Wiring Confusion - Standard Nest

[dmwc]

I'm trying to install a Nest thermostat (regular version, not the learning version) to replace a non-smart Honeywell. My heating system has a heat pump plus an electric furnace for emergency heat. Here's the existing thermostat wiring.

Because of the E and AUX wires, I'm not really sure how to wire the standard Nest thermostat, or even if it will work at all. If the standard Nest will work, how should it be wired? If it is not compatible, would the Learning version work?

[David_K]

Nest Thermostat (2020) isn't compatible with dual fuel systems like this, but Nest Learning Thermostat is. Detailed information below and the compatibility checker you can confirm with.

Nest thermostat compatibility - Google Nest Help

Thermostat compatibility – Google Store

[zoeuvre]

Hi dmwc, 

Thanks for reaching out to us. I hope you've already gotten the answer you're looking for from the information that davidking has shared. Also, below is an image on how you should connect your thermostat wires to the Nest Learning Thermostat base. 

On the other hand, here's a guide for the installation and set-up of your Nest Learning Thermostat. 

Let us know if you still have questions or concerns, as we'll be willing to assist you more.

Thanks for your help, @David_K. 

Best,

Zoe

[zoeuvre]

Hello folks, 

I wanted to check and see if you managed to see the information has been shared. Please let me know if you have any questions from here. I would be happy to assist and make sure you are good to go.
 

Thanks,

Zoe

[zoeuvre]

Hi there, 

Just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know. 
 

Regards,

Zoe