C wire

[kgma]

Hello,

I am looking into getting a Nest thermostat, I looked at my wiring and I don't have a C wire connection, will that matter?

[MrLou]

Check behind your wall, I had a similar setup to yours and was able to locate an old blue C-wire buried beneath the dry wall, just connected it and traced it back to the furnace control board and then connected it to the C terminal there.

[mikev552]

Yes, definitely see if you have an unused wire back there....and use it at the C terminal...check other end at furnace as well.. Nest will not work properly without the C wire, even though Google says it will....

[Patrick_Caezza]

Nest thermostats are designed to work without a common ("C") wire in most homes. During installation, a small number of customers may find that the Nest Thermostat does not receive sufficient power. The Nest Power Connector or a C wire may be necessary. See g.co/nest/cwire for details.

[MelbaDT]

Hey folks, 

Appreciate all your responses, Patrick_Caezza, mikev552, and MrLou. 

kgma, I'm chiming in to ensure that you're all good here. Have you seen all of the responses on your question above? Hope you've got the answer you're looking for. 

Best, 

Melba

[MelbaDT]

Hey kgma, 

Checking back in should you still need our help here. Let us know by replying to the thread. 

Best, 

Melba

[MelbaDT]

Hi, 

We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community.

Best, 

Melba