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Mend Ferroli optimax HE25S Boiler Showing

F40 fault?

Boiler showing F40 on Ferroli optimax HE25S

Barry Smith
February 2023
FerroliFerroli optimax HE25SHeating, Home Heating SystemsBoiler Showing Ferroli
https://aceplumbers.co.uk/ferroli-boiler-error-codes/

Dhdb
February 2023

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