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Ferolli Optimax HE 31C expansion vessel change?

How easy is it to change the expansion vessel on a Ferolli Optimax HE31C please? Looks straightforward but nev... [Read more]
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Ferroli Optimax HE31c a26 problem?

I'm having A pressure issue. The system pressure will increase to over 2-3bar and shut off from a starting pos... [Read more]
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Ferroli Optimax HE31c a26 problem?

I'm having A pressure issue. The system pressure will increase to over 2-3bar and shut off from a starting pos... [Read more]
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what is the a62 fault code?

what is the a62 fault code on a ferroli optimax he31c boiler please?
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ferroli optimax plus he31c?

Ican get central heating but no hot water the boiler is firing up when hot water is demande but cold is coming... [Read more]
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Ferroli Optimax HE31C Error Code NOcn?

I have a Ferroli Optimax HE31C Boiler and it has been working fine for years but all of a sudden it has fault ... [Read more]
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ferroli optimax HE31C the digital display is saying 'no CN''? ?

We have no hot water or central heating, no other error code is displayed. I've turned off at the mains, press... [Read more]
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Ferroli Boiler Optimax HE 31C?
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How do i get the water pressure up please?
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Parts for ferroli optimax he 31c ?
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Ferroli DOMIcompact F 30 D?
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boiler indicating f5 causing ?
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feroli optimax fault code a4 ?
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Ferroli Optimax HE31c a26 problem?
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Hi how to increase the water pressure on ferroli optimax 25C?
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Ferroli , Modena 102 Gas boiler?
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ferroli plus 31c has a code b2 any ideas?
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Ferroli Optimax HE 31 C, how do I put water pressure up?
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