BoilerFaultCodesWhat the manual says
Manufacturer manualBurner ignited
From this model's manual
Verified against the Vaillant/Vaillant Ecotec Exclusive 74c27d installation & service manual, page 43.
What causes this fault?
This is not actually a fault, but rather a status message indicating that the boiler has successfully lit the flame. It physically occurs when the gas valve opens and the spark electrode ignites the burner to begin a heating or hot water cycle. You are seeing this because the boiler is functioning exactly as it should during its normal startup sequence.
DIY fix possible
This fault may be fixable without an engineer. Check your manual first.
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Related fault codes
All 71 fault codes on the ecoTEC exclusive 838
Seeing a different code? Every code this model can display, in one place.