Hi
I am replacing a 20 year old honeywell room stat with a sunvic TLX7501.
The honywell is wired as follows
Red = 1 this is live 240v
Blue = 2
Yellow = 3
I did a staight swap on the wires ie 1 to 1, 2 to 2, etc but it dosen't work we set the new stat to 35c to call for...