Navien Error Codes

Navien error codes verified against official Navien support pages, owner's manuals and manufacturer service charts, by appliance.

• Navien tankless water heater error codes

All code pages

Navien tankless water heater E003 (ignition failure) Navien tankless water heater E012 (flame loss) Navien tankless water heater E016 (heat exchanger overheating) Navien tankless water heater E030 (exhaust overheating) Navien tankless water heater E110 (abnormal air pressure) Navien tankless water heater E109 (fan motor abnormal operation)