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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...

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...