This part is located within the air pressure switch section. The air pressure switch is a safety mechanism which checks the fan is fully operational. It ensures that, if the fan fails within the boiler, there would not be a build up of toxic fumes with no means of extracting them safely. The printed circuit board monitors the air pressure switch to make sure it is fully operational, it will restrict the appliance from firing up if this key feature isn't functioning.
Pressure: 0.2-3 mbar
Technical specification
Waist Sizeab52cg12gvToilet Cistern CapacityFTW--ERP RatingNot ApplicableSupplier Part NumberEDA-22Brand NameWatts