Press to select the
function displayed just
above each button.
(Functions change
depending on the task.)
Reference card
Battery holder
Hold Button
Press to override programmed
temperature control
Temperature buttons
Press to set preferred temperature.
Digital display
Display screen
Low battery
warning
Current inside
temperature
Press the SET
button to change:
Clock: Current time.
Day: Current day.
Schedule: Current
thermostat program
schedule.
Press the FAN
button to select:
Auto: Fan runs only
when heating or
cooling system is on.
On: Fan runs
continuously.
Inside
72
WakeWed
Set Clock/Day/
Schedule
Function buttons
Press the button beneath
each function to view
or change settings
(functions change
depending on the task)
Program Schedule
Auxiliary heat (Only
for heat pumps with
auxiliary heat)
Replace Battery
In Recovery
6:30
Fan
Auto
AM
72
Auxiliary
System
Heat
Setting
Heat On
Temperature setting
System Status
Heat
Cool On: Cooling system
is on.
Heat On: Heating system
is on.
Press the SYSTEM button
to select:
Heat: Heating system control.
MCR29458
Cool: Cooling system control.
Off: All systems off.
Auto: Thermostat
automatically selects heating
or cooling depending on the
indoor temperature.
Em Heat: Emergency &
Auxiliary Heat control.
Compressor is locked out.
(Select models only.)
You can program four time periods each day, with different settings for weekdays
and weekends. We recommend the pre-set settings (shown in the table below),
since they can reduce your heating/cooling expenses by as much as 33%.
Wake - Set to the time you
awaken and the temperature you
want during the morning, until
you leave for the day.
Leave - Set to the time you leave
home and the temperature you
want while you are away (usually
an energy-saving level).
Return - Set to the time you
return home and the temperature
you want during the evening, until
bedtime.
Sleep - Set to the time you go to bed and the temperature you want overnight
(usually an energy-saving level).
NOTE: Leave and Return periods can be canceled on weekends.
Wake
(6:00 am)
Leave
(8:00 am)
Return
(6:00 pm)
Sleep
(10:00 pm)
2
HeatCool
°
70
°
62
°
70
°
62
75
83
75
78
°
°
°
°
To adjust program schedules
1. Press SET CLOCK/DAY/SCHEDULE,
then SET SCHEDULE.
2. Press s or t to set your weekday
Wake time (Mon–Fri), then press
NEXT.
3. Press s or t to set the temperature
for this time period, then press NEXT.
4. Set time and temperature for the
next time period (Leave). Repeat
steps 2 and 3 for each weekday time
period.
5. Press NEXT to set weekend time
periods (Sat-Sun), then press DONE
to save & exit.
NOTE: Make sure the thermostat is
set to the system you want to program
(Heat or Cool).
NOTE: You can press CANCEL PERIOD to
eliminate unwanted time periods (except
Wake).
Set Clock/Day/
Schedule
Done
Mon Tue Wed Thu Fri
Leave
Done
Set Schedule
Program schedule override (temporary)
Press s or t to immediately adjust
the temperature. This will temporarily
override the temperature setting for
the current time period.
The new temperature will be
maintained only until the next
programmed time period begins.
For example, if you want to turn up
the heat early in the morning, it will
automatically be lowered later, when
you leave for the day.
To cancel the temporary setting at
any time, press RUN SCHEDULE.
NOTE: Make sure the thermostat is
set to the system you want to control
(heat, cool or auto).
Inside
69
Run Schedule
6:30
FanSystem
Auto
FanSystem
Auto
Set DaySet Schedule
AM
8:00
CancelPeriod
Temporary
75
AM
Heat
62
Next
Heat
Setting
Cool
Heat
Setting
MCR29463
3
Program schedule override (permanent)
Press HOLD to permanently adjust
the temperature. This will override
the temperature settings for all time
periods.
The “Hold” feature turns off the program
schedule and allows you to adjust the
thermostat manually, as needed.
Whatever temperature you set will
be maintained 24 hours a day, until
you manually change it, or press RUN SCHEDULE to cancel “Hold” and resume
the programmed schedule.
NOTE: Make sure the thermostat is set
to the system you want to control (heat,
cool or auto).
Inside
69
Run Schedule
AM
6:30
FanSystem
Auto
Hold
Heat
Heat
Setting
75
MCR29464
Auto changeover (heat/cool)
Auto Changeover is a feature used in climates where both air conditioning
and heating are used on the same day. When the system is set to Auto, the
thermostat automatically selects heating or cooling depending on the indoor
temperature.
Heat and cool settings must be at least 3 degrees apart. The thermostat will
automatically adjust settings to maintain this
3-degree separation (called “deadband”).
The 3-degree separation between heating and cooling set temperatures is fixed,
and cannot be changed.
1. Press system button until screen
displays “Auto”.
NOTE: The Auto system setting may
not appear, depending on how your
thermostat was installed
Set Clock/Day/
Schedule
FanSystem
Auto
Auto
MCR29465
4
Built-in compressor protection
Damage can occur if the compressor is
restarted too soon after shutdown. This
feature forces the compressor to wait for
a few minutes before restarting.
During the wait time, the display will
flash the message Cool On (or Heat On
if you have a heat pump). When the safe
wait time has elapsed, the message
stops flashing and the compressor turns
on.
Inside
75
Set Clock/Day/
Schedule
Message flashes until safe
restart time has elapsed.
AM
6:30
FanSystem
Auto
Cool
Setting
75
Cool On
Cool
MCR29466
Adaptive Intelligent Recovery™
Adaptive Intelligent Recovery eliminates guesswork when setting your schedule.
It allows the thermostat to “learn” how long your furnace and air conditioner take
to reach the temperature you want.
Just set your program schedule to the time you want the house to reach your
desired temperature. The thermostat then turns on the heating or cooling at just
the right time to reach your scheduled temperature at your scheduled time.
For example: Set the Wake time to 6 am and the temperature to 70°. The heat
will come on before 6 am, so the temperature is 70° by the time you wake at 6.
Note: When Adaptive Intelligent Recovery is in effect, the thermostat will display
“In Recovery”.
5
Battery replacement
Batteries are optional (to provide
backup power) if your thermostat
was wired to run on AC power when
installed.
Install fresh batteries immediately when
the REPLACE BATTERY warning
begins flashing. The warning flashes
about two months before the batteries
are depleted.
Even if the warning does not appear,
you should replace batteries once a
year, or before leaving home for more
than a month.
If batteries are inserted within two
minutes, the time and day will not
have to be reset. All other settings are
permanently stored in memory, and do
not require battery power.
Customer assistance
Press and pull to remove.
Replace Battery
Insert fresh AA alkaline
batteries, then reinstall
battery holder.
MCR29467
For assistance with this product, please
visit yourhome.honeywell.com.
Or call Honeywell Customer Care tollfree at 1-800-468-1502.
Turn thermostat over to find
model number and date code.
CAUTION
Equipment damage hazard
To prevent possible compressor damage, do not operate cooling system
when outdoor temperature is below 50°F (10°C).
Press and pull to remove.
xxxxxxxxxxxxxx
MCR29468
6
Troubleshooting
If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Display is
blank
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is
on.
• Make sure furnace door is closed securely.
• Make sure fresh AA alkaline batteries (depending on
model) are correctly installed (see page 6).
Heating
or cooling
system does
not respond
Temperature
settings do
not change
“Cool On” or
“Heat On” is
flashing
To restore
default
settings
• Press SYSTEM button to set system Heat (see page 2).
Make sure the temperature is set higher than the Inside
temperature.
• Press SYSTEM button to set system to Cool (see page 2).
Make sure the temperature is set lower than the Inside
temperature.
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is
on.
• Make sure furnace door is closed securely.
• Wait 5 minutes for the system to respond.
Make sure heating and cooling temperatures are set to
acceptable ranges:
• Heat: 40° to 90°F (4.5° to 32°C).
• Cool: 50° to 99°F (10° to 37°C).
• Compressor protection feature is engaged. Wait 5
minutes for the system to restart safely, without damage
to the compressor (see page 5).
Follow these steps to restore default settings:
1. Press SETCLOCK/DAY/SCHEDULE.
2. Press SET SCHEDULE.
3. Press DONE and NEXT at the same time for 4 seconds.
7
5-year limited warranty
Honeywell warrants this product, excluding battery, to be free from defects in the
workmanship or materials, under normal use and service, for a period of five (5) years
from the date of purchase by the consumer. If at any time during the warranty period the
product is determined to be defective or malfunctions, Honeywell shall repair or replace it
(at Honeywell’s option).
If the product is defective,
(i) return it, with a bill of sale or other dated proof of purchase, to the place from which you
purchased it; or
(ii) call Honeywell Customer Care at 1-800-468-1502. Customer Care will make the
determination whether the product should be returned to the following address:
Honeywell Return Goods, Dock 4 MN10-3860, 1885 Douglas Dr. N., Golden Valley, MN
55422, or whether a replacement product can be sent to you.
This warranty does not cover removal or reinstallation costs. This warranty shall not apply
if it is shown by Honeywell that the defect or malfunction was caused by damage which
occurred while the product was in the possession of a consumer.
Honeywell’s sole responsibility shall be to repair or replace the product within the terms
stated above. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE
OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES
RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY,
EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states
do not allow the exclusion or limitation of incidental or consequential damages, so this
limitation may not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON
THIS PRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,
IS HEREBY LIMITED TO THE FIVE-YEAR DURATION OF THIS WARRANTY.
Some states do not allow limitations on how long an implied warranty lasts, so the above
limitation may not apply to you. This warranty gives you specific legal rights, and you may
have other rights which vary from state to state.
If you have any questions concerning this warranty, please write Honeywell Customer
Relations, 1985 Douglas Dr, Golden Valley, MN 55422 or call 1-800-468-1502. In Canada,
write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive,
Toronto, Ontario M1V4Z9.
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
yourhome.honeywell.com