Biasi bi1256114 Air Pressure Switch M90.28 Boiler Safety Component

Product Description

The Biasi BI1256114 is a replacement air pressure switch designed for use with Biasi M90.28 series boilers. This component plays a critical role in the safe operation of gas boilers by confirming that the combustion fan is running correctly before the burner is allowed to ignite. When the fan reaches the correct speed and airflow, the air pressure switch closes, signaling to the printed circuit board that it is safe to proceed with the firing sequence. If the fan fails or airflow drops below the required threshold, the switch remains open and the boiler locks out, preventing combustion from occurring without proper ventilation. This is a key safety feature in modern sealed combustion boilers, protecting against the buildup of dangerous flue gases inside the heat exchanger or living space. HVAC technicians and boiler service engineers rely on this type of component when diagnosing fan circuit faults, pressure switch failures, or boiler lockout codes related to flue or air proving. The Biasi BI1256114 air pressure switch is compatible with multiple boilers in the Biasi M90 range, including the Parva SE M90.28S, Riva Compact M90E.28S, Garda M90F.28S, Garda M90F.28SR, and Riva Plus M90D.28S. Installing the correct OEM replacement switch ensures the boiler control board receives an accurate signal and that safety lockout logic functions as designed. This part should be installed by a qualified gas safe certified technician to ensure proper calibration and system integrity.

• Confirms fan operation before burner ignition, preventing unsafe combustion conditions
• Compatible with Biasi Parva SE, Riva Compact, Garda, and Riva Plus M90.28 series boilers
• Direct OEM replacement for reliable fit and accurate pressure switch response

Product Highlights

The Biasi BI1256114 air pressure switch is an essential boiler safety component that prevents ignition when fan airflow is insufficient, protecting against flue gas hazards in M90.28 series boilers.

Product Information

Standard Information

• Brand: BIASI
• Manufacturer Part Number: BI1256114

Technical Specifications

• Component Type: Air Pressure Switch
• Compatible Series: Biasi M90.28
• Compatible Models: Parva SE M90.28S, Riva Compact M90E.28S, Garda M90F.28S, Garda M90F.28SR, Riva Plus M90D.28S
• Application: Gas Boiler Fan Proving and Safety Lockout