How To Remove Thermostat Battery. Once removed, turn the thermostat over and insert 2 fresh aa batteries , and then reinstall the thermostat on the wallplate. Just pull them down to detach the battery.
To remove and replace the batteries, pull at the bottom of the thermostat to remove it from the wallplate. First, turn off your power to the ecobee connected furnace. Remove the bottom cover on your thermostat, the white portion below the screen, by grasping on each side and pulling forward.
Reattach the thermostat to the wall plate.
Most thermostats have a low battery indicator that will be displayed on the led screen that displays the temperature. When changing the battery, consult the owner’s manual for your model of thermostat. Set the thermostat to an off position; The process varies depending on the model you use.