Electronic
Programmable Thermostat
Owner’s Manual
69-0862-2
J.S. • Rev. 5-96
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Programming Your Thermostat
When batteries are installed, your thermostat
can be programmed in your hand before it is
installed or after it is mounted on the wall. For
instructions on installing or replacing the
batteries, refer to the Maintaining Your Thermo-
stat section.
Refer to the personal Program Schedule on
page 3 to program your time and temperature
settings for various times of the day.
Four time periods are available during
weekdays — WAKE, LEAVE, RETURN, and
SLEEP. During weekends, only the WAKE and
SLEEP time periods are available. View these
periods individually on the display when you
press the Set Schedule key.
WAKE is the time the thermostat turns on
the heating/cooling equipment after an
energy saving period. When deciding
what time to set for your WAKE period,
include extra lead time, depending on
the outside temperature and your
furnace response time, to give the
furnace a head start to heat the house
before you get up. (This will be a higher
temperature during heating season, and
a lower temperature during cooling
season.)
LEAVE is the time period you can set for
an energy-saving temperature while you
are away at work or school. (This will be
a lower temperature during heating
season, and a higher temperature
during cooling season.)
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69-0862—2
Fill in the times and temperatures you desire
for weekdays and weekends. If you decide not
to program the thermostat, it automatically
controls heating at 68°F (20°C), and cooling at
78°F (26°C), 24 hours a day. Also, you do not
need to enter a time and temperature program
for all periods if your schedule does not require
it. For example, a house that is occupied during
weekdays would only require programs for
WAKE and SLEEP.
RETURN is the time the thermostat turns
on the heating/cooling equipment after
an energy saving period. When deciding
what time to set for your RETURN
period, include extra lead time, depend-
ing on the outside temperature and your
furnace response time, to give the
furnace a head start to heat the house
before you arrive home.
SLEEP is the time period you can set for
an energy-saving temperature while you
are sleeping. (For more comfortable
sleeping, some people choose not to
raise the cool temperature during the
night.)
When pressing the keys, use the ball of your
finger or a soft pencil eraser.
NOTE: Use of sharp fingernails or pencil
points can damage the keypad.
You will set one schedule for weekdays and
another for weekends because your require-
ments will probably be different for each.
If you make an error at any time during
programming, just press the Run Program key,
and continue again at the last step.
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69-0862—2
Program Schedule
HEATING PROGRAM SCHEDULE
Heating Temperature
2
2
Weekdays
Start Time
Cooling Temperature
WAKE
LEAVE
RETURN
SLEEP
__________
__________
__________
__________
____________________
____________________
____________________
____________________
____________________
____________________
____________________
____________________
1
1
Weekends
WAKE
__________
__________
____________________
____________________
____________________
____________________
1
SLEEP
1
2
WAKE and RETURN start times should include extra lead time, based on outside temperature
and furnace response time, to give your furnace a head start to heat the house.
The temperatures cannot be set higher than 88°F (31°C) or lower than 45°F (7°C).
NOTE: If you decide not to program the thermostat, it will automatically control heating at 68°F
(20°C), and cooling at 78°F (26°C), 24 hours a day. This guide can be used for program-
ming your new thermostat.
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69-0862—2
IMPORTANT
Batteries are required for operation and
Use Time keys to program WAKE time and
Temp keys to program WAKE temperature for
Mon-Fri. Repeat sequence for LEAVE, RE-
TURN, and SLEEP.
programming. When inserting batteries,
set the system switch to OFF. Remove
the battery door (on the thermostat left
side) using a coin at the bottom. See
Maintaining Your Thermostat section.
USE TO SET
WARMER TEMPERATURE
LCD DISPLAY
USE TO SET
TIME EARLIER
RUN
PROGRAM
KEY
SET CURRENT TIME/DAY
AM
To set the time, press and release the Set
Clock/Day key once. Press the Time keys until
the current time shows.
TU
LEAVE
To set the day, press and release the Set
Clock/Day key again. Press the Time keys until
the current day shows. Press the Run Program
key.
HOLD
TEMP
KEY
Cool Off Heat
Auto On
System
Fan
USE TO
SET CURRENT
DAY AND TIME
USE TO
SET COOLER
TEMPERATURE
USE TO SET
TIME LATER
HEATING PROGRAM
USE TO SET
PROGRAM PERIOD
With the system switch at HEAT, press and
release the Set Schedule key once. WAKE,
Mon-Fri, and SET appear on the display.
M8473
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69-0862—2
Press Set Schedule key until WAKE, SA SU
and SET appear on the display. Use Time keys
to program WAKE time and Temp keys to
program WAKE temperature for Sat-Sun.
Repeat the sequence for SLEEP.
COOLING PROGRAM
With system switch at COOL, follow the
same instructions as for the Heating Program.
After programming, adjust the fan and
system switches, as desired. Press and release
Run Program key to start the program.
Operating Your Thermostat
USING PROGRAMMING FEATURES
Temporarily Change temperature for
current period only—
Hold a temperature indefinitely—
Press Hold Temp key once. Press Temp
keys until display shows desired temperature.
Press Temp keys to set desired temperature. Press Run Program key once to return to the
The change cancels itself at the next scheduled
program change; to cancel sooner, press the
Run Program key.
program.
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69-0862—2
Check CurrentTemperature Setting—Press
Cancel a program—Press Set Schedule
Run Program key once. If using TEMPORARY key until the program to cancel shows. Pressing
CHANGE or HOLD features, pressing this key the two Time keys together cancels the
cancels your change.
program.
Check Programs—Press Set Schedule key
repeatedly to see each time and temperature.
Press Run Program key once to return to the
program.
Permanently Change a program—Repeat
the steps in the Heating Program or Cooling
Program sections, as applicable.
Return to the normal program or the starting
program—Press Run Program key once.
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69-0862—2
SETTING FAN SWITCH
HEAT: The thermostat controls the heating
system.
Fan switching positions are:
FAN AUTO: Normal setting for most
homes. A single-speed fan turns on
automatically with the air conditioner or
furnace. A two-speed fan usually runs
on high with the air conditioner and runs
on low with the furnace.
AM
TU
LEAVE
FAN ON: The fan runs continuously. Use
for improved air circulation during
special occasions or for more efficient
electronic air cleaning.
Cool Off Heat
Auto On
System
Fan
SETTING SYSTEM SWITCH
System switching positions control thermo-
stat operation as follows:
FAN SWITCH
SYSTEM
SWITCH
COOL: The thermostat controls the air
conditioning system.
M5783
OFF: Both the heating and air conditioning
systems are off.
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69-0862—2
As the batteries are running low, the bAt Lo
indicator flashes for one to two months before
the batteries run out completely. Replace the
batteries as soon as possible after the indicator
starts flashing.
Maintaining Your Thermostat
INSTALLING BATTERIES
IMPORTANT
Batteries must be installed for programming
and operation of the thermostat and heat-
ing/cooling system.
1. Purchase two AA alkaline batteries;
nonalkaline batteries do not last as long, and
can leak, causing damage to the thermostat or
wall surface. We recommend Energizer®
batteries.
2 Make sure the thermostat is set in the
OFF position.
M5781
3. Use a coin to remove the battery door.
4. Install the fresh batteries, making sure the
positive and negative terminals are oriented
correctly.
5. Replace the battery door.
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69-0862—2
If the batteries are not replaced sometime
during the flashing bAt Lo, the indicator
eventually stops flashing. bAt Lo stays on
without flashing, indicating the thermostat and
heating/cooling system stopped working and
the batteries are almost completely dead.
After the batteries are completely dead, the
bAt Lo indicator disappears, leaving a com-
pletely blank display.
INSTALL TWO AA ALKALINE
BATTERIES AS SHOWN
AM
TU
LEAVE
To remove, press down on left ends of
batteries. If the new batteries are installed
within 20 to 30 seconds of removing the old
ones, the thermostat does not have to be
reprogrammed. If the display is blank, the
batteries are dead or incorrectly installed, the
thermostat has to be reprogrammed. See
Programming Your Thermostat section for
instructions.
Cool Off Heat
Auto On
System
Fan
FAN SWITCH
SYSTEM
SWITCH
M5782
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69-0862—2
Troubleshooting Guide
IF…
THEN…
Display will not come on.
■ Set the system switch to OFF. Remove batteries. Insert
backward for at least five seconds to reset thermostat.
Correctly replace batteries. Display should come on.
■ Make sure batteries are fresh and installed correctly.
■ Gently clean battery contacts using a soft pencil eraser.
Do not use anything abrasive on the clips.
Temperature display will not go
lower than 45°F (7°C) or higher
than 88°F (31°C) during
programming.
■ The temperature setting limit is reached. The setting
range is 45°F to 88°F (7°C to 31°C).
Temperature change occurs at
the wrong times.
■ Check program times for the period in question. Be sure
that AM and PM indications are correct. Make sure the
current day and time are correct. Reprogram if neces-
sary.
Heating will not come on.
■ Check that switch on thermostat is set to HEAT. Allow a
minimum of five minutes for time-guard protection to
expire.
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69-0862—2
Heating will not come on.
(Continued)
■ Check the system fuse or circuit breaker and replace or
reset, if necessary.
■ If display is blank or displays bAt Lo, install fresh
batteries.
■ If temperature setting is higher than current temperature,
and SYSTEM ON indicator is lit, contact your local
dealer.
Cooling will not come on.
■ Check that switch on thermostat is set to COOL. Allow a
minimum of five minutes for time-guard protection to
expire.
■ Check the system fuse or circuit breaker and replace or
reset, if necessary.
■ If display is blank or displays bAt Lo, install fresh
batteries.
■ The thermostat has a built-in time delay on cooling. Allow
at least five minutes after changing the setting before the
air conditioner starts.
■ Make sure outdoor disconnect is engaged (on).
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69-0862—2
Cooling will not come on.
(Continued)
■ If temperature setting is lower than current temperature,
and SYSTEM ON indicator is lit, move system switch
from COOL to OFF for ten minutes. After ten minutes,
return switch to the COOL position. If the air conditioner
comes on, the compressor could have reached its high-
limit temperature protection and shut down. If air
conditioner does not come on after ten minutes and the
SYSTEM ON indicator is lit, contact your local dealer.
■ If 2- or 4-wire installation, verify that R-Rc jumper is
installed.
Too warm or too cool.
■ Press Run Program key to check the current tempera-
ture setting.
■ If desired, change the temperature setting. See Program-
ming Your Thermostat section.
SYSTEM ON indicator is lit, but
no heat is coming from the
registers.
■ Allow time for the furnace to heat up and the fan to come
on before checking for heat at the register.
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69-0862—2
Thermostat current
■ Check that the wiring hole in the wall behind the
wallplate was plugged with insulation to prevent
drafts that might adversely affect thermostat operation.
■ Be aware that it is normal for the current setting and
display temperature to differ on occasion.
temperature setting does not
match the display temperature
to within ± 1°.
■ During recovery from setback or setup, setting and
display temperatures can differ for up to 30 minutes after
the recovery period.
Incorrect temperature
showing on thermostat display.
■ The thermostat is factory-calibrated and cannot be
adjusted.
bAt Lo remains on display after
fresh batteries are installed.
■ Remove the batteries. Wait one hour. Install fresh
alkaline batteries.
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69-0862—2
NOTICE
This equipment is a Class B digital apparatus, which complies with Canadian Radio Interference
Regulations, CRC c.1374.
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69-0862—2
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69-0862—2
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69-0862—2
Limited One-Year Warranty
Honeywell warrants this product 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 detective or malfunctions, Honeywell shall
repair or replace it (at Honeywell’s option) within a reasonable period of time.
If the product is detective,
(I) return it, with a bill of sale or other dated proof-of-purchase, to the dealer or contractor 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 Inc.
Return Goods Department
1050 Berkshire Lane
Plymouth, MN 55441-4437
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 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 questions concerning this warranty, please write our Customer Assistance Center, Honeywell Inc., P.O. Box 524, Minneapolis, MN
55440-0524 or call 1-800-468-1502, Monday - Friday, 7:00 a.m. to 5:30 p.m., Central time.
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69-0862—2
Printed on recycled paper containing at
least 10% post-consumer paper fibers.
Printed in U.S.A.
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