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Setting Fan And System Switches - Honeywell T8400C1099 Owner's Manual

Owner's manual

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Settings

Setting FAN and SYSTEM Switches

Fan and system settings are controlled by using FAN and
SYSTEM switches located on the bottom of the thermostat
case.
First set the FAN switch:
Auto:
Normal setting for most homes. In cooling, the
fan goes off and on with the cooling equipment.
In heating, the fan may start a few minutes after
the heating equipment comes on.
On:
The fan runs continuously. Use for improved air
circulation and air quality.
FAN
Auto On
FAN
SWITCH
3
M10273
69-1491–1

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