What to do if my Navien Boiler is showing error E047?
- LLisa MclaughlinAug 31, 2025
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 to do if my Navien Boiler 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 E594 mean on my Navien NHB-080?
If your Navien Boiler displays error code E594, which indicates an abnormal EEPROM (PCB), the suggested solution is alarm.
What does error E004 mean on my Navien NHB-080?
If your Navien Boiler displays error code E004, which indicates false flame detection, try an auto reset.
What does error code E777 mean on a Navien NHB-080?
If your Navien Boiler displays error code E777, which indicates an abnormal operation with the LWCO limit (external device), try an auto reset.
What does error E740 mean on my Navien NHB-080?
If your Navien Boiler displays error code E740, which indicates an abnormal outdoor temperature sensor, the suggested solution is alarm.
What does error code E016 mean on a Navien Boiler?
If your Navien Boiler displays error code E016, which indicates heat exchanger overheat, try a manual reset or a Power On reset.
What does E046 error code mean on my Navien NHB-080 Boiler?
If your Navien Boiler displays error code E046, which indicates an abnormal operation with the heat exchanger overheating sensor, try an auto reset.
What to do if my Navien NHB-080 Boiler shows error E016?
If your Navien Boiler displays error code E016, which indicates heat exchanger overheat, try a manual reset or a power on reset.
What should I do if my Navien NHB-080 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 to do if my Navien Boiler 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.
Defines key safety terms like DANGER, WARNING, and CAUTION.
Explains the meaning of hazard symbols used in the manual.
Lists essential safety measures regarding flammable materials and venting.
Details the NHB Series gas boiler models and their heating capacities.
Diagram showing the key components of the boiler.
Provides heating input, capacity, AFUE, and water pressure ratings.
Illustrates boiler dimensions and lists supply connection sizes.
Explains configuration of operation status and capacity via DIP switches.
Details the procedure for measuring inlet gas pressure.
Outlines the process for converting the boiler from Natural Gas to Propane.
Describes the boiler's front panel interface, including LCD display and buttons.
Explains how to view error codes and reset the boiler.
Guide on how to adjust the space heating water temperature.
Guide on how to adjust the domestic hot water temperature.
Instructions for accessing and viewing the error history log.
Accessing advanced parameter settings for qualified professionals.
Procedure for performing a factory reset on the boiler.
Lists common error codes and their corresponding conditions.
Details the function and troubleshooting checks for major boiler components.
Categorizes error codes by system and provides self-diagnostic actions.
Troubleshooting steps for overheating of heat exchanger.
Troubleshooting steps for ignition failure.
Troubleshooting steps for flame loss.
Troubleshooting steps for fan motor RPM errors.
Troubleshooting steps for air pressure errors.
Troubleshooting steps for heat exchanger output temp sensor errors.
Guides troubleshooting based on observed symptoms like noise or temp issues.
General safety precautions and steps before replacing parts.
Detailed instructions for replacing major components.
Steps for replacing the Printed Circuit Board (PCB).
Instructions for replacing the fuse.
Steps for replacing the combustion air fan.
Instructions for replacing the flame rod.
Steps for replacing the ignition transformer.
Instructions for replacing the Air Pressure Sensor.
Steps for replacing the main gas valve.
Instructions for replacing the water pressure sensor.
Diagram and part numbers for the boiler's case assembly.
Diagram and part numbers for the heat exchanger and waterway components.
Diagram and part numbers for the combustion assembly.
Recommendations for maintaining safe and efficient operation annually.
Template for recording inspection and maintenance tasks.
Overview of owner maintenance tasks by frequency.
Template for recording inspection results.
Defines key safety terms like DANGER, WARNING, and CAUTION.
Explains the meaning of hazard symbols used in the manual.
Lists essential safety measures regarding flammable materials and venting.
Details the NHB Series gas boiler models and their heating capacities.
Diagram showing the key components of the boiler.
Provides heating input, capacity, AFUE, and water pressure ratings.
Illustrates boiler dimensions and lists supply connection sizes.
Explains configuration of operation status and capacity via DIP switches.
Details the procedure for measuring inlet gas pressure.
Outlines the process for converting the boiler from Natural Gas to Propane.
Describes the boiler's front panel interface, including LCD display and buttons.
Explains how to view error codes and reset the boiler.
Guide on how to adjust the space heating water temperature.
Guide on how to adjust the domestic hot water temperature.
Instructions for accessing and viewing the error history log.
Accessing advanced parameter settings for qualified professionals.
Procedure for performing a factory reset on the boiler.
Lists common error codes and their corresponding conditions.
Details the function and troubleshooting checks for major boiler components.
Categorizes error codes by system and provides self-diagnostic actions.
Troubleshooting steps for overheating of heat exchanger.
Troubleshooting steps for ignition failure.
Troubleshooting steps for flame loss.
Troubleshooting steps for fan motor RPM errors.
Troubleshooting steps for air pressure errors.
Troubleshooting steps for heat exchanger output temp sensor errors.
Guides troubleshooting based on observed symptoms like noise or temp issues.
General safety precautions and steps before replacing parts.
Detailed instructions for replacing major components.
Steps for replacing the Printed Circuit Board (PCB).
Instructions for replacing the fuse.
Steps for replacing the combustion air fan.
Instructions for replacing the flame rod.
Steps for replacing the ignition transformer.
Instructions for replacing the Air Pressure Sensor.
Steps for replacing the main gas valve.
Instructions for replacing the water pressure sensor.
Diagram and part numbers for the boiler's case assembly.
Diagram and part numbers for the heat exchanger and waterway components.
Diagram and part numbers for the combustion assembly.
Recommendations for maintaining safe and efficient operation annually.
Template for recording inspection and maintenance tasks.
Overview of owner maintenance tasks by frequency.
Template for recording inspection results.
| Model | NHB-080 |
|---|---|
| Fuel Type | Natural Gas or Propane |
| Heating Capacity | 80, 000 BTU/h |
| Max. Input (NG) | 80, 000 BTU/h |
| Max. Input (LP) | 80, 000 BTU/h |
| Min. Input (NG) | 16, 000 BTU/h |
| Min. Input (LP) | 16, 000 BTU/h |
| Output BTU/h | 80, 000 BTU/h |
| Gas Connection Size | 3/4" NPT |
| Voltage | 120V |
| Type | Condensing Boiler |
| Temperature Range (°F) | 80-180°F |
| Vent Size | 2"/3" |
| Efficiency | 95% AFUE |
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