I seem to have a problem that I suspect is not unique to me. I have set up a room with four radiators in it with HR92 valves. They all report binding with the right room name and seem to pick up the demanded temperature from the controller. However, only one of the them ever opens and this one seems to behave completely normally. All the others remain shut with their position at '00'. I originally set this zone to be a 'multi-room' zone but I have since then reverted back to single room.

I have deleted the room and started again and the problem seems to persist, but now the 'good' valve is the one I first programmed. Has anyone got any ideas about this?