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Hi All, Just a quickie.....need to rewire ancient H'well 6060 B room stat to WB 12 wiring centre but unsure as to terminal layout of stat. At present, terminals are numbered 2 1 4 3 from top to bottom. Wires at present are (3 core + earth) earth----2,Red----1,Blue----4, Yellow----3, old...

Hi Softus, Again, thanks for your replies.The original valve is definitely fitted into 28mm (or possibly its imperial equivalent which you say is 1"). as this is the size of the pipes (4 I think but without being able to check...!)from the back of the Potterton. I remember after...

Hi again Softus, Many thanks again for your considered help with this, I really do appreciate the time and effort that you've put in....I notice you were up late when you posted as well! As you suggest , it looks more and more like the head unit on the motorised valve at...

Hi Softus, Thanks for that. The more research I do into this ,the more I suspect the motorised part of the valve. Yes it looks like a V4043 is the likely candidate though a couple of issues come to mind. I hope I would be swapping like with like (or as near as...

Dear Tony, Thanks for your (unhelpful) comment. Yes, on the surface it does look like a " false economy" but as you don't know any of the circumstances leading up to it, I assure you it was a sensible decision at the time. In retrospect, perhaps not. If you or anyone else have...

Hi All, and happy new year! My aged mother's CH system is having problems. Like her, the system is pretty ancient and not functioning too well! It consists of - Potterton C70/21 BE or SB a floor standing gas boiler...