Product Information: The air pressure switch acts as a safety mechanism which ensures the fan is working correctly. It ensures that, if the fan fails within the boiler, there would not be a build up of toxic fumes with no means of venting them. The PCB 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 devices.
This part is present in 9 different boilers in the Vokera range including the Vokera COMPACT 25 HE , COMPACT 29 HE , COMPACT 35 HE , SABRE 25 , SABRE 29 .