BoilerFaultCodesBiasi E46 Fault Code
The Biasi E46 fault code means: your boiler is struggling to keep its flame lit while it tries to automatically adjust itself for efficient operation.. It appears on 1 Biasi model in our database.
Technical description: Flame signal lost during gas valve commissioning
DIY fix possible
Check that your external gas meter has credit (if on a prepay meter)Verify that other gas appliances in your home, like a hob, are working correctlyPress and hold the 'Reset' button for five seconds to allow the boiler to restart its setup process
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Gas Safe Register →Biasi models that show the E46 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Biasi E46 fault code information on this page is sourced and cross-checked against the official Biasi service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026