Hello,

I would like some help with this installation, I have a white, red, green and blue wire coming out of the wall. My question is where do I put the blue wire?
Thanks

To which terminal on the furnace is each wire connected?

I have a 6350 thermostat also. I have a gray wire that was hooked up to X1 terminal on a white and rodgers mercury thermostat. Where does the gray wire go?

Answer the question in post #2, by Grady and we should be able to tell you exactly where to hook all the wires at the t-stat.