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Mend Ferroli DOMMEGA 3 Flashing Hot Water

how can i fix it?

my ferroli boiler is flashing the letter F on the digital screen and there is no hot water or heating

DAN
August 2009
FerroliFerroli DOMMEGA 3Heating, Home Heating SystemsFlashing Hot Water
requires more info
f should be followed by a number eg f5

ricky
August 2009

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