Final update. It turns out the RA adapter did work. It need to be completely flush with valve. The adapter was a bit tight, but with a tool (penknife) I managed to get it to attach so there was no space at the bottom. The TRVs are working as expected. Hope this helps someone in the future.
I have been trying to install some newly purchased Smart TRV. But I can't seem to work out which adapter is the correct on. I had no issues removing the current TRV.
When removed it looks like this:
I have the adapters listed in the instructions:
If anyone could help me either a) work out...
Afternoon all, I think some of the posters were correct. It was a dead PCB board. Rather fortunately, I managed to get it repaired the same day. But lesson learned there.
Unfortunately, I have not been able to get the Nest working since. I waited until after New Year to try again. Wired it up...
Good afternoon!
I did have a browse though other threads to see if I could find an answer, but unfortunately not.
I have followed the instructions as far as I could, but I cannot get the boiler to power back on. I've checked fuse/trip and nothing has gone. When I first wired it, I put the...