hi lads anyone know the fault code f5 on viessman vitoden 100 cheers
Morning Gents,
I have F5 on my boiler this morning too.
I had a boiler engineer look at it yesterday and he said its a viesmann call out job. Still trying to get through to them, engaged tone, since 8am.
The boiler is 2.5 years old, will they come out at all?
Sounds like he just doesn't know what it is.
Bet it's the jimmy flapper on yours as well. Simple fix.
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