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System operation settings
1. Press Menu, and then press the Mode (+)
button to cycle to the next available
System mode.
2. Cycle through the modes until the required
System mode is displayed, and then press
Done.
NOTE: Available System modes vary by model
and system settings.
System modes:
‒ Auto: Thermostat selects heating or cooling as needed.
‒ Heat: Thermostat controls only the heating system.
‒ Cool: Thermostat controls only the cooling system.
‒ Em heat (only heat pumps with auxiliary heat): Thermostat controls auxiliary heat. Compressor
is not used. (Em heat on TH3210U model only.)
‒ Off: Heating and cooling system is off. Fan will still operate if fan is set to On.
NOTE: Heat On/Cool On may flash for 5 minutes due to compressor protection.
Fan operation settings
1. Press Menu, and then press the Fan (-)
button to cycle to the next available
Fan mode.
2. Cycle through the modes until the
required Fan mode is displayed, then
press Done.
NOTE: Available Fan modes vary with
system settings.
Fan modes:
‒ Auto: Fan runs only when the heating or
cooling system is on.
‒ On: Fan is always on.
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