6
As the batteries are running low, a “bAt Lo” in-
dicator will flash for 1-2 months before batteries
run out completely. Replace the batteries as
soon as possible after the indicator starts
flashing. If you do not replace the batteries
sometime during the flashing “bAt Lo” indicator,
the indicator will eventually stop flashing. “bAt Lo”
will stay on without flashing to indicate the
thermostat and heating/cooling system have
stopped working when the batteries are almost
completely dead.
After the batteries are completely dead, the
“bAt Lo” indicator will disappear, leaving a
completely blank display.
Press down on left ends of batteries to remove.
If you insert the new batteries within 20-30
7
INSTALL TWO AA ALKALINE
BATTERIES AS SHOWN
M1713
STEP 3
M1719B
REMOVING
BATTERY
DOOR
Install The Batteries
IMPORTANT
Batteries must be installed for programming
and operation of the thermostat and heating/
cooling system.
■
■
Purchase two AA alkaline batteries; non-
alkaline batteries will not last as long. We recom-
mend Energizer batteries.
■
■
Make sure the thermostat is set in OFF position.
■
■
Use a coin to remove battery door.
■
■
Install the fresh batteries as shown,
making sure positive and negative terminals are
oriented correctly.
■
■
Replace battery door.
seconds of removing the old ones, you will not
have to reprogram the thermostat. However, if
the display is blank, the batteries are dead or
incorrectly installed. In this case, you will have to
reprogram. See pages 12-13 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.
When leaving home for longer than a month,
as a precaution, change batteries before you
leave to prevent system from shutting down due
to lack of battery power.
