Honeywell T8635L Thermostat User Manual

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T8635L Microelectronic Communicating  
Programmable Thermostat  
USER’S GUIDE  
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CONTENTS  
USING THIS GUIDE ..........................................................................................................................................  
5
6
FEATURES ........................................................................................................................................................  
KEYBOARD AND DISPLAY DESCRIPTION ....................................................................................................  
Keyboard............................................................................................................................................................  
Display ...............................................................................................................................................................  
7
7
7
ADAPTIVE INTELLIGENT RECOVERY™ CONTROL ..................................................................................... 10  
Optimum Comfort and Energy Savings……………………………………………………………………………….. 11  
OPERATING YOUR THERMOSTAT ................................................................................................................. 13  
Setting System and Fan Keys............................................................................................................................ 13  
Setting the System Key .................................................................................................................................. 14  
Setting the Fan Key ........................................................................................................................................ 14  
Setting Temporary Temperatures ....................................................................................................................... 15  
Changing Temperature to Temporary Setting Until Next Schedule Period .................................................... 15  
Changing and Holding Temperature Setting Indefinitely ................................................................................ 17  
Changing Temperature Setting Until a Designated Day and Period (Vacation Hold) ..................................... 18  
Using the  
(Information) Key ......................................................................................................................... 21  
Displaying Outdoor Temperature .................................................................................................................... 21  
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Contents (Cont)  
Displaying Current Settings ............................................................................................................................ 22  
Filter Indicator .................................................................................................................................................... 23  
Setting or Resetting Filter Indicator ................................................................................................................ 23  
LED Indicators ................................................................................................................................................... 25  
Remote Override Temperature Indicator ............................................................................................................ 25  
SETTING THE CLOCK...................................................................................................................................... 26  
Set Current Day and Time ................................................................................................................................. 26  
Daylight Saving Time ......................................................................................................................................... 28  
PROGRAMMING YOUR THERMOSTAT .......................................................................................................... 29  
7
-Day Program and Operation ........................................................................................................................... 29  
7-Day Preprogrammed Schedule ................................................................................................................... 30  
Customizing Your Own 7-Day Schedule ........................................................................................................ 31  
Programming the First Day ............................................................................................................................ 32  
Copying a Day ................................................................................................................................................ 37  
Clearing a Program Period ............................................................................................................................. 40  
TROUBLESHOOTING....................................................................................................................................... 42  
WARRANTY ...................................................................................................................................................... 45  
CUSTOMER ASSISTANCE ............................................................................................................................... 47  
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USING THIS GUIDE  
The T8635L is a multi-functional thermostat. This means it can be used in several different ways such as single  
or multi-zone applications, conventional furnaces or heat pump equipment.  
The following symbols will help you identify the features that apply to your system:  
Triple layer of thermostats with the word, zoning, below. These features are available when more  
than one thermostat is connected and used with the optional W8703 Damper Interface Module.  
ZONING  
Compressor with the word, heat pump, below. These features are available when used with a heat  
pump with auxiliary heat.  
HEAT PUMP  
Tip symbol. Look for helpful tips throughout the guide when you see this symbol.  
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FEATURES  
Adaptive Intelligent Recovery™ Control for comfort  
and energy savings.  
Customize the program schedule—program your  
own schedule to fit your needs.  
Temporary schedule override—set the thermostat  
higher or lower for the current program schedule.  
Permanent schedule override—set the thermostat  
higher or lower indefinitely.  
Vacation mode (1 to 255 days) for added comfort  
and energy savings. Set the temperature higher or  
lower for energy savings while on vacation. At the  
same time, set the comfort level you want when  
you return.  
No batteries needed—your thermostat retains the  
schedule for the life of the product. You never have  
to reprogram the schedule even after a power  
outage. (You may need to reset the day and time  
after an extended power outage.)  
Daylight Time key for quick time changes between  
Daylight and Standard time.  
Backlit display for improved readability—set the  
backlight feature for backlighting on demand  
(press any key to activate) or continual backlight-  
ing. Ask your installer to program this feature.  
Optional outdoor temperature display—ask your  
installer to install an outdoor temperature sensor to  
activate this feature.  
Set the filter indicator (0, 15, 30, 60, 90, or  
1
20 days) to remind you to change the filter.  
Information at the press of a button—use the  
information) key to see the outdoor tempera-  
(
ture (C7089B Outdoor Temperature Sensor  
optional accessory), the current setpoints, or  
the filter status.  
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KEYBOARD AND DISPLAY DESCRIPTION  
Keyboard  
The keyboard is located behind the thermostat cover. Three frequently used keys, increase or decrease ▲  
and  
, are located next to the display. See Fig. 1.  
Display  
The thermostat displays important information such as day, time, schedule period, temperature, filter information,  
system and fan operation. See Fig. 2.  
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TIME  
/ TIME  
WAKE  
SET WAKE TIMES AND  
TEMPERATURES  
LEAVE  
SET LEAVE TIMES AND  
TEMPERATURES  
DIGITAL  
DISPLAY  
INCREASE  
RAISES TEMPERATURE SETTING  
SETS TIME  
FORWARD OR BACK  
SET CURRENT  
DAY/TIME  
DECREASE  
LOWERS TEMPERATURE SETTING  
SETS CURRENT  
DAY AND TIME  
INFORMATION  
DISPLAYS CURRENT HEAT/COOL  
TEMPERATURE SETTING  
RUN PROGRAM  
RETURNS THERMOSTAT TO  
NORMALOPERATING MODE  
RETURN  
SET RETURN TIMES AND  
TEMPERATURES  
DAY  
Run  
Set Current  
SLEEP  
SET SLEEP TIMES AND  
TEMPERATURES  
SETS DAY OF THE WEEK  
Wake  
Leave  
Set Program  
Filter  
System  
Return  
Sleep  
Fan  
Program  
Day/Time  
Time  
Copy  
HOLD TEMP  
Heat/Cool  
Settings  
Hold Temp  
Day  
SETS A HOLDTEMPERATURE  
SETTING AND ACTIVATES  
VACATION HOLD FEATURE  
PROGRAM SCHEDULING  
WAKE LEAVE RETURN SLEEP  
ENTERS PROGRAMMING MODE  
Daylight  
Time  
FAN  
DAYLIGHT TIME  
SELECTS AUTO/ON  
SELECTS STANDARD TIME  
OR DAYLIGHT SAVING TIME  
SYSTEM  
SELECTS HEAT/OFF/COOL (AUTO)  
COPY  
COPIES SETTINGS FROM ONE DAY TO  
HEAT/COOL SETTINGS  
SWITCHES BETWEEN HEAT SETPOINTS AND  
COOL SETPOINTS WHILE PROGRAMMING  
FILTER  
ANOTHER DAY FOR QUICKPROGRAMMING  
SELECTS FILTER TIMER REMINDER  
PERIOD (0, 15, 30, 60, 90, 120 DAYS)  
M17459  
Fig. 1. Thermostat keyboard description.  
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SHOWS THERMOSTAT IS  
PROCESSING INFORMATION  
AND WAITING TO CALL FOR  
HEAT OR COOL  
SHOWS WHEN  
THERMOSTAT  
IS IN THE  
PROGRAMMING  
MODE  
SHOWS  
THERMOSTAT  
IS IN THE  
SET CURRENT  
DAY/TIME MODE  
SHOWS  
SHOWS TEMPERATURE  
DISPLAYED IS THE CURRENT  
SET TEMPERATURE  
TEMPERATURE  
SETTING CHANGED  
FOR THIS  
PROGRAM  
PERIOD  
SHOWS THAT THERMOSTAT  
IS CALLING FOR  
SHOWS SMART  
RESPONSE IS CHANGING  
THE TEMPERATURE  
TO MEET THE  
HEAT  
OR COOL  
System  
Em Heat  
Wait Set Program Set Day/Time  
Temporary Setting  
CURRENT PROGRAM  
SHOWS CURRENT  
SYSTEM KEY POSITION  
HEAT/OFF/COOL  
Recovery  
Hold for  
Filter  
AM  
Off  
Cool  
Auto  
SHOWS VACATION  
HOLD DURATION  
Days  
SHOWS CURRENT FAN  
KEY POSITION ON/AUTO  
SHOWS FILTER TIMER  
EXPIRED (TIME TO  
REPLACE FILTER)  
Fan  
On  
MonTueWedThuFriSatSun  
Wake Leave Return Sleep DST  
Room  
Auto  
SHOWS CURRENT  
DAY OR DAYS BEING  
PROGRAMMED  
SHOWS SYSTEM ON  
DAYLIGHT SAVING TIME  
SHOWS SMART  
RESPONSE IS OFF  
AND CONVENTIONAL  
RECOVERY IS ON  
SHOWS THERMOSTAT IS  
CALLING FOR THE FAN  
SHOWS  
TEMPERATURE  
EITHER CURRENT DISPLAYED IS THE  
SHOWS CURRENT  
PROGRAM PERIOD  
OR PERIOD BEING  
PROGRAMMED  
DISPLAYS  
SHOWS THERMOSTAT  
TEMPERATURE IS  
BEING SET REMOTELY  
TIME OF DAY OR  
PROGRAM TIMES  
CURRENT ROOM  
TEMPERATURE  
DISPLAYS EITHER ROOM  
OR SET TEMPERATURE  
M17756  
Fig. 2. Example of thermostat display.  
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Recovery™ control gradually changes the tempera-  
ture from the energy savings setting to the comfort  
setting (for example, from a heating temperature of  
ADAPTIVE INTELLIGENT  
RECOVERY™ CONTROL  
62° at night to 70° in the morning).  
Your new thermostat is so smart, it’s almost human.  
You perceive temperature from a variety of sources,  
not only from the air in the room, but also from your  
surrounding walls, windows and furnishings. Humans  
feel differences in temperature as slight as two  
degrees Fahrenheit. Common household thermo-  
meters and standard thermostats sense only air temp-  
erature, which may not reflect how hot or cold the  
room actually feels to you. Your new thermostat reads  
both the temperature of the wall and in the air, and  
responds to temperature changes as little as one  
degree Fahrenheit, so room temperature is more  
likely to feel right to you and your family.  
The system runs continuously until the comfort  
temperature you choose is reached without over-  
shooting the setting. This saves energy. How do you  
know when the system is in recovery? The thermostat  
displays “Recovery” whenever the thermostat  
activates Adaptive Intelligent Recovery™ control. See  
Fig. 3. So, “Recovery” displays during the recovery  
time from Sleep to Wake and from Leave to Return.  
System  
Em Heat  
Recovery  
Mon  
AM  
Fan  
The thermostat acts like a computer. When calculat-  
ing the time to turn on your heating or cooling system,  
it considers air temperature, wall temperature, and the  
time you want to reach the comfort temperature. After  
considering these three things, Adaptive Intelligent  
Room  
Heat  
Sleep  
Auto  
M14561  
Fig. 3. Example of “Recovery” indication.  
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After installation or new schedule programming, your  
thermostat learns from experience. Each day it  
checks how closely it hit the recovery target (for  
example, 70° at 6:00 AM) and adjusts the next day’s  
recovery start time accordingly. After four to eight  
days, the thermostat has adjusted to local weather,  
your lifestyle, the construction of your home, and your  
heating and cooling system.  
Optimum Comfort and Energy Savings  
In Fig. 4, Adaptive Intelligent Recovery™ control  
starts to recover at 5:00 AM and reaches the comfort  
temperature of 68° at 6:30 AM. Recovery time varies  
with the starting temperature and the comfort temp-  
erature you choose.  
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At 7:00 AM System  
Operating in Comfort Mode  
System  
Heat  
AM  
At 6:00 AM  
Recovery  
Continues  
Fan  
Mon  
Wake  
Room  
Auto  
System  
Heat  
Recovery  
AM  
Fan  
At 5:00 AM  
Recovery  
Continues  
Mon  
Room  
Sleep  
Auto  
System  
Heat  
1
Recovery  
AM  
Fan  
Mon  
Room  
At 4:00 AM  
Recovery Begins  
Sleep  
Auto  
System  
Heat  
Recovery  
AM  
Fan  
Mon  
Room  
Sleep  
Auto  
ENERGY  
SAVINGS  
PERIOD  
COMFORT  
PERIOD  
RECOVERY FROM ENERGY SAVINGS  
TIME  
THE THERMOSTAT USES THE SAME SCHEME TO RETURN GRADUALLY TO LOWER COMFORT TEMPERATURE DURING THE COOLING SEASON.  
M17758  
1
IF In Recovery IS DISPLAYED, PRESS  
TO SEE THE COMFORT SETPOINT.  
Fig. 4. Explanation of Adaptive Intelligent Recovery™ control.  
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OPERATING YOUR THERMOSTAT  
Your new thermostat saves energy and keeps you  
comfortable at the same time. By now you may be  
wondering how to program your thermostat and how  
to use some more time and energy-saving features.  
Setting System and Fan Keys  
Use the System and Fan keys to change the system  
and fan settings. The fan settings can be set for each  
schedule period individually. The system selection is  
for all the schedule periods.  
First, let’s look at features you’ll be using often, like  
setting the System and Fan keys, how to override the  
current programming mode or to hold the thermostat  
at a specific temperature while you go on vacation.  
You can even program the thermostat to return to  
your regular programming schedule on your last day  
of vacation so you are comfortable when you return  
and yet save energy while you are away.  
CAUTION  
Equipment Damage Hazard.  
Can cause permanent damage to the  
compressor or other equipment.  
To avoid possible compressor damage, allow  
the compressor to remain off for five minutes  
before restarting.  
To avoid possible equipment damage, do not  
operate cooling when the outside temperature  
is below 50°F (10°C). See equipment manu-  
facturer instructions.  
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Em.Ht: Emergency heat is controlled as  
stage 1 heat. Cooling system is off.  
Compressor is de-energized. (Available  
only with multistage heat pump.)  
Setting the System Key  
Press the System key until the desired  
system (Heat, Off, Cool, or Auto) displays.  
System  
HEAT PUMP  
Heat: The thermostat controls the heating.  
Off: Both the heating and cooling are off.  
Cool: The thermostat controls the cooling.  
Auto: The thermostat automatically changes  
between heating and cooling operation,  
depending on the indoor temperature.  
Setting the Fan Key  
Press Fan key until the desired mode  
(On or Auto) displays:  
Fan  
On: Fan operates continuously.  
Auto is not available when used with zoning.  
Auto: Fan operates only when heating  
or cooling.  
Changing any thermostat system  
ZONING  
setting on any thermostat automatically  
changes the system setting in all zones. For example,  
changing the zone 1 thermostat from Heat to Cool  
causes all thermostats to change from Heat to Cool.  
displays when the thermostat is calling  
for the fan in this zone. A flashing  
indicates that the thermostat is waiting  
until another zone has completed its  
ZONING  
call for heat or cool before initiating the fan call for  
this zone.  
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Setting Temporary Temperatures  
You can override the current schedule period to temporarily change the temperature setting until the next schedule  
period, or you can change and hold the temperature setting indefinitely. You can also change the temperature setting  
until a designated day and period (for example, while you are on vacation).  
Changing Temperature to Temporary Setting Until Next Schedule Period  
Press increase or decrease until the desired temperature  
setpoint displays.  
Temporary Setting  
The temporary temperature setting you select displays for  
approximately three seconds. The display reads “Temporary”  
until the next period begins or when you cancel the temporary  
temperature setting.  
M14563  
While selecting a temporary setting, only the setpoint displays.  
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Press the Run Program key to cancel the temporary  
temperature setting before the designated time.  
System  
Heat  
Temporary  
Run  
Program  
AM  
Fan  
Mon  
Heat  
Auto  
M14564  
After selecting a temporary setting, the display reads  
“Temporary” until canceled. Example display shows  
temporary heat setting of 70° at 6:00 AM.  
If  or  appears under the temperature display, it means that both the heating and cooling  
setpoints are being adjusted. Tapping the increase or decrease key changes both the heat  
and cool setpoints by one degree. Press  
the setpoints.  
key after the desired setpoint is reached to verify  
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Changing and Holding Temperature Setting Indefinitely  
Hold Temp  
1
. Press Hold Temp key once.  
System  
Heat  
Setting  
2
. Press increase  or decrease  to change the tempera-  
ture setpoint, if desired.  
Fan  
Heat  
Auto  
NOTE: The display changes from the setpoint to the  
room temperature after approximately three  
seconds.  
M14565  
Press Hold Temp key once to display the thermostat in Hold  
mode. Example display shows temporary heat setting of 60°.  
Run  
Program  
Press Run Program key to cancel hold.  
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Changing Temperature Setting Until a Designated Day and Period (Vacation Hold)  
When setting Vacation Hold at any  
System  
Heat  
Setting  
thermostat, all thermostats automati-  
cally change to Vacation Hold except if  
a thermostat is already set to Hold.  
ZONING  
Hold for  
Wake  
Days  
Fan  
1
. Press Hold Temp key twice. Hold Temp  
Heat  
Auto  
M14833  
Press Hold Temp key twice to display the thermostat in Vacation  
mode. Example display shows temporary heat setting of 60°.  
IMPORTANT  
To cancel the Vacation Hold before the  
designated time, press Run Program key.  
System  
Heat  
Setting  
2
. Press Time  
number of days (1 to 255  
days) displays.  
or Time  
until the desired  
Hold for  
Days  
Fan  
TIME  
Wake  
Heat  
Auto  
M14834  
Press the Time  
or Time  
key to select the number of vacation  
days. Example display shows 18 vacation days.  
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Press Wake, Leave, Return or Sleep key to select the  
period the Hold ends.  
System  
Heat  
Setting  
Wake  
Leave  
Return  
Sleep  
Hold for  
Days  
Fan  
Return  
Heat  
Auto  
M14571  
th  
In this example, the Hold ends after the 18  
day at the beginning of the Return period.  
4
. Press increase  or decrease  to adjust the tempera-  
ture setting, if desired.  
System  
Heat  
Setting  
Hold for  
NOTE: Only the heating temperature is used when  
the System is set to Heat. Similarly, only the  
cooling temperature is used when the System  
is set to Cool. The thermostat uses both the  
heating and cooling temperatures when the  
System is set to Auto.  
Days  
Fan  
Return  
Heat  
Auto  
M14572  
Press increase or decrease key to select  
a new Hold temperature. Example display  
shows temporary heat setting of 55°.  
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Auto changeover is not an available feature.  
ZONING  
Heat/Cool  
Settings  
5. Press Heat/Cool Settings key to change between heat and cool settings.  
6
. Press increase  or decrease  to adjust the temperature setting, if desired (for example, if cool is set at  
84°, cooling equipment operates when the room temperature is above 84°F).  
To cancel the Vacation Hold before the designated time, press Run Program key at each thermostat.  
ZONING  
Pressed the wrong key?  
Want to start over?  
Don’t worry!  
You can always press  
to return display to normal.  
Run  
Program  
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Using the  
(Information) Key  
System  
Em Heat  
AM  
The  
(information) key provides information at your  
fingertips. The sequence of key presses is:  
Fan  
Tue  
Wake  
Room  
Outdoor temperature (if equipped).  
Current setpoint of mode in use (Heat or Cool).  
Setpoint of mode not currently in use.  
Filter status.  
DST  
Auto  
INFORMATION KEY  
M17757  
If the filter status is expired, refer to Filter Indicator section, the sequence of  
key presses is:  
Filter status.  
Outdoor temperature (if equipped).  
Current setpoint of mode in use (Heat or Cool).  
Setpoint of mode not currently in use.  
Displaying Outdoor Temperature  
Press  
key once to display outdoor  
Outdoor  
temperature (if equipped).  
INFORMATION KEY  
M14835  
If the filter status is expired, press  
key twice to display outdoor temperature.  
See Filter Indicator section for instructions  
on resetting the filter indicator.  
Press  
key once to display the outdoor temperature.  
Example display shows outdoor temperature at 50°.  
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Displaying Current Settings  
Press  
key twice to check the current temperature setpoint. Press  
key three times to check the tempera-  
ture setpoint of the mode not currently in use.  
Without outdoor temperature sensor, press  
twice for opposite setpoint.  
key once to display current setpoint; press  
key  
If the filter status is expired, press  
key  
three times to check current temperature  
setpoint, if equipped with outdoor sensor.  
Cool  
M17761  
Press  
key twice to display current setpoint.  
Example display shows cooling setpoint of 75°.  
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Filter Indicator  
Your thermostat monitors the time the fan is running  
and lets you know when to replace the filter, based  
on the number of fan run-time days you select. Upon  
expiration, the thermostat displays “Filter” and the  
green LED lights (on the top right of the thermostat).  
System  
Em Heat  
AM  
Filter  
Tue  
Wake  
Fan  
Room  
DST  
Auto  
One fan run-time day equals twenty-four  
hours of fan run time. For example, if the  
fan is on only one-third of the time each  
day, it takes three days to deduct one  
fan run-time day.  
FILTER EXPIRATION INDICATOR  
M17760  
Setting  
Setting or Resetting Filter Indicator  
Your thermostat comes preset to a 30-day setting. To change  
this setting, or reset after filter expiration:  
Filter  
Days  
1. Press Filter key to enter the Filter mode.  
Filter  
M14577  
Press the Filter key to display filter information.  
Example display shows current fan run time set  
to 30 days with the filter set to expire in 5 days.  
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2
. Press and hold the Filter key for at least three seconds  
Setting  
to reset the fan run time.  
Filter  
Filter  
Days  
M17762A  
Hold down the Filter key to reset the counter.  
3
. Press Time  
or Time  
until the desired number of days displays  
(0, 15, 30, 60, 90, or 120 ).  
TIME  
Run  
Program  
4. Press Run Program key to return to normal operation.  
IMPORTANT  
To track the time the fan is running, you must select a setting other than 0 (0 means off). If the setting is  
days, the display always shows “0 Days; 0 Setting” when the Filter key is pressed.  
0
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CHECK  
FILTER  
LED Indicators  
Two light emitting diode (LED) indicators are located on the upper  
right side of the thermostat. The LED indicators are clear until  
lighted. When the right filter expiration LED indicator lights  
(RED) LED  
(GREEN) LED  
(
green), see the Filter Indication section; when the heat pump  
check LED indicator lights (red), see the Troubleshooting section.  
The Check LED indicates a failure detected with  
the heat pump. Switch the thermostat to Em. Ht.  
and contact your heat pump service company for  
assistance. Heating with Em.Ht. may be more  
expensive so act quickly.  
HEAT PUMP  
M13375  
The LED indicators light on all thermostats.  
ZONING  
System  
Heat  
Temporary  
AM  
Remote OverrideTemperature Indicator  
The thermostat can communicate with a variety of system  
controllers. If the temperature was overridden remotely, a () is  
displayed and “Temporary” flashes.  
Fan  
Mon  
Heat  
Auto  
M17763  
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SETTING THE CLOCK  
Setting Current Day and Time  
Seting the time and day at one thermostat automatically sets the time and day on all thermostats.  
ZONING  
IMPORTANT  
Always press the keys with your fingertip or similar blunt tool. Sharp instruments like pens and pencil  
points can damage the keyboard.  
On initial power up or after an extended power loss, “1:00 PM”  
flashes on the display until a key is pressed.  
Set Day/Time  
1
. Press Set Current Day/Time key. Set Current  
Day/Time  
PM  
Mon  
M14580  
Press Set Current Day/Time key to  
show information displayed.  
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2
. Press Day key until the current day displays.  
Day  
Set Day/Time  
PM  
Mon = Monday, Tue = Tuesday, Wed = Wednesday,  
Thu = Thursday, Fri = Friday, Sat = Saturday,  
Sun = Sunday.  
Tue  
M14581  
Press Day key to set the current day.  
Example display shows Tuesday.  
3. Press Time  
or Time  
key until the current time displays.  
TIME  
Tap the Set Current Day/Time key to advance  
Set Day/Time  
AM  
the time in one-hour increments. Set Current  
Day/Time  
Tue  
4. Press Run Program key to return to normal operation.  
Run  
Program  
M14582  
Press Time key to set the current time.  
or Time  
Example display shows 8:15 AM.  
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Daylight Saving Time  
Set Day/Time  
AM  
NOTE: If the current time is Daylight Saving Time, press  
Daylight Time key to display “DST.” Daylight  
Time  
Tue  
DST  
M14583  
Press Daylight Time key to set Daylight Saving Time.  
Pressing Daylight Time key more than once  
within a five minute period scrolls you through  
various time options (example: one hour  
earlier or later with or without DST). Pressing  
Daylight Time key six times in a five minute  
period returns you to your original setting.  
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PROGRAMMING YOUR THERMOSTAT  
7
-Day Program and Operation  
Your thermostat is 7-day programmable. 7-day programming means you can set your thermostat for four periods  
Wake, Leave, Return and Sleep) and up to eight temperatures (four Heat and four Cool) for each day of the  
(
week. Each day can be the same or different.  
Program Periods:  
WAKE  
LEAVE  
The program period when you want the house at a comfortable temperature when you get up and  
while you get ready for work or school. (This is a higher temperature during the heating season and a  
cooler temperature during the cooling season.)  
The program period you can set for an energy saving temperature while you are away at work or  
school. (This is a lower temperature during heating season, and higher temperature during cooling  
season) and it follows the WAKE period.  
RETURN The program period when you want the house at a comfortable temperature for activities before  
bedtime. (This is a higher temperature during the heating season and a cooler temperature during the  
cooling season) and it follows the energy-saving LEAVE period.  
SLEEP  
The program period you set for an energy-saving temperature while you are sleeping. This is a lower  
temperature during heating season, and higher temperature during cooling season) and it follows the  
RETURN period.  
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7
-Day Preprogrammed Schedule  
Your thermostat is preprogrammed with the schedule shown in Table 1 (same schedule for all days of the week).  
You may keep this schedule or develop your own. Before starting the programming procedure, use Table 2 to  
plan your schedule.  
Instructions:  
1
2
3
. Write the time you want for each program period.  
. Write the heating and cooling temperatures you want for each period.  
. Draw a circle around the fan operation you desire for each period.  
Table 1. 7-Day Preprogrammed Schedule.  
WAKE  
6:00 AM  
LEAVE  
8:00 AM  
RETURN  
6:00 PM  
SLEEP  
10:00 PM  
ALL DAYS  
TIME  
FAN  
TIME  
FAN  
TIME  
FAN  
TIME  
FAN  
AUTO  
AUTO  
AUTO  
AUTO  
H 70 (21)  
C 78 (2.5)  
H 62 (16.5)  
C 85 (29.5) H 70 (21)  
C 78 (25.5) H 62 (16.5)  
C 82 (28)  
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Customizing Your Own 7-Day Schedule  
Table 2. Your 7-Day Schedule.  
WAKE  
LEAVE  
RETURN  
SLEEP  
SUNDAY  
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
AUTO  
C
ON  
ON  
ON  
ON  
ON  
ON  
ON  
AUTO  
C
ON  
ON  
ON  
ON  
ON  
ON  
ON  
AUTO  
C
ON  
ON  
ON  
ON  
ON  
ON  
ON  
AUTO  
C
ON  
ON  
ON  
ON  
ON  
ON  
ON  
MONDAY  
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
AUTO  
C
AUTO  
C
AUTO  
C
AUTO  
C
TUESDAY  
WEDNESDAY  
THURSDAY  
FRIDAY  
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
AUTO  
C
AUTO  
C
AUTO  
C
AUTO  
C
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
AUTO  
C
AUTO  
C
AUTO  
C
AUTO  
C
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
AUTO  
C
AUTO  
C
AUTO  
C
AUTO  
C
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
AUTO  
C
AUTO  
C
AUTO  
C
AUTO  
C
SATURDAY  
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
TIME  
FAN  
H
AUTO  
C
AUTO  
C
AUTO  
C
AUTO  
C
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About Power Outages…  
Don’t worry! Your thermostat retains the schedule (preprogrammed or your own) for the life of the  
product. The time and day information is retained for a minimum of twenty minutes during a  
power outage. After a longer power outage, you may need to set the current time and day (“1:00  
PM” flashes on the display), but the schedule is retained.  
Programming the First Day  
To modify the preprogrammed schedule, start by programming the Wake time and temperature and fan operation  
for any one day.  
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1. Press the Wake key.  
Wake  
System  
Heat  
Set Program  
Setting  
AM  
Fan  
Tue  
Wake  
Heat  
Auto  
M14586  
Press the Wake key to enter the program mode. Example  
display shows 6:00 AM on Tuesday with Heat set to 70°F.  
2. Press Day key until the desired day displays. Day  
System  
Heat  
Set Program  
Setting  
AM  
Fan  
Mon  
Wake  
Heat  
Auto  
M14588  
Press Day key to select the day to program. Example  
display shows Monday is selected and ready to program.  
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3
. Press Time  
time displays.  
or Time  
key until the desired Wake  
System  
Heat  
Set Program  
Setting  
AM  
TIME  
Fan  
Mon  
Wake  
The program times are in fifteen-minute intervals;  
for example, 8:00, 8:15, 8:30.  
Heat  
Auto  
M14589  
Press the Time  
or Time  
key to select the  
time the Wake period will begin. Example display  
shows the Wake period will begin at 6:30 AM.  
4
. Press increase  or decrease  key until the desired  
Wake temperature displays.  
System  
Heat  
Set Program  
Setting  
AM  
The setpoint temperature range is 40 to 90°F  
Fan  
(4 to 32°C) for heating and 55 to 99°F  
13 to 37°C) for cooling.  
Mon  
Wake  
(
Heat  
Auto  
M14590  
Press increase or decrease key to select the  
temperature for the Wake period. Example display  
shows the heating Wake period set for 68°.  
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5
. Press Fan key to modify fan operation. Selecting Auto means the fan runs only when the  
heating or cooling equipment is operating. Selecting On means the fan runs continuously  
for the entire schedule period.  
Fan  
6
. Press Heat/Cool Settings key to make selections for the opposite system setting (either  
Heat or Cool).  
Heat/Cool  
Settings  
System  
Heat  
Set Program  
Setting  
AM  
Fan  
Mon  
Wake  
Cool  
Auto  
M14591  
Press Heat/Cool Settings key to select the cooling system  
(
if you previously set the heating temperature). The  
current setting displays. Example display shows  
the cooling system previously set for 78°.  
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7
. Press increase  or decrease  key until the desired  
temperature setpoint displays.  
System  
Heat  
Set Program  
Setting  
Cool  
AM  
Fan  
Mon  
Wake  
Auto  
M14592  
Press increase or decrease to select the  
cooling Wake temperature. Example display  
shows the cooling Wake period set for 76°.  
8
. Press Leave, Return or Sleep and repeat steps 3 through 6 to program the entire day. The day (first day of  
a 7-day schedule) is now programmed.  
Leave  
Return  
Sleep  
IMPORTANT  
Repeat steps 1 through 7 for each day of the week that has a different schedule from the first day. Or  
refer to Copying a Day section to copy any programmed day to another day.  
9. Press Run Program key to return to normal operation.  
Run  
Program  
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Copying a Day  
The thermostat must be in the program mode to use the copy feature. Go to step 2 if the thermostat is  
already in the program mode (set program displays in the upper left corner).  
1
. Press Wake, Leave, Return or Sleep key to enter program mode. Wake  
Leave  
Return  
Sleep  
2
. Press Day key to select the day to copy from. Day  
Set Program  
Setting  
System  
Heat  
AM  
Fan  
Mon  
Wake  
Heat  
Auto  
M14590  
Press Day key to select the day schedule to copy.  
Example display shows the thermostat in program  
mode with Monday ready to be copied.  
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3. Press Copy key.  
Copy  
Mon  
M14594  
Press Copy key to copy a day schedule into memory. Example  
display shows Monday schedule was copied into memory.  
4. Press Day key until the day to be copied to is displayed.  
Day  
Mon  
Wed  
M14595  
Press Day key again to select the day to copy to.  
Example display shows Monday and Wednesday.  
Because Monday was already selected, Monday  
schedule will be copied to Wednesday.  
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5. Press Copy key.  
Copy  
NOTE: “donE” displays for two seconds before the  
normal display returns.  
M14596  
Press the Copy key again to complete the copy command.  
Example display shows “donE”. Monday schedule was  
successfully copied to Wednesday (Monday and Wednesday  
now have the same schedule).  
6. Repeat steps, as necessary, for all the periods and days desired.  
7. Press Run Program key to return to normal operation.  
Run  
Program  
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Clearing a Program Period  
The thermostat must be in the program mode  
to use the clear feature. Go to step 2 if the thermo-  
stat is already in the program mode  
System  
Heat  
Set Program  
Setting  
AM  
(Set Program displays in upper left corner).  
Fan  
Mon  
On  
Leave  
Heat  
1. Press Leave, Return or Sleep key to enter program  
M14597  
mode.  
Leave  
Return  
Sleep  
Press Leave, Return, or Sleep to enter the  
program mode. Example display shows 8:00 AM on  
Monday in the Leave period with Heat set for 62° .  
2. Press Day key until the desired day displays. Day  
System  
Heat  
Set Program  
Setting  
AM  
Fan  
Sat  
On  
Leave  
Heat  
M14598  
Press Day key to select the day to begin clearing  
the periods. Example display shows Saturday is selected  
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3
. Press and hold Leave, Return or Sleep key until the start  
time and temperature setting are cleared (approximately  
three seconds).  
Set Program  
Setting  
Leave  
Return  
Sleep  
Sat  
NOTE: Wake cannot be cleared.  
Leave  
Heat  
M14599  
Press and hold Leave, Return or Sleep key to  
clear the period for that day. Example display  
shows Saturday Leave period cleared.  
You do not have to program a replacement time for the remaining periods; for example, Wake and  
Sleep. If you clear only the Leave and Return periods for Saturday (or any day), the thermostat  
remains in the Wake period for all of Saturday until the Sleep period.  
4. Repeat steps, as necessary, for all the periods to be cleared.  
5. Press Run Program key to return to normal operation.  
Run  
Program  
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TROUBLESHOOTING  
Symptom  
Display does not come  
on.  
Possible Cause  
Thermostat is not being powered.  
Action  
Check if the thermostat is mounted and latched on the wallplate—  
mount and latch the thermostat on the wallplate.  
Check if the circuit breaker is tripped—reset the circuit breaker.  
Check if the fuse at the fuse box is blown—replace the fuse.  
Check if the system switch at the equipment is in the Off  
position—set to the On position.  
Temperature setting does The upper or lower temperature  
Check that the temperature setpoints are:  
not change (Example:  
cannot set the heating  
higher or the cooling  
lower).  
limits were reached.  
Heating: 40 to 90°F (4 to 32°C)  
Cooling: 55 to 99°F (13 to 37°C).  
Heating does not come  
on.  
No power to the thermostat.  
System selection is not set to Heat. Check if the circuit breaker is tripped—reset the circuit breaker.  
Check that setpoint is above room temperature.  
Heating setpoint is below room  
temperature.  
Check if the fuse at your fuse box is blown—replace the fuse.  
Check if the System switch at the equipment is in the Off  
position—set to the On position.  
Wait five minutes for the system to respond (thermostat displays  
Wait”).  
Set System selection to Heat.  
continued  
69-1332—3  
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Troubleshooting (Cont)  
Symptom  
Possible Cause  
Action  
Check that setpoint is below room temperature.  
Check if the circuit breaker is tripped—reset the circuit  
breaker.  
Check if the fuse at the fuse box is blown—replace the fuse.  
Check if the System switch at the equipment is in the Off  
position—set to the On position.  
Cooling does not come  
on.  
No power to the thermostat.  
System selection is not set to  
Cool. Cooling setpoint is above  
room temperature.  
Wait five minutes for the system to respond (thermostat  
displays “ Wait”).  
Set System selection to Cool.  
System on indicator—  
Heating/cooling equipment turns  
Wait a minute after seeing the  
registers.  
or  
and then check the  
for heat,  
for cool— on the fan when the equipment  
is lit, but no warm or cool has reached the preset time or  
air is coming from the  
registers.  
temperature.  
Filter expired.  
“Filter” is displayed and  
Refer to the Filter Indicator section.  
the green LED is lit.  
The red LED is lit.  
The heat pump signaled the  
thermostat to indicate a problem.  
Move the System switch to Em.Ht setting (multistage heat  
pump only). See Heat Pump Operating Instructions or call  
your local heat pump dealer for assistance.  
continued  
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Troubleshooting (Cont)  
Symptom  
Possible Cause  
Action  
Outdoor temperature  
not displayed or is  
incorrect.  
Installer did not activate this  
option.  
Outdoor sensor is connected  
incorrectly.  
Contact installer or service technician.  
Filter expired.  
Press  
key twice for outdoor temperature when filter ex-  
piration shows on display.Refer to the Filter Indicator section.  
“no com” is displayed.  
The thermostat is unable to  
communicate with the  
equipment interface module  
located at the furnace.  
Turn the power off and then on to your furnace. If the problem  
persists, call your local heating and air conditioning dealer for  
assistance.  
is flashing and there is  
no air coming from the  
register.  
When using the thermostat in  
zoning applications, the  
Wait until all other zone heat or cool cycles are complete.  
thermostat must wait for all  
other zones to end their call for  
heat or cool before the fan  
request in this zone is honored.  
Adaptive Intelligent  
Heat or cool turns on  
before programmed  
time.  
Adaptive Intelligent Recovery™ control brings the heat or cool  
on early to meet the temperature set for the programmed  
period. See Adaptive Intelligent Recovery™ control section.  
To disable Adaptive Intelligent Recovery™ control, contact  
your l ocal Heating and Air Conditioning contractor.  
Recovery™ control is on.  
44  
69-1332—3  
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 one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the product is defective or malfunctions,  
Honeywell shall repair or replace it (at Honeywell’s option) within a reasonable period of time.  
If the product is defective,  
(i) return it, with a bill of sale or other dated proof of purchase, to the retailer from which you purchased it, or  
(ii) package it carefully, along with proof of purchase (including date of purchase) and a short description of the malfunction, and mail it, postage  
prepaid, to the following address:  
Honeywell Return Goods  
Dock 4 MN10-3860  
1885 Douglas Drive North  
Golden Valley, MN 55422  
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.  
45  
69-1332—3  
Warranty (Cont)  
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 ONE 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 our Honeywell Customer Relations, 1985 Douglas Drive North, Golden Valley, MN  
55422. In Canada, write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.  
46  
69-1332—3  
CUSTOMER ASSISTANCE  
After reading this guide, if you have any questions about the operation of your thermostat, please visit the  
Honeywell website at www.honeywell.com/yourhome. For service, contact your local heating and cooling  
contractor.  
47  
69-1332—3  
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Automation and Control Solutions  
Honeywell  
Automation and Control Solutions  
Honeywell Limited-Honeywell Limitée  
35 Dynamic Drive  
1
985 Douglas Drive North  
Golden Valley, MN 55422  
Scarborough, Ontario  
M1V 4Z9  
Printed in U.S.A. on recycled  
paper containing at least 10%  
post-consumer paper fibers.  
69-1332—3 G.H. Rev. 12-01  
www.honeywell.com/yourhome  

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