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vaillant ecomax foult code f.25?

please help
can't get my boiler to work at all (vaillant ecomax i think it's 800 series)
keeps displaying foult f.25 which is not mentioned in the manual
anybody knows what to do?
i'm freezing

mark, November 2006

home Fix label Heating label_important Home Heating Systems category Vaillantdone

i just had the same problem with my boiler, topped up water to 1bar but now i have f.20, any ideas?

paul, November 2009

F.25 is the water switch. This usually means there is not enough pressure in the heating system. Top up the water to 1 bar and see if this works.

John, November 2006

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vaillant ecomax foult code f.25?

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