I agree with John but you have moved the goalposts again.
Now you do have a wiring centre in the cupboard to which the MV is correctly connected.
Also, you are now only changing the actuator.
Two wires on the MV.
How/why have you even noticed the thermostat wiring?
I think you are trying it on but not succeeding.
I don't believe there are millions of homes wired as you say.
Now you do have a wiring centre in the cupboard to which the MV is correctly connected.
Also, you are now only changing the actuator.
Two wires on the MV.
How/why have you even noticed the thermostat wiring?
I think you are trying it on but not succeeding.
I don't believe there are millions of homes wired as you say.