Remove the circular backing from the back of the sensor.
Remove the battery from the battery slot.
Gently lift the prongs in the middle of the battery slot with your index fingernail.
Place the battery back into the battery slot with the positive side facing down for 30 seconds.
Remove the battery and place the battery back in with the positive side facing up.
Place the backing back onto the battery slot.
3. Re-pair a Sensor to Your Thermostat
Your ecobee will notify you that it has found a Room Sensor. Tap Yes to proceed with pairing.
Your Sensor will start to pair and a four digit code will appear on your thermostat.
Select a name for your Sensor, then tap Next.
Select when your Sensor will be active, then Tap Next.
Enable or Disable the Smart Home/Away function by tapping the desired setting.
The Smart Home/Away function uses all the sensors connected to your thermostat to detect if anyone is currently home. If, according to your normal schedule, your thermostat believes you should be “home,†but your sensors detect that your home is actually unoccupied, your ecobee thermostat will make adjustments so you aren't unnecessarily heating or cooling an empty home.
Enable or Disable the Follow Me function by tapping the desired setting.
The Follow Me function uses all the sensors connected to your thermostat to intelligently make heating and cooling decisions for the rooms of your home that your sensors detect activity in. If the Follow Me function is disabled, your ecobee thermostat will make heating and cooling decisions based on the average temperatures measured between the sensors in your home.