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Haley YorkSep 9, 2025
What does error E594 mean on my Navien Boiler?
- NNicole MaciasSep 9, 2025
If your Navien Boiler displays error code E594, which indicates an abnormal EEPROM (PCB), the suggested solution is alarm.
To Next PageTo Next PageWhat 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.
Why is my Navien NBH 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 to do if my Navien NBH shows error E001?
If your Navien Boiler displays error code E001, which indicates a heat exchanger over temperature issue, try an auto reset, manual reset, or power on reset.
What should I do if my Navien Boiler displays error E003?
If your Navien Boiler shows the error code E003, which indicates an ignition failure, you should try a manual reset or a power on reset.
What does error E736 mean on my Navien Boiler?
If your Navien Boiler displays error code E736, which indicates an abnormal cascade communication, the suggested solution is alarm.
What to do if my Navien NBH 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 should I do if my Navien NBH displays error E517?
If your Navien Boiler displays error code E517, which indicates an abnormal DIP switch setting (PCB), try a manual reset or a power on reset.
What to do if my Navien NBH is showing error E047?
If your Navien Boiler displays error code E047, which indicates an abnormal exhaust thermostat, try an auto reset, a manual reset, or a power on reset.
What does error E004 mean on my Navien NBH Boiler?
If your Navien Boiler displays error code E004, which indicates false flame detection, try an auto reset.
What should I do if my Navien NBH Boiler displays error E291?
If your Navien Boiler displays error code E291, which indicates a supply/return inversion limit, try a manual reset or a power on reset.
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