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press
RUN
PRGM
to start the normal program
function. See PROGRAMMING YOUR
THERMOSTAT.
4. What happens if the electricity goes off
or is manually shut off?
If you have not installed 3 “AA” alkaline
batteries, 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 tem-
perature 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 main-
tained for about one year with no 24 VAC
power present to the thermostat. See OP-
ERATING YOUR THERMOSTAT.
5. Why is the fan running constantly, re-
gardless of system operation?
You have programmed the fan to run con-
tinuously during this program period. To
override the programmed fan, press
FAN
ON - AUTO
until FAN AUTO is displayed. To change
the programming, see PROGRAMMING
YOUR THERMOSTAT.
6. 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 batteries are also dead.
However, if there is power to the thermostat