Navien Boiler Help Center
Understanding your Navien boiler doesn’t have to be confusing. We’ll help you narrow down the problem before you spend time or money replacing parts.
Help Me Diagnose My BoilerBefore You Call Anyone…
Tip #1: Many ignition errors are not caused by a bad igniter.
Tip #2: Frozen or blocked condensate drains can create multiple error codes.
Tip #3: Repeatedly resetting your boiler may hide the real problem.
E003
Ignition Failure
Gas supply, flame sensor, ignition or venting.
E012
Flame Loss
Combustion, gas pressure or sensor issues.
E016
Overheat
Restricted flow or scale buildup.
E110
Blocked Exhaust
Vent blockage or airflow restriction.
Need More Help?
Answer a few questions and we’ll point you toward the most likely cause of your Navien boiler problem.