Biasi Control Board BI2445104

The Biasi BI2445104 is a printed circuit board that acts as the main control board in Biasi Advance OV appliances. It handles ignition sequencing, fan and pump control, thermostat and sensor inputs, and the safety interlocks that govern burner operation. The board is supplied as a service replacement for the factory-fitted item, so the wiring connections and mounting points match the original.

• The appliance goes to lockout shortly after a call for heat, with no ignition sequence or an interrupted one.
• The display or status indicator is dead, blank or shows an error code that clears only when power is cycled.
• The fan, pump or diverter does not run when demanded, even though the boiler is powered and the external controls are calling.
• Operation is erratic: the boiler fires, drops out and restarts without a change in demand or settings.
• Visible damage on the board itself, such as scorching, a blown track or a swollen capacitor.

• Check the GC number on the appliance data badge against the list above, and confirm the model name matches one of the Advance OV variants.
• Confirm the board currently fitted carries the number BI2445104 or the alternative number 1651586 before ordering.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
• Isolate the electrical supply and photograph the plug and loom positions before removing the old board.