Carrier P374-1500 Owner's Manual page 5

Display
Outside Indication
5
Indicates the temperature displayed is from
the optional outside sensor. Page 21.
6 Morning, Day, Evening & Night Indication
Indicates the program time period. Page 8-11.
Setup Indication
7
Indicates the thermostat is in the programming
mode. Page 12.
Fan Operation Indication
8
Fan On - indicates constant, continuous fan
operation.
When Fan On is not lit - indicates the fan will
only operate when necessary to heat or
to cool. Page 7.
Service Filter Indication
9
Service Filter
be serviced under normal conditions.
Appears after 0 - 1950 hours of blower
operation (adjustable). Page 15.
Locked Indication
10
Locked appears after the right combination of
buttons are pressed, rendering the buttons
inoperative. Page 22.
Start Indication
11
Start appears when programming
timer functions. Page 8.
Unoccupied indication
12
Unoccupied appears when in the
Vacation mode. Page 23.
indicates when the filter should
Page 4