Honeywell T8665C Thermostat User Manual


 
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NOTE: Only the heating temperature is used
when System is set to Heat. Similarly,
only the cooling temperature is used
when System is set to Cool. The
thermostat uses both heating and
cooling temperatures when System is
set to Auto.
Press increase or decrease key to select a new
Hold temperature. Example display shows temporary
heat setting of 55°.
5. Press Heat/Cool Settings key
to change between heat and
cool settings.
6. Press increase or decrease to
adjust temperature setting, if desired (for
example, if cool is set to 84°, cooling
equipment operates when room
temperature is above 84°F).
7. Press Run Program to start
over or return display to
normal.
M1457
2
System
Fan
Heat
Auto
Heat/Cool
Settings
Run
Program