Warning: Your Navien boiler has detected a potential safety issue and has shut down to prevent any hazards.
How to Fix Navien Code E004
Step 1: Turn off the boiler and allow it to cool down for at least 30 minutes.
Step 2: Inspect the flame sensor for any signs of dirt or soot. If present, clean it gently with a wire brush.
Step 3: If the issue persists, call a professional HVAC technician for further diagnosis and repair.
How to Reset Navien Code E004
Turn off the unit using the power button on the front panel.
Turn off the gas supply valve.
Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
Restore power at the breaker, then open the gas valve.
Turn the unit back on. If the error returns, the underlying issue needs repair.
What does E004 mean?
The E004 error on your Navien boiler indicates a false flame detection. This means the boiler's sensors have detected an issue with the flame, even though there might not be one. This is a safety feature designed to prevent any potential gas leaks. To resolve this issue, you'll need to troubleshoot and potentially replace some components.
Ensure that the electrical cord is properly grounded.
Navien NFB-H Installation & Operation Manual
116
False Flame
Check electric ground.
Navien NFC-H Installation & Operation Manual
127
False flame detection
Manual RESET Auto RESET
Navien NHB-H Installation & Operation Manual
119
False Flame
Check electric ground.
Navien NPF Installation & Operation Manual
125
False-flame
This error occurs when the flame detector does not operate properly. ● If the furnace is operating properly, this error will be cleared automatically. ● If the furnace is continuously inoperable, contact Technical Support at 1-800-519-8794.