A.O. Smith air pressure differential switch BFC 28N from 17-11-’08: original A.O. Smith spare part, type: Differential air pressure switch. Application: Hot water cylinder (BFC 28 (up to 09-2009)). Manufacturer number: 0309235(S); Instalpunt article number: 8750609.
According to the A.O. Smith parts lists, this part fits 5 models, including A.O. Smith BFC 28 (up to 09-2009), A.O. Smith SGS 28 (up to 09-2009) and A.O. Smith SGS 30 (up to 09-2009). The full list is under “Fits”.
This item is in stock and usually arrives within 3–5 working days.
Check the rating plate of your appliance before ordering; if in doubt, ask the manufacturer or your installer.



