Chris R - Thanks. It is a fully pumped system. I turned boiler stat down and got rid of all air a week or so ago and though that fixed it - but I still got the problem tonight (boiler stat at '2' (of 5). Turned stat competely off for a couple of hours and pump has circulated the water no...
Thanks for the reply Brumylad. I do have a h/w tank stat and a room stat (dining room). Room stat seems to correctly operate the single motorised valve. h/w stat seems OK (it clicks and if 'off' - and heating off - boiler does not operate).
1) I could try replacing the boiler stat - its just...
Every few days - when the heating has been on for a few hours - all hell breaks loose. There are banging noises and water floods out of the header tank overflow. The header tank water is hot. The radiators and pipes also seem very very hot. 23 yr old Flamingo Boiler & no previous problems...
