E6
Nibe
Flame detection / ignition fault
E6 alarm, flame failure or no flame detected (combustion module), burner locks out
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
No fuel supply, blocked burner nozzle, faulty ignition electrodes, defective flame sensor, incorrect gas/oil pressure
How to Fix / Troubleshooting
Safety: Turn off fuel supply and electrical power. Risk of explosion or fire if mis‑handled.
- Check fuel supply: Ensure oil tank is not empty or gas supply valve is open. Verify any external safety shut‑off valves.
- Inspect flue and air paths: Blocked flue or air intake can prevent proper combustion.
- Attempt one reset: Follow the Nibe manual to perform a single burner reset. Do not repeatedly reset a locking‑out burner.
If E6 recurs, a licensed burner technician must inspect and service the burner, electrodes, flame sensor, and fuel system.
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Repair Difficulty
Professional Required
5/5
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