Worcester Bosch Fan Assembly Sifan WFFB0221-017 87161204930

The Worcester Bosch fan assembly for the 280 RSF NG is the combustion fan unit that pulls flue gases through the heat exchanger and drives them out to the flue terminal. It is built around the Sifan WFFB0221-017 fan and is listed by Worcester Bosch under part number 87161204930. The unit mounts in the flue gas path and its speed is regulated by the boiler control board, so a failing fan affects both combustion and the boiler's ability to prove the flue is clear.

• The boiler locks out or fails to fire shortly after the fan starts, often with a flue or fan fault code on the display.
• A grinding, whining or rumbling noise from the fan housing that gets worse as the boiler runs.
• The fan runs at a fixed speed or fails to reach the speed the control board expects, causing repeated lockouts.
• Overheating or flue-related shutdowns during a demand for heat or hot water.
• Visible damage to the fan impeller, housing or motor windings, or a fan that does not turn freely by hand.

• Confirm the appliance model and GC number against the rating plate before ordering, as the 280 RSF was produced in more than one variant.
• The previous number for this fan is SSA6619/1; check the number stamped on the existing fan to confirm it matches.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.