Hi - Can I replace Honeywell T6360B thermostat with Honeywell DT90E? How do I wire it? T6360B is wired as follows:
earth - uncovered wire
2 - grey
3 - black
4 - no wire
1 - brown
DT90E has A, B and C only.
What goes where? what do I do with spare wires?
Or is this a no no...