Honeywell RTH8580ZW - System Mode Selection and Filter Reminders

13 33-00131ES—01
Selecting system mode
Note: The AUTO and EM HEAT
system settings may not
appear, depending on how
your thermostat was installed.
1 Press SYSTEM to display options.
2 Press DONE to save setting.
Possible system modes:
HEAT: Controls only the heating system.
COOL: Controls only the cooling system.
OFF: Heating/cooling systems are off.
AUTO: Selects heating or cooling
depending on the indoor temperature.
EM HEAT (heat pumps with aux. heat):
Controls auxiliary/emergency heat.
Compressor is locked out.
SCHEDHOLDCLOCK SCREEN
WED
AM
Inside
6:01
70
SYSTEM
HEAT
FAN
AUTO
Following
Schedule
Set To
70
Setting filter reminder intervals
MCR31559
SLEEP
FILTER
DAYS
CHANGE FILTER
Inside
RESET
MORE
If activated during installation, the filter reminder
alerts you with a message above the time when
it is time to replace your filter.
Press RESET after changing the filter, to restart
the timer.
To change the reminder interval:
1 Press MORE, then EDIT.
2 Press s or t to select the desired interval
(in days), then press DONE.
3 Press RESET.
4 Press DONE to save and exit.
Note: System setting function 0500 governs the
filter interval. See “System setup” on page 19.