I am in the process of installing a new thermostat that requires a c wire. I checked my thermostat to see if it has a c wire running to it and it does not. After doing lots of googling and watching youtube video I think I know what to do but would like somedody that knows to verify it is correct before I attempt something like this.
I noticed where the wires run to the thermostat it has a extra wire (orange) not in use.
I then checked where the furnace to verify the same wire is not attached to nothing and it is not.
If I am looking at it correctly I can connect the extra wire orange to the to the orange wire from the furnace which is not connect to anything (which if I am reading it right is the c wire) This would work correct? I am new at this and do not want to mess anything up.
Best Answer
It's a little unclear exactly what you're asking, but it sounds like you're on the right track. If the orange wire is unused (unconnected at both ends), you can use it as a
C
wire. Connect the one end to the thermostat'sC
terminal. Then connect the other end to theC
terminal in the furnace.If the furnace does not have a
C
terminal, please see this answer for help figuring out where to connect the wire.According to the schematic, the grey wire should be
C
.