Operating Manual
About your new thermostat
669-2425EFS—03
ENGLISH
M32288
Heat Off Cool
Auto On
Fan
The SYSTEM switch can be set to con-
trol your heating or cooling system,
depending on the season.
• Cool: Cooling system control.
• Off: All systems are off.
• Heat: Heating system control.
• Em Heat: Emergency &
Auxiliary Heat control. Compressor
is locked out. (Select models only.)
System switch
Set SYSTEM switch to control the heating or
cooling system.
CAUTION: EQUIPMENT DAMAGE
HAZARD. Do not operate cooling system
when outdoor temperature is below 50°F
(10°C).
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