Existing Trane thermostat compatibility with Nest

[PrometheanTitan]

Just want to know if the Nest is compatible with my existing Trane wiring?

[Houptee]

Yes but look at the cable is there a extra wire not used? You can use it for a C wire but have to connect it to C at the furnace also.

[Patrick_Caezza]

Depending on which of the Nest thermostat's you are going to. If you are using the Google Nest Thermostat you are also going to want to use the Google Nest Power Connector so you have a C wire. The older two thermostats will work without one, but I always recommend installing one anyway just to insure you don't have any power problems down the road.

[aatienza]

Hey PrometheanTitan,

Checking in — we hope you've got the answer you're looking for. Let us know if you have more questions in mind.
 

I appreciate the help, Houptee and Patrick_Caezza.

Thanks,

Archie

[aatienza]

Hey there,

I just wanted to follow up to see if you still need our help. Please let us know as we would be happy to answer any questions you may have. 
 

Thanks,

Archie

[aatienza]

Hello there,

Just checking in to make sure that you've seen our responses. Please let me know if you have other questions or concerns as I will be locking this in 24 hours if I won't hear back from you again. Feel free to start a new thread and we'll be happy to help.
 

Thanks,

Archie