Which Nest should I buy for these wires? I do not have a heat pump.

[Justj1976]

I have tried two different smart thermostats with no luck. I currently have an American Standard that came with my unit but the screen was cracked. I can't just buy a new one online because they are commercial only and my AC people want to charge me $199 for a diagnostic fee which is BS bc I already know I just need a new thermostat. So looking at the nests now and would like some help with wiring compatibility and just which one to buy. Thanks!

 

[aperezdeleon]

Hi Justj1976,

Thanks for reaching out to our community!

I'm glad to hear you're interested in getting a Nest thermostat. Nest thermostats are compatible with most conventional HVAC systems, and the wiring labels your previous thermostat has seem to indicate that a Nest Learning Thermostat might be the best option for you. From your photo, I'm able to make out the following wires:

• Blue wire in C
• The red wire in R
• White wire in W1
• Black wire in W2
• The green wire in G
• Yellow wire in Y1

I'm not able to make out what the orange wire is attached to. However, if it's attached to a connector labeled AUX or E, then a Nest Learning Thermostat is still compatible. Otherwise, feel free to keep me posted so we can take a closer look at it and determine the best course of action.
 

Regards,
Angel.