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Step 11: Set Fan and System Switches
First set the fan switch.
FAN AUTO: Normal setting for most homes. A
single-speed fan turns on automatically with
the air conditioner or furnace. A two-speed fan
usually runs on high with the air conditioner
and on low with the furnace.
Exception: If the fan operation switch on the
back of the thermostat is set to the
E position (see page 20), the fan
operates only with the furnace.
FAN ON: The fan runs continuously. Use for
improved air circulation during special occa-
sions or for more efficient electronic air
cleaning. (In a heat-only system, fan runs
continuously only if the fan relay is connected
to the thermostat.)
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