White Rodgers 1F97-71 - Manual (Page 34)

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4. What happens if the electricity goes off or
is manually shut off?
If you have not installed 3 "AA" alkaline batter-
ies, the display will go blank and the program
will be lost in approximately one minute. When
electricity is restored, the clock will reset itself
to 12:00 PM (noon) and the thermostat will
maintain a heating temperature of 64
°
F and a
cooling temperature of 82
°
F until you reenter
your program. Setpoint temperature will not
be displayed.
If fresh "AA" Energizer ® alkaline batteries are
installed, the program will be maintained for
about one year with no 24vAC power present
to the thermostat. See OPERATING YOUR
THERMOSTAT.
5. Why can’t I program the thermostat in the
AUTO mode?
The thermostat can only be programmed in
the HEAT and COOL modes. See PRO-
GRAMMING YOUR THERMOSTAT.
6. Why is the fan running constantly, regard-
less of system operation?
You have programmed the fan to run continu-
ously during this program period. To override
the programmed fan, press FAN
SWITCH
until FAN
AUTO is displayed. To change the program-
ming, see PROGRAMMING YOUR THER-
MOSTAT.
7. What can cause the thermostat display to
freeze or go blank?
A completely blank display may indicate that
power has been lost to the thermostat and the
backup battery is also dead. However, if there
is power to the thermostat and the display is
blank or frozen, static discharge is probably
the cause.