Which Google Nest is compatible with my system?

[PWheelans]

I have 5 wires (Rh, Rc, G, Y, W), dual transformer system as furnace and AC are separate. Can someone confirm which Google Nest is compatible with my system? Photo is linked below.

Photo of current thermostat: https://photos.app.goo.gl/b1r1U7Kq6k4MBvNd8 

Another question - will I require (or be best advised) to have a C wire? My current setup does not have one.

[Patrick_Caezza]

@PWheelans 

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

Try this wiring,

Read - Rc to Rc

Black - Rh to Rh

Green - G to G

Orange - Y to Y1

White - W to W1

I always strongly recommend that you install a C wire. Check and see if there is a spare wire behind the thermostat and use it to create a C wire. If there are no spare wires, use the Google Nest Power Connector to create one.

[aatienza]

Hey PWheelans,

I'd like to jump in here and check if you've seen Patrick_Caezza's response. Let us know if you need more help by replying to this thread.
 

Thanks,

Archie

[PWheelans]

This worked! Thanks so much for your advice.

[Markjosephp]

Hello PWheelans,

Awesome! I'm glad to hear you were able to successfully install it. It looks like we can consider this one complete, so I will lock the thread within 24 hours unless we can help out with anything else.

Regards,

Mark

[PWheelans]

Hi guys,

Thanks for the info. I have seen Patrick's response and we are going to attempt the install this week based on his advice. Will report back.

Thanks,
Peter

[aatienza]

Hey PWheelans,

Sounds like a plan!

Thanks,
Archie