I agree it’s a mess but that’s what I’ve got to sort out, presumably its the wiring from the boiler to the timer unit that needs checking and changing, I imagine that the colours mean nothing as it all works perfectly and has done for several years. Is it best to get a plumber with electrical...
I am replacing my current system with a Hive 2 but am unsure of the wiring sequence if anyone can help it would be much appreciated.
I have a Worcester Bosch Greenstar Ri boiler and a separate hot water tank (gravity fed), I have 4 wires one of which is the earth (I think) the L & N I have...