While you wait for answers, we may have found some information which could help you.
Success
Message
Boiler coming up but heating and hot water not working?
air in pipes?
How do I replace an old boiler with minimum change?
Pressurising a Myson Marathon free standinding boiler 50B?
Myson velaire oil pump?
Thermostat question?
has my central heating pump started to seize/jam up?
Myson Touch?
Why red light on ?
coal layout?
My son touch v2 padlock issues?
re: Myson Main Masquerade as Fire?