18
Turn thermostat over, insert
fresh AA alkaline batteries,
then reinstall thermostat.
Battery replacement
M28420
Batteries are optional (to provide
backup power) if your thermostat
was wired to run on AC power when
installed.
Install fresh batteries immediately
when the
LO BATT
warning begins
flashing. The warning flashes about
30 days before batteries are depleted.
Even if the warning does not appear,
you should replace batteries once a
year, or before leaving home for more
than a month.
Grasp thermostat and pull to
remove from wallplate
UP
