While you wait for answers, we may have found some information which could help you.
Success
Message
Heatline boiler showing f5 fault?
problems with hot water on heatline viso 24?
heatline boiler c24?
how can i fix it?
heatline compact s24 boiler?
How can I fix my pcb heatline s 24?
drain bedroom radiator?
heatline s20/s30 boiler?
pressure gauge has fall below 1 bar?
heatline vizo pressurizing?
Heatline solaris fault?
What can I do when my Heatline C24 boiler continuously cuts out?