Ferroli H31c no hot water or heating & no fault sign?
How do I stop water from flowing outside from my ferroli optima 901 boiler?
Hi how to increase the water pressure on ferroli optimax 25C?
F40 fault?
how do I change the bar pressure on my boiler? It's a ferolli Optimax 25C?
Heating coming on all times?
How turn off heating in Ferolli Optimax 31c?
Parts for ferroli optimax he 31c ?
i have a ferroli combi boiler i have 1/2 the radiators working and 1/2 not ?
How can i repair a noCN fault on my boiler?
how to fix ferolli boiler?
Ferroli domicondens he26 C fires up but doesn't appear to rectify ?
Over filled my Ferroli boiler?
How do i get the water pressure up please?
Ferroli DOMIcompact F 30 D?
Ferroli Optimax HE 31 C, how do I put water pressure up?
ferroli plus 31c has a code b2 any ideas?
Ferroli Boiler Optimax HE 31C?