E004 🟡 Repair Required
Navien Error Code E004: False Flame Detection
⚠️ 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.
What Does Navien Error Code 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.
Common Causes of Navien Code E004
- A dirty flame sensor
- A faulty ignition or flame sensor
- Incorrect gas pressure
- A problem with the boiler's control board
Applicable Navien Models
Source Documentation
This error code is documented in 6 official Navien technical manuals.
NFB-H Installation & Operation ManualPage 116
ReasonFalse Flame
ActionCheck electric ground.
Navien NCB-H Installation & Operation ManualPage 129
ReasonFalse Flame
ActionEnsure that the electrical cord is properly grounded.
Navien NFB-H Installation & Operation ManualPage 116
ReasonFalse Flame
ActionCheck electric ground.
Navien NFC-H Installation & Operation ManualPage 127
ReasonFalse flame detection
ActionManual RESET Auto RESET
Navien NHB-H Installation & Operation ManualPage 119
ReasonFalse Flame
ActionCheck electric ground.
Navien NPF Installation & Operation ManualPage 125
ReasonFalse-flame
ActionThis 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.
Need a Pro to Fix Navien Code E004?
A licensed HVAC technician can diagnose and fix this issue quickly.
Find a Licensed Tech Near You →Replacement Parts for Navien Tankless Water Heater Code E004
Flame Sensor OEM: NAVIEN-00000000000000000000000000000000
Gas Valve OEM: NAVIEN-00000000000000000000000000000001
Control Board OEM: NAVIEN-00000000000000000000000000000002