Compatible for two wires only.

[Gbm149]

My thermostat which is a honeywell have two wires

Red Wire: R ( with jumper R to RC)

Black Wire : W

Can I use the Google Nest 2020 on two wires without using C wire or a Google Nest power adaptor?

Google nest 2020 have only W and R

Google Nest 3rd Gen have W , RC and RH

Thanks

GBM149 

[RnAElec]

Nest E...

allows for this, battery operated round heatlink

[Houptee]

You do not use any jumpers on the Nest or any of the new smart Tstats.

You would use R and W and C if you can run a new thermostat wire to the system this is the best way to get a C wire. You can buy the thermostat cable at Home depot or Lowes etc use 5 conductor cable.

Or use a power adapter if you dont want to run the new cable.

The Nest Learning might work without a C wire but no guarantee. 

All the new smart thermostats work much better with an actual C wire connected.

[EdwardT]

Hi folks,

@Houptee and RnAElec, thanks for the help!

@Gbm149, I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further.

Thanks,

Edward

[EdwardT]

Hi Gbm149, 

It's me again. I wanted to check back in to see if you have other questions and concerns. Feel free to let me know if you do.

Thanks,

Edward

[EmersonB]

Hey everyone,

@Gbm149 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.

I appreciate the help, Edward, RnAElec and Houptee.

Regards,
Emerson