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39 69-2715ES—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 SYSTEM again to select an option.
You may need to press two or three times to
make a selection—the selected option blinks.
3 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.
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MCR31554