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Replacing the Batteries (select models)
• Install the batteries in the
wallplate so the positive
terminals all point up
(see illustration).
• If the thermostat is
already mounted on the
wall, remove the thermo-
stat by placing your
thumb between the
thermostat and wallplate
and pulling the thermostat
up and away as shown.
When the batteries are
running low, a REPL BAT
message flashes for one to
two months before the
batteries run out completely.
Replace the batteries as soon
as possible once the message
flashes.
If you insert new batteries within 20 to 30 seconds of removing
the old batteries, the system retains the current time and day. If
the display is blank, the batteries are dead or installed incor-
rectly. You must reset the time and day. Refer to Set the Clock
for instructions.
As a precaution when leaving home for longer than
a month, change batteries before leaving to
prevent the system from shutting down due to lack
of power. Always use fresh alkaline batteries.
Nonalkaline batteries do not last as long. They also
can leak, causing damage to the thermostat and the wall
surface.
WALLPLATE
B
R
RC
O
W
INSTALL 3 AA ALKALINE BATTERIES
AS SHOWN, POSITIVE (+) TERMINALS
TOWARD TOP.
19
Y
G
M10622
M16424
69-1400–1
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