Wiring

[brianztrapp]

I have 7 wires total, R, O/B, Y, G, C Y2 and Aux... where do I land the second Y if Y2 is already installed?

[MelbaDT]

Hey brianztrapp, 

Thanks for reaching out. 

Could you share a clear photo of your current thermostat wires showing the terminal labels? Also, what system do you have and what type of Nest thermostat are you trying to install?

Best, 

Melba

[MelbaDT]

Hey there, 

Checking back in — still need our help? Let us know  by replying to this thread. 

Best, 

Melba

[brianztrapp]

Appreciated. I think the two wires were wired up, but not physically connected to anything on the unit (the Y2 wire when connected to Y on Nest, didn't provide any cooling). The thermostat is working fine. I suspect the same for the AUX/E wire that was connected on my old thermostat. I have the newest Nest unit (mirror finish and only 6 connection points)

[EdwardT]

Hi brianztrapp,

Thanks for the response. The Y2 wire is for second stage cooling. Based on your available wires, it looks like you have a heat pump. You can put your AUX to the W terminal and just make sure that you program it as Aux heat during setup.

Thanks,

Edward

[EdwardT]

Hi brianztrapp,

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 brianztrapp,

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

[brianztrapp]

I did, thank you. I actually used to have a Y2, Aux/E, R, O/B, Y, G and C wire on my old thermostat. I connected the Aux/E up as you mentioned, but not sure if I have Aux or E for auxiliary heating... guess I'll find out come winter!

Appreciate the follow-up.

[EdwardT]

Hi brianztrapp,

Thanks for the response! Please observe it for now and let us know if anything comes up.

Thanks,

Edward

[EdwardT]

Hi brianztrapp,

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

[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