problem in thefan motor due to faulty motor or wiring connections.
What To Do:
- Troubleshoot the fan motor and replace it if necessary.
- Ensure all wiring connections are secure and repair them if damaged.
Possible Causes: Exhaust blockage or improper venting. There are multiple possible causes for this, including a clogged vent pipe, ventilation issues, or problems with installation.
What To Do:
- Inspect and clean the venting system and replace components as necessary.
- Ensure that the venting system has been properly installed and make any necessary adjustments if needed.
Possible Cause: This eros is due to flame loss, which occurs because of insufficient gas supply, low pressure, or a dirty burner.
What To Do:
- Check if the gas valve is half-closed, and ensure proper gas supply and pressure.
- Clean the burner and remove any dirt or debris.
Possible Causes: Issues with the thermistor due to a faulty sensor or wiring connection.
What To Do:
- Inspect and replace the thermistor if it is faulty.
- Ensure all wiring connections are secure and carry out repairs if damaged.
Possible Causes:
This Navien boiler error code indicates a problem with the boiler’s temperature sensor, which may be due to wear and tear or an internal fault in the sensor.
The sensor detects the water temperature and ensures it is within the optimal range by communicating with the boiler’s control system.
What To Do:
- Contact a professional for further troubleshooting to better understand and resolve the issue.
- The professional may need to replace the faulty temperature sensor to correct inaccurate readings.
- He may also need to inspect your Navien boiler for any underlying faults causing the sensor to malfunction.
- Regular servicing is important to detect such issues before they become a problem.
Possible Cause: Overheating of heat exchanger caused by a partially closed water supply valve or a clog in the strainer.
What To Do:
- Check the inlet water filter and strainer.
- Check the heat exchanger and flush if required.
Possible Cause: Water inlet thermistor problem caused by a faulty sensor or faulty wiring connections.
What To Do:
- Inspect and replace the thermistor if it is faulty.
- Ensure all wiring connections are secure and repair them if damaged.
Possible Causes: Heating return thermistor problem caused by a faulty sensor or faulty wiring connections.
What To Do:
- Check the thermistor and the heating supply and replace it if it is faulty.
- Ensure all wiring connections are secure and repair them if damaged.
Possible Causes: Overvoltage problems caused by a power supply surge or faulty electrical components like ground wire issues.
What To Do:
- Check the electrical system and replace any faulty components.
Possible Causes: Air pressure sensor problem caused by a faulty sensor or faulty wiring connections.
What To Do:
- Check if the sensor is working correctly and replace it if it is faulty.
- Ensure all connections are secure and repaired if damaged.
Possible Causes: Problem with the combustion chamber or flame rod. Reasons for this include a dirty or damaged flamed rod or improper combustion.
What To Do:
- Clean the combustion chamber and repair it if necessary.
- Inspect the flame rod and replace it if it is dirty/damaged.
Possible Causes: Problem with the mixing valve caused by a faulty valve or wiring connections.
What To Do:
- Inspect the valve and replace it if it is faulty.
- Ensure all wiring connections are secure and repaired if damaged.
Possible Causes: Problem with the heat exchanger either due to dirt or clogging.
What To Do: Clean or replace the heat exchanger as necessary.
Possible Causes: Problem with water pressure sensor because of a faulty sensor or faulty wiring connections.
What To Do:
- Inspect the sensor and replace it if it is faulty.
- Ensure all wiring connections are secure and repaired if damaged.
Possible Causes: Problem with the dual venturi or regulator due to a faulty valve or regulator or wiring connections.
What To Do:
- Inspect the regulator and replace it if it is faulty.
- Ensure all wiring connections are secure and repaired if damaged.
Possible Causes: Problem with the fan or fan motor due to faulty fan or fan motor or wiring connections.
What To Do:
- Ensure all wiring connections are secure and repaired if damaged.
- Repair or replace fan or fan motor as required.
Possible Causes: Heating return thermistor open or a short in the circuit board.
What To Do:
This error code requires further troubleshooting and should only be resolved by a licensed technician.
Possible Causes: Abnormal main panel communication.
What To Do:
- Check the PCB.
- This error code requires further troubleshooting and should only be resolved by a licensed technician.
When to Call in a Professional?
Addressing Navien boiler error codes requires prioritizing safety and effectiveness. Attempting to resolve boiler problems on your own can pose risks and may result in additional expenses, particularly if you lack the necessary expertise.
For your safety, we strongly recommend contacting a professional for any boiler-related concerns that are out of your scope or look particularly dangerous.
The registered professionals have undergone rigorous training and assessments, ensuring they possess the expertise to work safely and legally with gas appliances. They have the knowledge and tools to accurately diagnose and solve issues, reducing potential hazards.
Choosing professional assistance ensures the correct diagnosis and repair, providing peace of mind that your boiler is operating safely and efficiently.
When to Consider a New Boiler?
When it comes to your boiler’s performance and reliability, addressing Navien boiler error codes is just one aspect to consider. If your boiler is over ten years old and frequently needs maintenance, it could be a sign that it’s nearing the end of its lifespan.
Opting for a new boiler can bring about several advantages. Firstly, newer models are designed for improved efficiency, translating to noticeable savings on your energy bills over time.
Moreover, modern boilers come with the latest technological advances, offering enhanced performance and user-friendly features. These updated models are often quieter in operation, more compact, and simpler to operate compared to an older unit.
So, if you find yourself facing frequent maintenance bills with an older boiler, investing in a new system would be a wise decision to ensure reliable performance, improved efficiency, and increased convenience for your home heating needs.
Useful guides:
- Common Boiler Problems and its solutions
- Vaillant Boiler F28 Fault Code
- Vaillant Boiler F29 Fault Code
Conclusion
In conclusion, understanding Navien tankless water heater error codes is essential for maintaining your heating system’s optimal performance and longevity.
While you can troubleshoot yourself to resolve some basic issues, others may require professional attention to ensure safety and effectiveness. Regular maintenance and timely repairs are crucial in preventing major breakdowns and extending the lifespan of your boiler.
Additionally, staying informed about the age and condition of your boiler can help you make informed decisions about when it might be time to upgrade to a more efficient and reliable system.
By addressing error codes promptly and seeking professional assistance, you can ensure that your Navien tankless water heater continues to operate safely, efficiently, and effectively.