Honeywell T8131A Owner's Manual page 10

indicator eventually stops flashing. bAt Lo stays
on without flashing to indicate the thermostat and
heating/cooling system have stopped working
and the batteries are almost completely dead.
After the batteries are completely dead, the bAt
Lo indicator disappears, leaving a completely
blank display.
Press down on the left ends of
batteries to remove them. If you
insert the new batteries within
20 to 30 seconds of removing
the old ones, you do not need
to reprogram the thermostat.
However, if the display is blank,
the batteries are dead or
incorrectly installed and you
need to reprogram. See
pages 16 to 19 to reprogram.
IMPORTANT
Although the thermostat has a low
battery indicator, replace the batteries
once a year to prevent the thermostat
and heating/cooling system from
shutting down due to lack of battery
power.
INSTALL TWO AA ALKALINE
BATTERIES AS SHOWN
10
As a precaution, when
leaving home for longer
than a month, change the
batteries before you leave
to prevent the system
from shutting down due to
lack of battery power.
M1713
69-0887—1