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what does f.25 mean on a vaillant ecomax boiler please..?xx?

hia ive got a vaillant ecomax boiler and on the display part it says f.25 and the water pressures down please help me to fix it..xx

Taryn..xx
December 2009
VaillantHeating, Home Heating SystemsVaillant Display Help
There is money in my meter but the vaillant boiler keeps saying f.25 the pressure of the water is just above the first line.. What does this mean

Stacey
March 2017
This work perfect. Thanks

David
January 2014
pressure low on system.fill to 1.2bar from filling loop

tariq
February 2010
To fill your boiler, switch off, then locate the fill handle, it is under the boiler towards the front right hand side. Turn the handle towards the rear of the boiler untill you hear water filling the boiler, look a the pressure guage and when the pointer is just above one bar turn off the fill handle.

RR
December 2009

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