System operation setting
Press the Mode button to cycle to the next available
1
System mode.
2
Cycle through the modes until the required System
mode is displayed and leave it to activate.
System modes:
• Heat: Controls the heating system.
• Cool: Controls the cooling system.
• Off: Turns the heating and cooling systems off.
• Auto: When enabled, the thermostat will
automatically use heating or cooling to reach the
desired temperature.
• Em Heat: Controls auxiliary or emergency heat; only
available on systems with a heat pump.
NOTES:
• Em Heat and Auto modes may not appear on the
thermostat screen, depending on your equipment
and how the thermostat was configured.
• Em Heat is only available if the thermostat is
configured to control a heat pump and an auxiliary/
emergency heat stage.
• When Auto mode is enabled and initiated, Auto
Chg. On will appear in the upper-right corner of the
thermostat home screen, and the active mode (Heat
or Cool) will be displayed. Auto mode is disabled by
default. To enable it, see "Installer setup – advanced
menu" on page 14 and 16.
Fan operation setting
Press the Fan button to cycle to the next
1
available Fan mode.
2
Cycle through the modes until the required
Fan mode is displayed and leave it to
activate.
NOTE: Available Fan modes vary with system
settings.
Fan modes:
• On: The fan will run continuously.
• Auto: The fan will run only when the heating
or cooling system is on.
• Circ: The fan will run at random intervals at
least 35% of the time to keep air circulating
throughout your home.
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