The Navien Tankless Water Heater Error Codes can be found on the website.

If you experience a problem with your water heater, it may be related to it.The front of the unit will display an error code when an issue arises.

There are many unique error codes that help with the issue.If you press the reset button on the front panel, some problems can be solved.

A suggested fix for the most common error codes can be found below.You can fix simple problems on your own with a few tools, but if you need a professional to help you with more complex problems, you will need to go to the manufacturer.

If you want to fix it, turn off the water heater for 30 minutes.The cold water inlet has a filter.The heat exchanger needs to be flushed.

If you want to fix it, turn off the water heater for 30 minutes.The cold water inlet has a filter.The heat exchanger needs to be flushed.

There are obstructions in the exhaust pipe.Clean the air filter.

All water supply and return lines are open.The internal 2-way valve needs to be checked.