The Saunier Duval air pressure switch is a safety device which checks that the fan is fully operational. It ensures that, if the fan fails within the boiler, there will not be a build up of noxious fumes with no means of extracting them safely.
Colour is grey
Fits multiple Saunier Duval appliances
Technical specification
TypePressure SwitchCompatible WithThemaclassic Plus 30 E, Themaclassic F 30 E, Themaclassic F SB 30 E and Isomax F 28 EManufacturer Model NoS5744100Brand NameSaunier Duval