Honeywell TH8000 Series Operating Your Thermostat, Setting Fan and System Keys, Setting FAN KEY

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Operating Your Thermostat

Setting Fan and System Keys

SETTING FAN KEY

The Fan key selections vary based on your heating and/or cooling system type.

On—fan runs continuously. Use this setting for improved air circulation or for more efficient central air cleaning.

Auto—fan follows fan program schedule. See Fan Schedule section for more information.

Circ— fan runs randomly approximately 35% of time. Use this setting for improved air circulation or for more efficient central air cleaning when you do not want the fan running continuously.

SETTING SYSTEM KEY

The System key selections vary based on your heating and/or cooling system type. Heat — thermostat controls your heating system.

Off —both heating and cooling systems are off. Cool — thermostat controls your cooling system.

Auto — thermostat controls both your heating and cooling system based on temperature.

Em. Heat (heat pump systems only) —thermostat controls emergency heat and auxiliary heat, if needed. Heat pump is not operational.

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Contents TH8000 Series Programmable Thermostats Contents Features Home Screen Key Description Down ArrowHome Screen Display Description TimeProgramming Your Heating and Cooling Schedule Editing ScheduleM19955 Saving Changes Cancelling a Schedule Period OK to Pick Multiple Days FAN Setting Time Setting Fan and System Keys Setting FAN KEYSetting System KEY Operating Your ThermostatSetting Temperature Overrides Hold Temperature Until Temporary HoldPermanent Hold Vacation Hold Inside Fan Schedule Fan Status Displayed on Home ScreenManual Override of Fan Schedule Replacing Your Batteries Remove thermostat from the base by pulling straight out Batteries Cleaning Your Thermostat Screen Reading Your Outdoor Temperature Select Models View Outside Temperature Select ModelsReading Your Remote Indoor Temperature Select Models ONE Remote Indoor Sensor Installed Select ModelsMultiple Remote Indoor Sensors Installed Select Models Reminder Timers Select Models Resetting Expired TimersView or Reset Timer Settings Before They Expire Screen LockedPartially Locked Screen Fully Locked Screen Reading Your Inside Humidity Level Select ModelsInside Temperature Recovery Dehumidification Control Select ModelsRecovery Advanced Heat Pump Features Select Models Setting CalendarSetting Calendar After Thermostat is Already Functioning Setting Calendar When Thermostat is First PoweredSET Current DAY SET Month Advanced Settings Press to Exit Change User Setup Current Setting User Setup Number 0140 Current Calendar Month User Setup Number 0150 Current Calendar Date User Setup Number 0160 Schedule OptionsUser Setup Number 0320 Display Temperature Shown in F or C User Setup Number 0330 Daylight Savings On or Off User Setup Number 0500 Furnace Air Filter TimerUser Setup Number 0510 Humidifier Pad Timer User Setup Number 0520 UV Lamp TimerUser Setup Number 0640 Time Format User Setup Number 0670 Screen Lockout Function Exit User SetupFrequently Asked Questions and Answers Limited Five-Year Warranty Customer Assistance