Honeywell T8400, T8401 User Manual

Honeywell

Thermostat

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Congratulations on the purchase of your new thermostat!
Over 1O0years of Honeywell engineering expertise went
into the making of this thermostat in an effort to provide
you with a more comfortable and convenient living

environment.

• Simple and easy to use. The • and • keys make it
easy for you to change your temperature setting.

• Large digital display. You can easily read the current
room temperature at a glance.

• No need forbatteries. Batteries are not required
because your temperature settings are held perma-
nently in memory.

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Settings

Setting FANand SYSTEMSwitches

Fan and system settings are controlled by using FAN and
SYSTEM switches located on the bottom of the thermostat

case.

Firstsetthe FANswitch:
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

I I

FAN

SWITCH M10273

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