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 noxious gasses with no means of removing 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.
Fits multiple appliances
Technical specification
Waist Sizeab44cj24gzTypeAir Pressure SwitchToilet Cistern CapacityFTW--Supplier Part NumberC50069U