Thanks for the help. I was just asking as the test voltages for the cylinder stat and programmer terminals seemed odd to me.
I was kind of hoping it wasn't the boiler.
And....You were the one that brought up the garden gate!
Sorry for being comprehensive - I've seen too many forum posts where the originator is shot down for not saying enough... As in - I haven't told you the Boiler!
It's a Stelrad Ideal Elan.
Yes, I too thought it might be the boiler - but thought I'd post and ask rather than assuming. I may...
Sorry – this is a long post.
I replaced a very old and failing Sunvic timer (I think an MP2) a few months ago using a Drayton LP722 Programmer.
At the same time I replaced the capacitors in the share valve in the system – a Sunvic Unishare 3-Port MoMo motorised valve, as in this webpage ...