While you wait for answers, we may have found some information which could help you.
Success
Message
fan is idle when it is supposed to be slow running?
If water pressure needle ( blue ) is hiher than 1.5?
Intermittent hot water problem?
no hot water for bath?
How can i resolve intermittent hot water?
how can i fix my heating?
hot water not working?
How to find pressure switch?
diy plumbing?
Changing expanson Vessel?
pressure to high and leak on the outside pipe?
radiators not getting hot?