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rvillarrealSep 8, 2025
What does error E279 mean on my Navien Boiler?
- PPatrick BarnesSep 8, 2025
If your Navien Boiler displays error code E279, which indicates an abnormal system return thermistor, the suggested solution is alarm.
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If your Navien Boiler displays error code E279, which indicates an abnormal system return thermistor, the suggested solution is alarm.
Why is my Navien NHB-55's space heating not working?
If the space heating isn't working on your Navien Boiler, first ensure the boiler is powered on and the temperature setting isn't too low. Check that the power is on, plugged into the outlet with the correct voltage, and the boiler is turned on. Raise the setting temperature. Also, the heating side does not work when the unit is heating domestic hot water.
Why is my Navien NHB-55 Boiler space heating malfunctioning?
The space heating side might not be working because the temperature setting is too low. Also, when the unit is heating domestic hot water (DHW), the heating side will not function. Ensure the boiler is powered on and not in standby mode, and that the setting temperature is appropriately raised.
What does error E004 mean on a Navien NHB-55?
If your Navien Boiler displays error code E004, which indicates a false flame detection, try an auto reset.
What does error E594 mean on my Navien Boiler?
If your Navien Boiler displays error code E594, which indicates an abnormal EEPROM (PCB), the suggested solution is alarm.
How to fix E001 error on Navien NHB-55?
If your Navien Boiler displays error code E001, which indicates the heat exchanger is over temperature, try an auto reset, a manual reset, or a Power On reset.
What does error E205 mean on my Navien NHB-55 Boiler?
If your Navien Boiler displays error code E205, which indicates an abnormal heating supply thermistor, try an auto reset.
What to do if my Navien Boiler is showing error E777?
If your Navien Boiler displays error code E777, which indicates an abnormal LWCO limit (external device), try an auto reset.
What does E047 error code mean on my Navien Boiler?
If your Navien Boiler displays error code E047, which indicates an abnormal operation with the exhaust thermostat, try an auto reset, manual reset, or Power On reset.
What to do if Navien NHB-55 Boiler shows error E109?
If your Navien Boiler displays error code E109, which indicates an abnormal fan motor operation, try a manual reset or a power on reset.
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