Do I need to connect usb also or just T1 & t2

[Safeabz]

Hi i have this nest 2nd gen thermostat, in installation when putting on the wall it doesn't say anything about having micro usb to power just has t1 & t2 wires  from nest transmitter box by the boiler through the wall and connect to. Nest thermostat back plate. 

Is this correct or do I need to run a micro usb cable from a plug somewhere also to power the thermostat which will be. Difficult 

On the transmitter t1 and t2 cover also says 12v 

[David_K]

Nest thermostat’s internal battery is usually charged by your system sending power over the wires connected to it. If there’s a problem and your thermostat can’t get enough power, that's when you can use the USB port to quickly charge it but that's only really a temporary solution. If that keeps happening, you may need to connect a common wire (C wire) or power accessory, like the Nest Power Connector, to make your system compatible.

[Safeabz]

Can I remove my existing transmitter and replace it with google nest transmitter 

[David_K]

It sounds like it would probably help for you to use the compatibility checker:

Thermostat Compatibility - Google Store

[EdwardT]

Hi folks,

@David_K, thanks for the help!

@Safeabz, how's it going with your Nest Thermostat? Still need our help?

Thanks,

Edward

[EdwardT]

Hey Safeabz, 

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

[EdwardT]

Hi Safeabz, 

I'm just checking in to make sure that you've seen our response. Please let us know if you have any other questions or concerns as I will be locking this in 24 hours.
 

Thanks,

Edward