Owner's Manual
Page 11
... REPLACE BATT warning begins flashing. All settings are depleted. The warning flashes about two months before leaving home for backup power) if your thermostat was wired to run on AC power when installed. Batteries provide backup power to remove thermostat from wallplate. Turn thermostat over, insert fresh AA alkaline batteries, then...
... REPLACE BATT warning begins flashing. All settings are depleted. The warning flashes about two months before leaving home for backup power) if your thermostat was wired to run on AC power when installed. Batteries provide backup power to remove thermostat from wallplate. Turn thermostat over, insert fresh AA alkaline batteries, then...