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vaillant 828E?

my boiler wont work and keeps coming up F28 what does this mean and how can i put it right

victory
April 2009
VaillantHeating, Home Heating SystemsVaillant 828e Boiler
I think F.28 is not listed in the Fault codes list in the manual, and is in fact "Low Water". Re-pressurise the heating system to 1-00 Bar, the fault should clear when you reset the boiler

Boiler Repair man - Ipswich
April 2009
This is a failure of the gas supply and is usually due to a faulty relay on the circuit board inside the boiler.

John
April 2009

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