Honeywell CHRONOTHERM IV T8665A - Manual (Page 31)

31 69-1536–3
About Power Outages…
Don’t worry! Your thermostat retains the schedule (preprogrammed or your own) for the life of the
product. The time and day information is retained for a minimum of twenty minutes during a
power outage. After a longer power outage, you may need to set the current time and day (“1:00
PM” flashes on the display), but the schedule is retained.
Programming the First Day
To modify the preprogrammed schedule, start by programming the Wake time and temperature and fan operation
for any one day.
80 90 70
60
90 80 70
60