White Rodgers 1F95W-80 - Manual (Page 38)

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about one minute if there is no battery
installed or if the installed battery is dead.
If you are changing the battery after seeing
a flashing BATTERY on the display, the
installed battery may be dead. If you re-
move the old battery and install a fresh
battery within one minute, you may not lose
your programming. After installing a new
battery, follow the procedures in CHECK
YOUR PROGRAMMING to determine whether your programming was maintained.
If the thermostat retains programming, press
SYSTEM
HEAT - OFF - COOL - AUTO
until OFF is displayed, put the ther-
mostat back on the wall, press SYSTEM
HEAT - OFF - COOL - AUTO
to
select the operating mode you want, then
press RUN
PRGM
to start program operation. If the
program is lost, you must reprogram the
thermostat. See PROGRAMMING YOUR
THERMOSTAT.