Hi,
Sorry for the late reply but it looks like the cable coming from the thermostat has 4 wires coming out of it - red, blue, yellow (which is what is on the thermostat) and also an earth.
The earth goes into a junction box at the rear of the ST9400C.
The red goes into position 4.
The yellow...
There is a white cable right at the back (photo attached) this has 4 wires coming out of it - red, blue, yellow (which is what is on the thermostat) and also an earth.
There is a cable coming from the boiler with 5 wires.
Then there are a further 2 cables coming from the back box - they both...
Hi, thanks for the quick reply.
In all honesty, I plan to change the boiler to a combi or potentially a heat pump in the near future so the first option might be the best suggestion.
In relation to the wires for the second option, is there any other way to confirm this other than using a wire...
Hi,
I am looking for some advice regarding replacing my Honeywell ST9400C with a hive hot water and heating system.
I looked online, it seemed simple enough, ordered myself a hive but today I looked a bit closer at the wiring and I'm a little confused as there are more wires than I...