Step-by-step Instructions
1. Switch off
power to your
system
(You may have
already
completed this
step.)
t’s important to protect your thermostat and your system. Turn off the power to
our system and thermostat before exposing any wiring.
Your HVAC system can have multiple breakers so make sure to turn them all off
before moving on. Check that the power to your system is off by changing the
temperature on your thermostat by at least 5 degrees
f it’s winter, turn up the temperature to turn on heating.
f it’s summer and you have system cooling, turn down the temperature to
activate your central air conditioning.
Wait at least 5 minutes to see if your system turns on (you’ll need to wait
because many systems have a built-in delay).
You can listen for your system to turn on, or put your hand near a vent to feel if
there’s warm or cool air coming through. For more detailed instructions, see the
article linked below.
How to turn the power off to my heating and cooling system
2 Remove your
thermostat's
cover and take a
picture
(You may have
already
completed this
step.)
Once you’re sure the power is off, remove your thermostat’s cover.
Some thermostat covers pop off, while others need to be unscrewed. If you haven’t
already, now’s a good time to take a picture of your current wiring
3. Get a wiring
diagram from the
app
(You may have
already
completed
this step.)
To get a custom wiring diagram for installation, simply follow Nest app’s
thermostat installation instructions