I am trying to add a nest thermostat. But their support desk is not able to answer a simple question properly and keep asking me to buy a nest pro service. Right now my nest is connected without a c wire (basis their advise) and is working ok. But I would hate to not use a C wire that I feel probably is already existing.
I do see a blue coiled wire on either side tucked in (either side as in at the old thermostat and the furnace). But the wire is NOT connected currently. There is an additional red wire that’s on the “comm” of the furnace. I asked them if I can plug this blue wire which is currently running unconnected from my thermostat to the furnace and connect to both end of the nest and the furnace comm. which would mean though that the furnace comm will have two wires (there is already a red wire in the comm of the furnace and then there would be this new blue one) and the Y at furnace also has two already connected wires: one yellow and one white. Can one of you good Samaritan’s see from the connections if it’s ok to connect the blue wire currently unconnected to the nest and to the furnace and is it ok to have two wires going into the comm at furnace.
By the way what are all the other wires If anyone can throw light on the same.