Honeywell THM5421C1008 Benutzerhandbuch

68-0287—1

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If you don’t have a dehumidifier, the thermostat activates the 

air conditioner to reduce humidity (may cool as much as 3°F 

lower than your temperature setting).

1. Press MORE until the dehumidifier screen is displayed.

2. Press the Up or Down arrow to set the desired humidity 

level and operation (Auto or Off).

3. Press DONE to save and exit, or press CANCEL to exit 

without saving changes.

You can ventilate your home at any time:

1. Press MORE until the ventilation screen is displayed.

2. Press the Up or Down arrow to set the ventilation timer. 

You can set the timer to ventilate from 20 to 180 minutes, 

in 20-minute increments. To turn off the ventilator, select 

0.

3. Press DONE to save and exit, or press CANCEL to exit 

without saving changes.

If programmed for auto-ventilation by the installer, the 

thermostat will ventilate your home as needed.

The filter change reminder must be turned on from the Installer 

Setup. Once expired, the screen flashes, “Change Filter” and a 

Reset key appears. Press the Reset key to reset the change 

reminder. The installer can configure the Filter Change 

Reminder to display remaining run-time or calendar days.

NOTE: When using run-time days, the days are counted as 

fan run time, so anytime the fan is running, the 

reminder is counting that time against the number of 

days selected.

The remaining days can be viewed by pressing the More key; 

the remaining days can be edited using the More key or from 

the Installer Setup. To view or reset the reminder before it 

expires, follow these steps using the More key:

1. Press the More key until the filter reminder appears on 

the screen. This is the number of fan run-time or calen-

dar days remaining on the filter reminder.

2. Press the Edit key.

3. Use the Up and Down keys to change the number of run-

time or calendar days.

4. Press the Done key to go back to the viewing screen.

SCHED

HOLD

CLOCK SCREEN

MORE

MON

MON

TUE

WED

WED

THU

THU

FRI

FRI

SSAA

SUN

AUTO

HEAT

HEAT

COOL

RESET

M23511

SCHED

SCHED

HOLD

HOLD

CLOCK SCREEN

MORE

DONE

WAKE

LEAVE RETURN SLEEP

EDIT

CANCEL

MON

TUE

WED

THU

FRI

SAT

SUN

RESET

DAYS

M22449

SCHED

SCHED

HOLD

HOLD

CLOCK SCREEN

DONE

WAKE

LEAVE RETURN SLEEP

CANCEL

MON

TUE

WED

THU

FRI

SAT

SUN

DAYS

M22450

SCHED

SCHED

HOLD

HOLD

CLOCK SCREEN

MORE

DONE

WAKE

LEAVE RETURN SLEEP

EDIT

CANCEL

MON

TUE

WED

THU

FRI

SAT

SUN

RESET

DAYS

M22449