12-23-2021 12:30 PM
Can you please help if my system compatible for nest thermostat? Thanks
12-23-2021 01:41 PM
Following. Exact same wiring here. If anyone responds, you'd be helping 2 people at once !😁 TIA
12-23-2021 01:51 PM
Wires are
W1,W2, R, Y, G, B
Thanks
12-23-2021 02:13 PM
FWIW, Google Chat Help is not helping and suggests a "Nest Pro". I told them I'm fairly comfortable with any type of wiring, but I was shut down 🙂
12-23-2021 07:55 PM
And if it helps with understanding...
W1 - Stage 1 heat
W2 - Stage 2 heat
Y - A/C
G - Fan Continuous
R - Transformer power high - ~24vac
B or C - Transformer Common
12-23-2021 07:48 PM
Your wiring looks identical to my Trane gas furnace/AC system. (Two-stage gas furnace with A/C.)
What my thermostat showed as 'B' is actually referred to as 'C' in most other systems.
In order to get the Nest system to be 'happy' during it's setup, I connected the wire from 'B' on my old thermostat to the 'C' connection on the Nest. The other terminals matched up directly. During setup the Nest asks you to identify the wires you used and I specified 'C' instead of 'B'. Everything works perfectly.
12-23-2021 09:53 PM
Thanks. Yes, American Standard gas pack/AC (same company, should be similar units )
That checks out with other instruction videos on YouTube ( My B is Common (C) to the Nest Unit)
Thanks for your help!!
12-24-2021 06:39 AM
How about W2? I don't see it where it goes on the nest thermostat!!
12-25-2021 07:42 PM
Actually, good point. I installed a Nest last year and it had a dedicated W1 & W2. Assumed new one did as well. Sure enough, I opened my new one and looked closer....and just one W terminal 😐
12-25-2021 08:04 PM
I guess it depends on the Nest model that you have. I have the Learning 3rd Gen and it has 10 terminals to support the following.
12-26-2021 09:40 AM
Yes, my prior Nest was a Learning model.
My new one was free via my local power provider. Appears to be the non-learning model and that ( for whatever reason) seems to have fewer terminals. Seems like this is headed toward an actual phone call w/ Nest support (ha...maybe next year?) Appreciate all the help. Surely there are others w/ this issue and maybe this thread becomes a consolidated place to navigate this issue.
12-26-2021 10:32 AM
Ah - Maybe you could check with your power provider to see if the Learning 3G is available for extra cost.
When I got mine this spring, ComEd (Illinois) was offering a $100 rebate on any programmable t-stat, including the Nests. If ordered online through Home Depot, they applied the rebate instantly right at checkout. So the original basic model was free, but I chose the Learning 3G and paid $99 for it. Now I'm really glad I did.