Biasi Flue Temperature Probe & Safety Fuse BI1782103

The Biasi BI1782103 is a flue temperature probe assembly combining an NTC temperature sensor with a safety thermal fuse. It monitors flue gas temperature on Biasi Advance, Inovia and Rinnova appliances and interrupts the circuit if the flue overheats. The NTC element provides the temperature signal to the boiler control, while the thermal fuse acts as a one-shot safety cut-out.

• Boiler locks out or shuts down with a flue or overheat related fault code
• Repeated lockouts that clear on reset but return once the appliance reaches temperature
• Flue temperature readings that are erratic, implausible or absent at the control
• Thermal fuse has operated and the circuit remains open
• NTC resistance reading outside the expected range for the ambient temperature

• Confirm your appliance model against the fit list above
• Check the existing probe and fuse assembly for the BI1782103 part number
• Verify whether the fault lies with the NTC element or the thermal fuse, as both are contained in this assembly
• Check the flue and combustion readings before replacing, in case the overheat condition has another cause