Owner's Manual
Page 12
... pull to remove Replace Battery Insert fresh AA alkaline batteries, then reinstall battery holder Batteries are optional (to provide backup power) if your thermostat was wired to the display during power interruptions.All other settings are depleted.
... pull to remove Replace Battery Insert fresh AA alkaline batteries, then reinstall battery holder Batteries are optional (to provide backup power) if your thermostat was wired to the display during power interruptions.All other settings are depleted.