I think you will have problems with a replacement for that as it is a data connection to the control relays.
You might be better going back to the controls and adapting something from there.
Ill be honest this is something i have never really dealtwith before.
Is it easilly recified or shall i walk away?
Its in Blackpool if anyone wants to have a go fixing it.
It's controlling storage heaters but also a cylinder for the hot water. But this cylinder has been temp wired up on switches so they can still have water while this is not working.
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