There are 8 wires going to my thermostat. does anyone know what color wires operate what components.?

Question

it's a trane heat pump.... black wire is on x2--orange is on o--green wire is on g-- yellow wire is on y--brown wire is on t--red wire is on r---white wire is on w--blue wire is on b.

Answer 1

the usual # is 4. do you have an old unused set of wires there?

Answer 2

X2 is emer. heat, o is reversing valve, g is indoor fan motor, y is outside cooling, t is anticipator reset on outside unit, r is 24 volt, w is heat, b is commom

Answer 3

B is common,R is hot,O is c/o switch ,G is indoor blower,X2 is emergency heat,Y is compressor,W is aux.heat ,F is just a malfunction indicator

Answer 4

x2 is common