Navien
Error Codes
E110
Navien
Tankless Water Heater
Navien E110 is an abnormal air-pressure fault — the unit ran its pre-fire …
E030
Navien
Tankless Water Heater
Navien E030 means the exhaust (flue gas) temperature sensor saw the vent gases …
E760
Navien
Tankless Water Heater
Navien E760 means the front display panel and the main control board (PCB) have …
E016
Navien
Tankless Water Heater
Navien E016 is an over-temperature shutdown — the heat exchanger or outlet got …
E012
Navien
Tankless Water Heater
Navien E012 means the flame was established and then dropped out mid-cycle — the …
E060
Navien
Tankless Water Heater
Navien E060 means the air pressure sensor — the part that confirms the …
E004
Navien
Tankless Water Heater
Navien E004 is a false-flame error: the flame-sensing rod is reporting a flame …
E027
Navien
Tankless Water Heater
Navien E027 means the leak-detection sensor in the bottom of the unit found …
E422
Navien
Tankless Water Heater
Navien E422 is a flow-sensor fault — the little turbine wheel that measures how …
E003
Navien
Tankless Water Heater
Navien E003 means ignition failure — the unit asked for heat, opened the gas …