While you wait for answers, we may have found some information which could help you.
Success
Message
RAVENHEAT RSF84T CUTING IN & OUT?
ravenheat HE 85T bolier water is blowing through auto air vent any ideas?
ravenheat h85t looses pressure on ch only?
Air switch on ravenheat csi system a?
heating?
I have the same problem did you get an answer?
tap water luke warm?
ravenheat 29t ls100t?
Diverter valve?
ravenheat ls 80t?
ravenheat LS80 shower water not as hot as it used to be?
Ravenheat HE85T - no central heating, water working fine though?