how to set up nest if I have 7 wires?

[deweyroman]

I have a new google nest thermostat and my old one has seven wires. a black wire I don't know what to do with. Can someone guide mmy current setupe to install.

[laurentbourg]

Which Nest do you have, the Nest learning thermostat 3rd generation?

[Shedrickba]

I have the small round one with the mirror face.

[deweyroman]

it's the new one from google with the mirror front 

[laurentbourg]

I do not believe that one will work with your setup, which seems to be a heat pump with aux heat and emergency heat. 

[Shedrickba]

Ok, does nest have a model that will work ?

[Shedrickba]

Yes

[Patrick_Caezza]

Your current thermostat is only compatible with the Nest 3rd Gen Learning Thermostat.

I would suggest wiring it like this.

Red R to R

Orange O to OB

Blue C to C

Yellow Y1 to Y1

Black E/W1 to * - set as Emergency heat

Green G to G

White W2 to W2/AUX - set as AUX heat

[Scout]

Since OB * is one port, are you saying to connect the Orange and Black wires to that port?

[scgroger]

Do the black and orange go together in the OB* port? thanks

[scgroger]

I have seven wires. Do the orange and black go together in the ob* PORT? thanks

[Joe15]

what does Rc, mean? and what does RH mean on my nest 3rd Gen learning therostat

[Joe15]

the red wire to connect with R? my nest ha Rc, and RH! so witch one whould I connect the red wire to? Rc, or RH?

[ArchitectCorky]

You are still the only one on this thread who has good info but does it apply to the 3rd geb only or the one in question?

[Rc1962]

I have 7 wires and hooked it up as instructed from google chat people and now the heat does not work

[laurentbourg]

please upload a picture of the wiring on your old thermostat and also the Nest wiring plate

[Desertguy]

Hi. I have the same 7 wires. And my heat doesn't work.  I canot find a way to upload images  can you please email me.  So i can send you images and be sure i can get it correct.  My system is heat pump.  Thanks for your time

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[Desertguy]

I have the same problem.  We're you able to get the heat working?

[Desertguy]

I have the same problem.  We're you able to get the heat working?

[ibrady]

Nothing worse than a thread that never has the answer! 

[davidpollock929]

Why would Google/Nest not tell you how to fix this problem?  There is nothing in any instructions about what to do if you have 7 wires.

[ChrisWalkure]

Did you figure it out"?