Prestige® Touch Screen Thermostat
YTHX9421R, THX9421R
Product Information
Read and save these instructions
Setting the time/date
1. Touch the current time. The screen displays Set Time/Set
Date.
2. Touch Set Time or Set Date.
3. Touch
or
until the proper time/date is displayed.
s
t
4. Touch Done to save or Cancel to ignore changes.
NOTE:
The thermostat will automatically switch to and from
Daylight Saving Time.
Setting system mode
1. Touch SYSTEM to display system settings.
2. Touch desired option: Heat, Cool, Off, Auto, Em Heat.
3. Touch Done to save and exit.
NOTE:
The Auto and Em Heat system settings may not
appear, depending on how your thermostat was installed.
Quick reference: residential use
Quick reference: commercial use
HOME. Touch to display Home screen.
FAN. Select fan mode.
SYSTEM. Select system mode (Heat/Cool).
MENU. Touch to display options. Start here
to set a program schedule.
Current schedule. Touch an arrow to
change temperature setting and select a
Temporary or Permanent Hold.
Indoor conditions. Shows indoor
temperature and humidity.
Current date and time.
Current status. Shows system mode (heat/
cool), outdoor temperature and humidity
(with optional outdoor sensor).
HOME. Touch to display Home screen.
FAN. Select fan mode.
SYSTEM. Select system mode (Heat/Cool).
MENU. Touch to display options. Start here
to set a program schedule.
Thermostat location. Quickly identify
which thermostat is in control of a specific
area.
Current schedule. Touch an arrow to
change temperature setting and set a
temporary hold.
Override. Touch to temporarily override the
program schedule.
Indoor conditions. Shows indoor
temperature and humidity.
Current date and time.
Current status. Shows system mode (heat/
cool), outdoor temperature and humidity
(with optional outdoor sensor).
USB port. Use USB device to load holiday
schedules and custom events.
HOME
FAN
Fri, Apr 26, 2019
6:30 pm
OUTDOOR
80°/55% Humidity
STATUS
cool mode
Adjusting program schedules
1. Touch MENU.
2. Select Create/Edit Schedule.
3. Touch Guide Me to create a schedule by answering simple
questions.
Adjusting humidification, dehumidification,
or ventilation settings
1. Touch MENU and select Humidification, Dehumidification, or
Ventilation.
2. Touch Select to adjust the settings.
Product manuals
Search online for 69-2740EFS for the User Guide.
Go to https://www.honeywellhome.com/en/products/
thermostat/prestige-hd-7-day-programmable-thermostat for
more information.
Videos
Search online for Prestige IAQ Videos.
Need help?
For assistance please visit honeywellhome.com,
or call toll-free: 1-800-468-1502.
This thermostat contains a Lithium battery which may
contain Perchlorate material. Perchlorate Material—
special handling may apply.
See www.dtsc.ca.gov/hazardouswaste/perchlorate
Electrical ratings
20-30 Volts AC at R and C. 3 VA max. 50-60Hz.
The operation of this equipment is subject to the following two
conditions: (1) this equipment or device may not cause harmful
interference, and (2) this equipment or device must accept any
interference, including interference that may cause undesired
operation.
MENU
SYSTEM
INDOOR
72
°
SET TO
72
°
45% Humidity
following schedule
33-00307EFS-03