Navien Condensing Boiler Error E110: Causes & Fixes
Exhaust vent closed.
Commercial Boiler
Navien Condensing Boiler Error E031: Causes & Fixes
Burner overheating.
Navien Condensing Boiler Error E046: Causes & Fixes
Abnormal operation: heat exchanger overheating sensor.
Navien Condensing Boiler Error E047: Causes & Fixes
Abnormal operation: exhaust thermostat.
Navien Condensing Boiler Error E012: Causes & Fixes
Flame loss.
Navien Condensing Boiler Error E016: Causes & Fixes
Heat exchanger overheat.
Navien Condensing Boiler Error E030: Causes & Fixes
Abnormal operation: exhaust temperature.
Navien Condensing Boiler Error E001: Causes & Fixes
Heat exchanger over temperature.
Navien Condensing Boiler Error E003: Causes & Fixes
Ignition failure.
Navien Condensing Boiler Error E004: Causes & Fixes
False flame detection.