Can I replace my Trane thermostat with Nest?

[Huggins]

 

[CoolingWizard]

OK it looks like you might have a heat pump base system with auxiliary heating. Best way to compare compatibility is to use the NASA compatibility checker. Your wires in use appear to be R With a jumper to RC, Y, O, G, W1, W2 and C. The wire on B is your C wire. The only odd thing is there is a black wire connected to X2 and that I’m not sure what it does or where it is controlling.

Ken, The AC Cooling Wizard

[Huggins]

Thank Ken!! While I know what you said makes perfect sense to most, it’s so foreign to me. I don’t even know where to go from here. I tried looking up NASA compatibility checker for thermostat and it brought me back to your response to my original question. I’m beginning to think my Trane thermostat is not compatible with Nest. 
Thanks again for taking the time in responding. I appreciate it. 

[EdwardT]

Hi folks,

@CoolingWizard, we always appreciate the help!

@Huggins, I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further.

Thanks,

Edward

[EdwardT]

Hi Huggins,

It's me again. I wanted to check back in to see if you have other questions and concerns. Feel free to let me know if you do. 

Thanks,

Edward

[EdwardT]

Hi Huggins,

I'm just checking in to make sure that you've seen our response. Please let us know if you have any other questions or concerns as I will be locking this in 24 hours.

Thanks,

Edward

[Huggins]

Hi @EdwardT thank you for checking in on me. I think I’m good for now. I have been traveling for work and haven’t been able to do the compatibility checker as @CoolingWizard  suggested but will do it when I get back. Thanks again for all your help.

[Markjosephp]

Hello there,

Sounds great! Thanks for getting back to us, @Huggins. It looks like we have come to a solution, so I'm going to lock this thread in 24 hours. If you have any other concerns or questions, please feel free to create a new thread.

Regards,

Mark

[EdwardT]

Hi folks,

@CoolingWizard, thanks for the help!

@Huggins, how's it going with your Nest Thermostat? Still need our help?

Thanks,

Edward

[Huggins]

Hi @EdwardT I’m thinking my old thermostat is not compatible with Nest, unfortunately. Thanks for checking in on me. I guess I should have done my research before getting the Nest thermostat. 

[CoolingWizard]

Huggins, you Trane is a standard HVAC control system and the Nest Learning Thermostat is fully compatible with your system. I am sorry about the “NASA” compatibility checker, the apple autocorrect changed NEST to NASA.  Argggg.. the Google Store has a Nest compatibility checker. 

Ken, The AC Cooling Wizard 

[Huggins]

Ahh, that makes more sense. I should’ve put two and two together. My mistake. Thank you @CoolingWizard I’ll check the compatibility checker. Wish me luck! 

[CoolingWizard]

Something you need to understand with the compatibility checker and your current thermostat is that the X2 wire is your emergency heat, so enter it as an E to the Nest Compatibility checker 

Ken