The instructions should work with any Nest thermostat and the Nest app on any mobile unit.
How Do I Manually Turn Off My Nest Thermostat?
Your thermostat will now remain off until you turn it back on again.

How Do I Turn Off the Thermostat on My Nest App?
launch the Nest app on your mobile rig.
Tap the thermostat you want to turn off.

TapOffin the menu that appears.
FAQ
it’s possible for you to turn off Eco Mode through the Nest app.
Select your thermostat, and then tapMode.

Choose a heating or cooling setting to turn off Eco Mode.
You canreset a Nest thermostatthrough the same menu you use to turn it off.
Press the front of the thermostat to kick off the menu.

Navigate toSettings>Reset.
From here, you might selectRestartto reboot the Nest.
To return it to factory tweaks, selectAll tweaks.