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Hi all new to this so pse excuse, I have a conventional indirect coil cylinder on a open vented system running off a suprima boiler. Cylinder was leaking, cant afford new one at mo so drained down removed cylinder and repaired. Re-fitted, filled system heating coil flow and return ok...

Hi all, for the past few months have had a problem with my boiler (Suprima 50). Original problem was boiler would lockout when ever it felt like it but would reset. It appeared that the 3 way valve was not working have now changed that which has improved the system but boiler still locked...