Install your ecobee3 with confidence.
Follow along our step-by-step guide and videos to complete the self-installation.
Check compatibility
First Things First
Here’s what you’ll find in the box.
Also included
Room sensor stand
Screws and drywall plugs
Double-sided adhesives
Wire labels
Installation guide
Quick start guide
Tools you'll need
Required
Drill (3/16” drill bit)
Phillips screwdriver
Optional
Hammer
Pencil
Wire stripper
Installing your ecobee is as easy as downloading this app.
How to install your ecobee3.
Start Here
Remove your thermostat
The steps in this video will help you decide which install guide you’ll use to complete the installation.
Guide 1
Install with a C wire
If you have a C wire, it will power your ecobee. You won’t need the PEK included in the box.
Guide 2
Install without a C wire
If you don’t have a C wire, you’ll need to use the PEK included to reliably power your ecobee.
How to set up your ecobee
Guides and manuals
Helpful Resources
Meet your ecobee3 lite.
- System Mode shows your current ecobee setting
- Humidity shows the indoor humidity in your home
- Indoor Temperature
- Menu controls your system, schedule and more
- Temperature slider controls your preferred temperature
- Remote Sensor reads the temperature and occupancy in the rooms
- Quick Changes allows you to switch from Home and Away settings
- Weather shows local weather and weekly forecast
Troubleshooting
If your ecobee doesn’t turn on, please try these steps.
Check that all wires are properly inserted into the terminal blocks at the thermostat. Tug
on the wires to ensure they are not loose.
Some HVAC equipment has a safety switch that cuts off power to the equipment if the
equipment cover panel is not closed properly. Please ensure the cover panel of the equipment
is closed properly.
If you installed the PEK, ensure R wire is connected to Rc only and G wire is inserted
properly into the terminal.
If you have a multi-meter, please check the AC voltage between Rc and C or Rh and C and
ensure it is 24V.
