White Rodgers 1F94W-71 - Manual (Page 6)

6
PARTS OF THE THERMOSTAT
The Back of The Thermostat Body
Turn the thermostat body over. On the back are
the 9 volt Energizer
® alkaline battery and the
option switches.
1.
The 9 volt Energizer ® alkaline battery pro-
vides power to the thermostat when the 24
VAC power is interrupted (for example, when
you remove the thermostat from the wall for
programming). A fresh battery will maintain
the stored program for approximately a week.
If power loss is long enough for the program
to be lost, the thermostat will automatically
return to the factory programmed tempera-
tures (64
°
F heating and 82
°
F cooling) when
power is restored. You must reprogram the
thermostat if this happens.
If the word BATTERY is flashing in the
display window, the battery is low and should
be replaced with a fresh 9 volt Energizer®
alkaline battery. The battery will provide
power for all functions except the display
light, which works only on 24 VAC power.
BACK OF THERMOSTAT BODY
Option switches 9-pin connector
4-pin connector Battery
W18