I recently moved into a house with a gravity fed CH system, the Baxi back boiler is 4-5 years old but the heating system looks much older, each rad (except the one in the bathroom) has a thermostatic valve and there is one room stat in the hall.
As everyone knows, with this type of system it is not possible to run the heating without the hot water.
My problem is that I have been running the heating on "constant" over the weekend and as a result the hot water is scalding hot to the point where steam and water have been jetting into the header tank - my loft sounds like the local branch of Starbucks and the wooshing and banging is not only getting on my wick but I'm sure it's not doing the system any good.
I recently replaced the ballcock on the header tank as this kept overflowing, it still overflows so I guess it's the hot water cylinder that's up the chute! and I will have to replace this.
At the same time I am considering modifying the system so that the heating can be run independant of the hot water and maybe zoning the upstairs and downstairs.
I would like to ask if anyone has anyone undertaken this (or a similar)job and if they have any tips/tricks/do's dont's/information on parts/suppliers etc that may help me decide the best way to do this.
Thanks in advance,
Kev