The fan is the component that injects fresh air in to the combustion chamber, allowing the gas to be burnt correctly. It also extracts the remaining burnt gas after the combustion process is complete. The boiler has safety protocols in place to make sure no gas can be passed through to the main burner if the fan is not operating correctly .
Fits multiple appliances
Technical specification
Waist Sizeaa44cj13gxToilet Cistern CapacityFTW--ERP RatingNot ApplicableSupplier Part NumberE221Brand NameAndrews