The Worcester Bosch air pressure switch acts as a safety instrument which ensures the fan is fully operational. It ensures that, if the fan fails within the boiler, there will not be a build up of noxious gases with no means of venting them. The printed circuit board closely monitors the air pressure switch to make sure it is completely operational before the unit is fired up, preventing the appliance from starting without one of its key safety mechanisms.
This part fits Worcester 28I NG FSN COMBI
Technical specification
TypePressure SwitchManufacturer Model No87161461590Brand NameWorcester Bosch