Navien Water Heater Error Codes
Complete list of Navien water heater error codes with causes and how to fix them.
E001
π΄
Navien Water Heater error code E001: No ignition β ignition failed 3 times.
Technician Required
E002
π΄
Navien Water Heater error code E002: Abnormal flame β burner shut off β¦
Technician Required
E003
π΄
Navien Water Heater error code E003: Ignition failure.
Technician Required
E004
π΄
Navien Water Heater error code E004: False flame detection.
Technician Required
E010
π΄
Navien Water Heater error code E010: Abnormal air pressure β flue or inlet β¦
Technician Required
E011
π’
Navien Water Heater error code E011: Air pressure switch stuck closed.
Technician Required
E012
π’
Navien Water Heater error code E012: Air pressure switch stuck open.
Technician Required
E016
π΄
Navien Water Heater error code E016: Exhaust overheating β flue obstruction.
Technician Required
E017
π’
Navien Water Heater error code E017: Outlet thermistor failure.
Technician Required
E030
π΄
Navien Water Heater error code E030: Exhaust gas temperature too high.
Technician Required
E033
π’
Navien Water Heater error code E033: Cold water inlet thermistor failure.
β DIY Possible
E034
π’
Navien Water Heater error code E034: Outlet thermistor failure.
Technician Required
E035
π’
Navien Water Heater error code E035: Heat exchanger 1 thermistor failure.
Technician Required
E036
π’
Navien Water Heater error code E036: Heat exchanger 2 thermistor failure.
Technician Required
E037
π’
Navien Water Heater error code E037: Recirculation thermistor failure.
Technician Required
E045
π΄
Navien Water Heater error code E045: Water leak detected.
Technician Required
E046
π΄
Navien Water Heater error code E046: Main gas valve fault.
Technician Required
E047
π’
Navien Water Heater error code E047: Hot water outlet thermistor failure.
Technician Required
E060
π’
Navien Water Heater error code E060: Buffer tank thermistor failure.
Technician Required
E061
π’
Navien Water Heater error code E061: Low water pressure.
Technician Required
E062
π’
Navien Water Heater error code E062: Abnormal water pressure sensor.
Technician Required
E063
π’
Navien Water Heater error code E063: Water pressure too high.
Technician Required
E067
π’
Navien Water Heater error code E067: Cold inlet thermistor failure.
β DIY Possible
E109
π΄
Navien Water Heater error code E109: Exhaust blockage / restricted flue.
Technician Required
E110
π’
Navien Water Heater error code E110: Overheat β water too hot at outlet.
Technician Required
E515
π’
Navien Water Heater error code E515: Water flow sensor malfunction.
Technician Required
E725
π’
Navien Water Heater error code E725: High limit safety switch activated.
Technician Required