Product Information: The air pressure switch enables safety protocols to check 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 venting them. The PCB closely monitors the air pressure switch to make sure it is completely functional before the unit is fired up, preventing the appliance from starting without one of its key safety devices.

This part is present in 8 different boilers in the Potterton range including the Potterton KINGFISHER MF CF , KINGFISHER MF CF , KINGFISHER MF RS , KINGFISHER MF RS , KINGFISHER MF CF .