Battery Replacement - Honeywell RTH5100B Operating Manual

Battery replacement

About your new thermostat
Press down and pull to remove.
Replace Batt
Insert fresh AAA alkaline
batteries, then reinstall
battery holder.
Install fresh batteries immediately
when the REPLACE BATT warning
begins flashing. The warning flash-
es about two months before the
batteries are depleted.
Even if the warning does not
appear, you should replace batter-
ies once a year, or before leaving
M28307
home for more than a month.
Batteries provide backup power to
the display during power interrup-
tions. All settings are permanently
stored in memory, and do not
require battery power.
M28308
11
RTH5100B
69-2330EFS—01