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T8001F, T8024F Flush Mount  
Programmable Thermostat  
OWNER’S GUIDE  
69-1464-1  
Welcome to the world of comfort and energy  
savings with your new Honeywell programmable  
thermostat.  
Features  
Program up to four time periods with  
temperature settings to complement  
your lifestyle.  
Your new programmable thermostat is designed  
to provide you with reliable, precise temperature  
control. When you follow the simple program-  
ming instructions in this manual, your thermostat  
automatically controls the temperature in your  
home, saving energy and allowing you to awake  
Set different schedules for weekdays  
and weekend.  
Programs permanently held in nonvola-  
tile memory in event of power failure.  
Indefinite temperature hold.  
(or return home) to a comfortable level of heating  
Preprogrammed for your convenience.  
or air conditioning.  
Direct questions concerning the operation of this  
thermostat to Honeywell Customer Assistance at  
1
-800-468-1502, Monday-Friday, 7:00 a.m.-  
5:30 p.m., Central time.  
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Contents  
Features .......................................................................................................................................... 2  
Key Locations and Descriptions ...................................................................................................... 4  
Planning Program Schedule ........................................................................................................... 5  
Program Schedule...................................................................................................................... 6  
Programming Thermostat ............................................................................................................... 7  
Setting Current Time and Day .................................................................................................... 8  
Setting Weekday Program .......................................................................................................... 9  
Setting Weekend Program ......................................................................................................... 10  
Setting Temporary Temperature Hold ......................................................................................... 13  
Setting Indefinite Temperature Hold ........................................................................................... 13  
Operating Thermostat ..................................................................................................................... 13  
Setting SYSTEM and FAN Switches .......................................................................................... 13  
Minimum Off-Timing ........................................................................................................................ 14  
Troubleshooting ............................................................................................................................... 15  
Warranty.......................................................................................................................................... 18  
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Key Locations and Descriptions  
HOLD KEY  
SET TEMPORARY TEMPERATURE HOLD.  
INCREASE KEY  
PROGRAM TIME AND TEMPERATURE.  
SET TEMPORARY TEMPERATURE HOLD.  
PM  
Hold  
Select  
TUE  
SELECT KEY  
CURRENT SETPOINT.  
FAN  
SWITCH  
• CHANGE DAY AND TIME.  
• PROGRAM SELECTIONS.  
Fan  
Auto On  
System  
Cool Off  
Heat  
SYSTEM SWITCH  
DECREASE  
KEY  
PROGRAM TIME AND TEMPERATURE.  
SET TEMPORARY TEMPERATURE HOLD.  
M18613  
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Table 1. Preprogrammed Time  
and Temperature Settings.  
Planning Program Schedule  
The thermostat display shows day, time,  
program period, and temperature.  
Heat  
Setpoint  
Cool  
Setpoint  
Period  
Time  
Wake  
6:00 AM  
70°F  
21°C)  
78°F  
(26°C)  
The thermostat can be set for four time  
periods per day for weekdays and weekend.  
(
Leave 8:00 AM  
Return 6:00 PM  
Sleep 10:00PM  
62°F  
17°C)  
85°F  
(29°C)  
(
Before programming the thermostat, you can  
use the program schedule to plan your  
program.  
70°F  
(21°C)  
78°F  
(26°C)  
62°F  
17°C)  
82°F  
(28°C)  
Fill in the weekday and weekend times and  
temperatures you desire. If you decide not to  
program the thermostat, it uses the  
preprogrammed time and temperature settings  
in Table 1.  
(
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Program Schedule  
Weekday  
Start Time  
Heating Temperature  
Cooling Temperature  
Wake  
Leave  
Return  
Sleep  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
Weekend  
Start Time  
Heating Temperature  
Cooling Temperature  
Wake  
Leave  
Return  
Sleep  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
________  
Wake and Return start times should include extra lead time, based on outside temperature and  
equipment response time, to give your equipment a head start to heat or cool the house. The  
temperatures cannot be set any higher than 99°F (37°C) or any lower than 40°F (4°C).  
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time, to give the equipment a head start to  
heat or cool the house before you get up.  
Programming Thermostat  
(
This will be a higher temperature during  
heating season, and a lower temperature  
during cooling season.)  
The thermostat is flexible and can be program-  
med for different schedules for weekdays and the  
weekend to meet your lifestyle needs.  
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.)  
Use the personal Program Schedule for planning  
your time and temperature settings for various  
times of the day.  
Four time periods are available during weekdays  
and the weekend—Wake, Leave, Return, 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, depending on the outside temp-  
erature and your equipment response time,  
to give the equipment a head start to heat  
or cool the house before you arrive home.  
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 temp-  
erature and your equipment response  
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Sleep is the time period you can set for an  
energy-saving temperature while you are  
sleeping. (For more comfortable sleep-  
ing, some people choose not to raise the  
cool temperature during the night.)  
While setting the current time, the word SET is  
displayed.  
2. To set day of week, press Select again.  
Press or ▲  
SET  
to set current  
day.  
IMPORTANT  
Always press the keys with your  
fingertip or similar blunt tool. Sharp  
instruments like pens and pencil  
points can damage the keyboard.  
M18534  
To use the preprogrammed time and tempera-  
ture (see Table 1), press Hold to exit the  
programming mode.  
Setting Current Time and Day  
1
. To set current time, press Select twice.  
Press or ▲  
to set current  
SET  
PM  
time.  
M12591A  
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. Leave  
Setting Weekday Program  
a. Press Select. Press  or  to set  
Slide the SYSTEM switch to the position, Heat  
or Cool, you want to program. A flame (heat-  
Leave  
time.  
SET  
ing) or a snowflake  
(cooling) appears in the  
right side of the display, when setting the  
program temperature.  
M18566  
3
. Wake  
b. Press Select. Press  or  to set  
a. Press Select. Press  or  to set  
Leave  
SET  
Wake  
time.  
SET  
temp-  
erature.  
M12627B  
M18570  
5. Return  
b. Press Select. Press  or  to set  
a. Press Select. Press  or  to set  
Wake  
SET  
Return  
time.  
SET  
temp-  
erature.  
M12625C  
M18567  
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b. Press Select. Press  or  to set  
Setting Weekend Program  
. Wake  
a. Press Select. Press  or  to set  
Return  
temp-  
SET  
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erature.  
Wake  
time.  
SET  
M12629B  
6. Sleep  
a. Press Select. Press  or  to set  
M18569  
Sleep  
time.  
SET  
b. Press Select. Press  or  to set  
Wake  
SET  
temp-  
M18568  
erature.  
b. Press Select. Press  or  to set  
M12633C  
Sleep  
SET  
temp-  
erature.  
M12631C  
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. Leave  
b. Press Select. Press  or  to set  
a. Press Select. Press  or  to set  
Return  
SET  
Leave  
time.  
SET  
temp-  
erature.  
M12637B  
10. Sleep  
M18550  
a. Press Select. Press  or  to set  
b. Press Select. Press  or  to set  
Sleep  
time.  
SET  
Leave  
SET  
temp-  
erature.  
M18554  
M12635B  
9
. Return  
b. Press Select. Press  or  to set  
Sleep  
a. Press Select. Press  or  to set  
SET  
Return  
time.  
SET  
temp-  
erature.  
M12639C  
M18552  
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1
1. Press Select. End is displayed. Program-  
Setting Indefinite Temperature Hold  
The Hold key allows you to indefinitely hold a  
temperature. When Hold is active, the letters  
Hld are displayed continuously. Hold can be  
canceled by pressing the Hold key again.  
ming is complete. The thermostat reverts  
to displaying  
SET  
the current  
day time and  
temperature in  
five seconds.  
1. Press Hold  
M18556  
Setting Temporary Temperature Hold  
2
. Press  or  key to set indefinite  
temperature  
setting.  
1
. Press  or  key to set a temporary  
temperature  
TEMPORARY  
setting.  
PM  
WED  
M12641A  
M12640A  
NOTE: The temporary temperature setting  
remains in effect until the next program  
period. To cancel, press Hold twice.  
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Operating Thermostat  
FAN settings:  
Auto: Fan operates with equipment.  
On: Fan operates continuously.  
Setting SYSTEM and FAN Switches  
Use the SYSTEM and FAN switches to control  
thermostat operation.  
Slide the FAN switch in the lower left corner of  
the thermostat to select the desired fan setting.  
SYSTEM settings:  
Cool: The thermostat controls the cooling.  
Off: Both the heating and cooling are off.  
Heat: The thermostat controls the heating.  
Heat and Cool Indicators:  
Indicates a call for heat.  
Indicates a call for cool.  
Slide the SYSTEM switch in the lower right  
corner of the thermostat to select the desired  
system setting.  
NOTE: In the programming mode, the  
and  
indicate system setting.  
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Minimum Off-Timing  
The thermostat minimum off-timer assures that  
the compressor does not come on again for at  
least five minutes after it turns off. The minimum  
off-timer is triggered when the compressor turns  
off and when the SYSTEM switch position is  
changed. If the compressor turns off when the  
setpoint is changed, the minimum off-timer is  
triggered. Power interruption and power  
restoration also trigger the minimum off-timer.  
The minimum off-timer operates in cooling on  
the T8001F and T8024F. A flashing snowflake  
indicates the minimum off-time is in effect.  
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Troubleshooting  
Symptom  
Action  
Display does not come on.  
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 is blown—replace the fuse.  
Check if the switch at the equipment is in the Off  
position—set to the On position.  
Temperature settings do not  
change (example: cannot set the  
heating higher or the cooling  
lower).  
Check that the temperature setpoints are: between 40  
to 99°F (4 to 37°C).  
continued  
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Troubleshooting (Continued).  
Symptom  
Action  
Heating does not come on.  
Check if the circuit breaker is tripped—reset the circuit  
breaker.  
Check if the fuse is blown—replace the fuse.  
Check if the switch at the equipment is in the Off  
position—set to On position.  
Wait five minutes for the system to respond.  
Set SYSTEM switch to Heat.  
Cooling does not come on.  
Check if the circuit breaker is tripped—reset the circuit  
breaker.  
Check if the fuse is blown—replace the fuse.  
Check if the switch at the equipment is in the Off  
position—set to On position.  
Wait five minutes for the system to respond.  
Set SYSTEM switch to Cool.  
continued  
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Troubleshooting (Continued).  
Symptom  
Action  
System on indicator  
Wait a couple minutes after seeing the flame or  
snowflake and then check the registers.  
or  
is lit, but no warm or  
cool air is coming from the  
registers.  
System on indicator  
Minimum off-timer is in effect. Wait five minutes until the  
minimum off-timer is complete.  
is flashing.  
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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.  
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Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above. HONEY-  
WELL 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 any questions concerning this warranty, please write Honeywell Customer Relations, 1985 Douglas  
Drive North, MN10-1461, Golden Valley, MN 55422 or call 1-800-468-1502, Monday-Friday, 7:00 a.m. to 5:30  
p.m., Central time. In Canada, write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée,  
35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.  
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Home and Building Control  
Home and Building Control  
Honeywell Limited-Honeywell Limitée  
35 Dynamic Drive  
Honeywell  
1985 Douglas Drive North  
Golden Valley, MN 55422  
Scarborough, Ontario  
Printed in U.S.A. on recycled  
paper containing at least 10%  
post-consumer paper fibers.  
M1V 4Z9  
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9-1464-1 9-01 G.H.  
Copyright © 2000 Honeywell All Rights Reserved  
U.S. Registered Trademark  
®
www.honeywell.com/yourhome/