Navien Tankless Water Heater Error Code 010: How to Fix It

Q: What does error code 010 mean on a Navien water heater?

Error code 010 means the ignition retry count exceeded. The unit tried to light multiple times but failed, usually due to gas supply issues, blocked vents, or faulty ignition components.

Q: Can I reset Navien error code 010?

Yes, you can reset the unit by turning off the power for 30 seconds and then turning it back on. However, if the underlying issue is not resolved, the error will return.

Q: How do I clean the flame rod on a Navien tankless water heater?

Turn off power and gas, remove the burner access panel, locate the flame rod (near the burner), and gently clean it with fine-grit sandpaper or a soft cloth. Reassemble and test.

Q: Is error code 010 dangerous?

It is not immediately dangerous, but it indicates a problem that could lead to a gas leak or carbon monoxide poisoning if vents are blocked. Always address it promptly.

Q: Why does my Navien water heater keep showing error 010 after cleaning?

If cleaning doesn't fix it, the issue may be low gas pressure, a faulty gas valve, a defective ignition control board, or improper venting. Professional diagnosis is recommended.

Abstract

Navien error code 010 indicates that the water heater attempted to ignite but failed repeatedly (ignition retry exceeded). This usually points to issues with gas supply, ignition components, or combustion airflow. Follow the steps below to diagnose and fix the problem safely.