Honeywell T8665C Thermostat User Manual


 
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even program the thermostat to return to your
regular programming schedule on your last day
of vacation so you are comfortable when you
return and yet save energy while you are away.
SETTING THE CLOCK
Setting Current Day and Time
IMPORTANT
Always press keys with your fingertip
or similar blunt tool. Sharp instruments
like pens and pencil points can
damage keyboard.
On initial powerup or after an extended power
loss, “1:00 PM” flashes on display until a key is
pressed.
1. Press Set Current Day/Time key.
Press Set Current Day/Time key to show information
displayed.
Setting the clock can be controlled as part of
the system using two-way
RF communication; then
the time is automatically
updated.
2. Press Day key until current
day displays.
M1458
0
Mon
PM
80
90
70
60
90
80
70
60
Day