White Rodgers 1F90W-51 - Manual (Page 8)

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The word BATTERY flashes on the display
when the "AA" alkaline batteries are weak
and should be replaced. The word BAT-
TERY is displayed continuously (non-flash-
ing) when thermostat is running on battery
power only.
FAN ON is displayed when the blower is
operating continuously. FAN AUTO is dis-
played during automatic fan operation (when
the blower cycles with the heating or cooling
system).
The Display
Continuously displays system mode (HEAT,
OFF, COOL, HOLD). During programming,
the program period is displayed (MOR, DAY,
EVE, or NHT).
Alternately displays room temperature (F
denotes degrees Fahrenheit and C denotes
degrees Celsius) and time of day (A de-
notes AM time and P denotes PM time).
Displays the setpoint temperature.
5 DAY indicates that the displayed program
is the weekday program. 2 DAY indicates
that the displayed program is the weekend
program.
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