The air pressure switch acts as a safety mechanism which checks the fan is in full working order. It ensures that, if the fan fails within the boiler, there would not be a build up of noxious fumes with no means of venting them. The PCB closely monitors the air pressure switch to make sure it is fully operational before the unit is fired up, preventing the appliance from starting without one of its key safety features.
This part is present in 14 different boilers in the Ravenheat range including the Ravenheat CSI 85 , RSF 82E , LS 100T , CSI SYSTEM 1 LPG, CSI SYSTEM 1 NATURAL GAS. In the next tab there is an appliance grid with links to all boilers that contain this part, Please use this if you would like to view all other spares that fit that model and download the user manual for that appliance. If none of these models match the appliance you have, please contact us before ordering so we can confirm this part is compatible.