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T8611M Deluxe Programmable  
Heat Pump Thermostats  
INSTALLATION INSTRUCTIONS  
APPLICATION  
The T8611M Deluxe Programmable Heat Pump Thermostat provides electronic control of 24 Vac single-zone two  
compressor or two speed heat pump systems with auxiliary heat. The T8611M can be configured to run a single  
compressor heat pump system. Refer to Table 1 for a general description of the thermostat. All T8611 thermostats  
require a common wire to supply power.  
Table 1. Description of T8611 Thermostats.  
Fan  
T8611  
Changeover  
System Selection  
Selection  
Comments  
M
Automatic  
Em Heat-Heat-Off-Cool-Auto  
On-Auto Down-selectable for single-compressor  
systems.  
3.  
Installer must be a trained, experienced service  
technician.  
MERCURY NOTICE  
4. After completing installation, use these instructions  
If this control is replacing a control that contains  
mercury in a sealed tube, do not place your old  
control in the trash. Dispose of properly.  
to check out the product operation.  
Location  
Contact your local waste management authority  
for instructions regarding recycling and the  
proper disposal of the old control.  
Install the thermostat about 5 ft (1.5m) above the floor in  
an area with good air circulation at average temperature.  
See Fig. 1.  
Do not install the thermostat where it can be affected by:  
—
—
—
—
—
drafts, or dead spots behind doors and in corners.  
hot or cold air from ducts.  
radiant heat from sun or appliances.  
concealed pipes and chimneys.  
unheated (uncooled) areas such as an outside wall  
behind the thermostat.  
INSTALLATION  
When Installing this Product...  
1
.
.
Read these instructions carefully. Failure to follow  
the instructions can damage the product or cause  
a hazardous condition.  
Check the ratings given in the instructions and on  
the product to make sure the product is suitable for  
your application.  
2
®
U.S. Registered Trademark  
Copyright © 2002 Honeywell •  
• All Rights Reserved  
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T8611M DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS  
NO  
YES  
NO  
5
FEET  
NO  
[
1.5 METERS]  
M10106  
Fig. 1. Typical location of thermostat.  
Wallplate Installation  
The thermostat can be mounted horizontally on the wall  
or on a 2 in. x 4 in. (50.8 mm x 101.6 mm) wiring box.  
Position wallplate horizontally on the wall or on a  
WALL  
WIRES  
THROUGH WALL  
2
in. x 4 in. (50.8 mm x 101.6 mm) wiring box.  
1.  
Position and level the wallplate (for appearance  
only). The thermostat will function properly even  
when not level.  
WALL  
ANCHORS (2)  
2
.
.
Use a pencil to mark the mounting holes.  
See Fig. 2.  
Remove the wallplate from the wall and drill two  
3
7
6 mm (3/16 inch) holes in the wall (if drywall) as  
marked. For firmer material such as plaster, drill  
two 5.56 mm (7/32 inch) holes. Gently tap anchors  
(
provided) into the drilled holes until flush with the  
MOUNTING  
HOLES  
MOUNTING  
SCREWS  
wall.  
4.  
Position the wallplate over the holes, pulling wires  
through the wiring opening.  
Loosely insert the mounting screws into the holes.  
Tighten mounting screws.  
5
6
.
.
M15044  
Fig. 2. Mounting the wallplate.  
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T8611M DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS  
WIRING  
All wiring must comply with local electrical codes and  
ordinances. Refer to Fig. 3 and 4 for typical hookups. A  
letter code is located near each terminal for identification.  
THERMOSTAT  
Y1  
OT  
OT  
W3 O/B  
G
C
E
L
R
X1  
X2  
2
CAUTION  
OUTDOOR  
TEMPERATURE  
SENSOR  
Electrical Shock Hazard.  
Can cause electrical shock or equipment  
damage.  
EM. HEAT  
RELAY  
EQUIPMENT  
MONITOR 2  
Disconnect power before wiring.  
3
1.  
Loosen the terminal screws on the wallplate and  
connect the system wires. See Fig. 5.  
COMPRESSOR  
CONTACTOR  
4
EQUIPMENT  
MONITOR  
OR DEFROST  
RESET  
IMPORTANT  
Use 18 gauge, color-coded thermostat cable for  
FAN  
RELAY  
proper wiring.  
CONTROL  
COOL/HEAT  
CHANGEOVER  
VALVE  
5
2.  
3.  
4.  
Securely tighten each terminal screw.  
Push excess wire back into the hole.  
Plug the hole with nonflammable insulation to  
prevent drafts from affecting the thermostat.  
1
AUX. HEAT  
RELAY  
L1  
(HOT)  
L2  
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND  
OVERLOAD PROTECTION AS REQUIRED.  
THERMOSTAT  
OT  
OT  
Y2 O/B  
G
Y1  
C
E
W3  
L
R
X1  
X2  
USE OUTDOOR SENSOR C7089B1000 AND CONFIGURE  
INSTALLER SETUP NUMBER 24 TO 1.  
2
BE SURE INSTALLER SETUP NUMBER 3 IS SET TO 1 FOR  
SINGLE COMPRESSOR SYSTEMS.  
OUTDOOR  
TEMPERATURE  
SENSOR  
4
5
WIRE EQUIPMENT MONITOR OR DEFROST RESET CONTROL  
PER MANUFACTURER INSTRUCTIONS.  
EQUIPMENT  
MONITOR 2  
EM. HEAT  
RELAY  
CONFIGURE IN INSTALLER SETUP.  
M13290A  
AUX. HEAT  
RELAY  
Fig. 4. Typical hookup in heat pump system with  
emergency heat relay for single compressor  
systems.  
COMPRESSOR  
CONTACTOR 1  
EQUIPMENT  
MONITOR  
FAN  
RELAY  
OR DEFROST  
RESET  
4
FOR WRAPAROUND  
INSERTION STRIP  
7/16 IN. (11 MM).  
FOR STRAIGHT INSERTION  
STRIP 5/16 IN. (8 MM).  
CONTROL  
COOL/HEAT  
CHANGEOVER  
VALVE  
5
3
M4826  
COMPRESSOR  
CONTACTOR 2  
1
L1  
HOT)  
(
Fig. 5. Correct wiring technique.  
L2  
1
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND  
OVERLOAD PROTECTION AS REQUIRED.  
USE OUTDOOR SENSOR C7089B1000 AND CONFIGURE  
INSTALLER SETUP NUMBER 24 TO 1.  
3
BE SURE INSTALLER SETUP NUMBER 3 IS SET TO 2 FOR TWO  
COMPRESSOR SYSTEMS.  
4
WIRE EQUIPMENT MONITOR OR DEFROST RESET CONTROL  
PER MANUFACTURER INSTRUCTIONS.  
5
CONFIGURE IN INSTALLER SETUP.  
M13289  
Fig. 3. Typical hookup in heat pump application with  
emergency heat relay and O/B terminal.  
3
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T8611M DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS  
NOTE: Always press the keys with your fingertip or  
Mounting Thermostat  
similar blunt tool. Sharp instruments like a pen  
or pencil point can damage the keyboard.  
1.  
Engage tabs at the top of the thermostat and  
wallplate. See Fig. 6.  
2.  
Press lower edge of case to close and latch.  
NOTE: To remove the thermostat from the wall, first pull  
out at the bottom of the thermostat; remove top  
last.  
Using Thermostat Keys  
A. ENGAGE TABS  
AT TOP OF  
THERMOSTAT  
AND WALLPLATE.  
The thermostat keys are used to:  
•
•
•
•
•
•
•
•
•
set current day and time,  
program times and setpoints for heating and cooling,  
temporarily override program temperatures,  
display present setting,  
configure Installer Setup,  
check System Test,  
display outdoor temperature (select models),  
set the system operation,  
set the fan operation.  
See Fig. 7 for the key location.  
B. PRESS LOWER  
EDGE OF CASE  
TO LATCH.  
M14634  
Fig. 6. Mounting thermostat on wallplate.  
INCREASE TEMPERATURE  
SETTING OR SCROLL  
FORWARD THROUGH  
INCREASE TIME SETTING  
OR SCROLL FORWARD  
THROUGH INSTALLER SETUP  
AND SYSTEM TEST  
SET WAKE TIMES  
AND SETPOINTS  
SET LEAVE TIMES  
AND SETPOINTS  
SET RETURN TIMES  
AND SETPOINTS  
INSTALLER SETUP OPTIONS  
DECREASE TEMPERATURE  
SETTING OR SCROLL  
BACKWARD THROUGH  
INSTALLER SETUP OPTIONS  
SET CURRENT  
DAY AND TIME  
RETURN TO  
NORMAL  
OPERATIONS  
DISPLAY INFORMATION  
SUCH AS PRESENT  
SETTINGS AND OUTDOOR  
TEMPERATURE  
ENTER  
INDEFINITE  
OR TIMED  
HOLD MODE  
Time  
Set Program  
Leave  
SET SLEEP TIMES  
AND SETPOINTS  
Run  
Program  
Set Current  
Day/Time  
Wake  
Return  
Sleep  
Fan  
Heat/Cool  
Settings  
SELECT FAN  
OPERATION  
Hold Temp  
Day  
System  
SET CURRENT OR  
PROGRAM DAY  
Daylight  
Time  
Copy  
SELECT SYSTEM  
OPERATION  
CHANGE BETWEEN  
DAYLIGHT SAVINGS  
AND STANDARD TIME  
DECREASE TIME SETTING OR  
SCROLL BACKWARD THROUGH  
INSTALLER SETUP AND SYSTEM TEST  
CHANGE BETWEEN  
HEATING AND COOLING  
SETPOINTS  
COPY ONE PROGRAMMED  
DAY TO ANOTHER DAY  
M14624  
Fig. 7. T8611M key locations and descriptions.  
System settings control the thermostat operation:  
Em Heat: Defrost reset output relay (L) is on  
continuously. The thermostat cycles the  
SETTINGS  
System and Fan Settings  
Emergency Heat relay and the highest heat stage.  
Cooling system is off. Compressor is de-energized.  
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.  
The system default setting is Heat and the fan default  
setting is Auto. Use the System and Fan keys to change  
the settings. See Fig. 8. The fan settings can be set for  
each program period individually. The system selection is  
for all the program periods.  
Fan settings control the system fan:  
On: Fan operates continuously.  
Auto: Fan operates with equipment.  
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T8611M DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS  
INSTALLER SETUP  
NOTE: For most applications, the thermostat factory-  
settings will not need to be changed. Review  
the factory settings in Table 2 and if no changes  
are necessary, go to the Installer System Test  
Time  
Copy  
Set Program  
Leave  
Return  
Run  
Set Current  
Day/Time  
Wake  
Sleep  
Fan  
Program  
section.  
Heat/Cool  
Settings  
System  
System  
Hold Temp  
Day  
Daylight  
Time  
The Installer Setup is used to customize the thermostat  
to specific systems. Some of the options include  
Fan  
temperature display, changeover and outdoor  
temperature display. Installer Setup numbers are listed in  
Table 3. The table includes all the configuration options  
and the factory settings for the T8611.  
M14625  
A combination of key presses are required to use the  
Installer Setup feature:  
Fig. 8. T8611M System and Fan key locations.  
—
To enter the installer setup, press and hold the  
information i key with the increase s and decrease t  
keys until the first number is displayed. All display  
segments appear for approximately three seconds  
before the number is displayed. See Fig. 10 and 11.  
To advance to the next Installer Setup, press the  
Time ∆ key.  
LED Indication  
Two LED indicators are located in the upper right of the  
thermostat. They indicate when a CHECK or FAIL signal  
is sent to the thermostat from the system. See Fig. 9. The  
CHECK LED is on continuously when the thermostat  
system setting is in the Emergency Heat position.  
—
—
—
To change a setting, use the increase s or  
decrease t key.  
To scroll the Installer Setup numbers backward, press  
the Time ∇ key.  
.
TWO LED INDICATORS  
— To exit the Installer Setup, press Run Program.  
System  
Wait Set Program Set Day/Time Temporary Setting  
Em Heat  
Off  
Recovery  
Hold for  
AM  
Cool  
Auto  
PM  
Filter Em Ht Aux Ht Days  
M10675A  
Fan  
MonTue Wed Thu Fri Sat Sun Repl Batt Room Outdoor  
On  
Wake Leave Return Sleep DST  
Heat Cool  
Auto  
Fig. 9. LED location.  
M14559  
Temperature Settings  
Refer to Table 2 for the default program settings. If the  
daytime energy savings period is not used, press the  
period key (Leave or Return) until the time is blank. The  
fan setting feature is available on select thermostat  
models. See Owner’s Guide for complete instructions on  
changing the program.  
Fig. 10. Display of LCD segments.  
Table 2. Default Program Settings.  
Heat  
Cool  
Fan  
Period  
Time  
Setpoint Setpoint Setting  
Wake  
6:00 AM  
70°F  
21°C)  
78°F  
(25.5°C)  
Auto  
Auto  
Auto  
Auto  
INSTALLER SETUP  
NUMBER DISPLAY  
FACTORY SETTING OR OTHER  
CHOICE DISPLAY (COLUMN 3  
(
(
COLUMN 2 OF TABLE 3)  
OR 5 OF TABLE 3)  
M14618  
Leave  
8:00AM  
62°F  
16.5°C)  
85°F  
(29.5°C)  
(
(
Fig. 11. Display of Installer Setup  
number and setting.  
Return 5:00 PM  
Sleep 10:00 PM  
70°F  
21°C)  
78°F  
(25.5°C)  
(
62°F  
16.5°C)  
82°F  
(28°C)  
IMPORTANT  
Only configurable numbers are shown on the  
device. Example: If thermostat does not have a  
system key, Installer Setup Number 12 will not  
be displayed. Review Table 3 factory settings  
and mark any desired changes in the Actual  
Setting column. When Installer Setup is  
complete, review the settings to confirm that  
they match the system.  
5
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T8611M DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS  
Table 3. Thermostat Installer Setup Options.  
Installer Setup  
Number (Press  
Time ∆ key to  
change)  
Other Choices  
(Press s or t key to change)  
Factory Setting  
Display Description  
Actual  
Setting  
Select  
Display  
Description  
Not Used.  
1 thru 4  
3
—
2
—
—
1
—
—
Number of  
compressor  
stages.  
Two compressor  
stages or two  
speed compressor.  
Single stage compressor  
systems.  
Heating cycle.  
Not Used.  
6
—
6
—
—
3—3 cph  
Auxiliary heat.  
3, 6 or 9 6—6 cph used for last stage —  
of heat pump systems.  
7
9
Emergency heat. 3, 6 or 9 9—9 cph used for electric  
heat.  
Not Used.  
8 thru 11  
12  
—
1
—
—
—
—
—
System setting  
adjustment  
Manual  
0 or 2 0—Auto changeover.  
2—Fixed auto changeover.  
changeover  
Adaptive  
Intelligent  
Recovery™  
control.  
13  
14  
0
0
AdaptiveIntelligent  
Recovery™  
control is activated  
(system starts  
early so setpoint is  
reached by start of  
program period).  
1
Conventional recovery  
(system starts recovery at  
programmed time).  
Degree  
temperature  
display.  
Temperature is  
displayed in °F  
1
Temperature is displayed  
in °C.  
Not Used.  
15  
16  
—
0
—
—
1
—
—
—
Clock format.  
12-hour clock  
format.  
24-hour clock format.  
Not Used.  
17 thru 18  
19  
—
0
—
—
1
—
Extended fan  
operation in  
heating.  
No extended fan  
operation after the  
call for heat ends.  
Fan operation is extended  
90 seconds after the call for  
heat ends.  
Extended fan  
operation in  
cooling.  
20  
No extended fan  
operation after the  
call for cool ends.  
1
Fan operation is extended  
90 seconds after the call for  
cool ends.  
Not Used.  
21 thru 23  
24  
—
0
—
—
1
—
—
—
Outdoor  
No outdoor  
temperature is  
displayed.  
Outdoor temperature is  
displayed. Needs a  
C7089B1000 Outdoor  
Temperature Sensor to  
operate.  
temperature  
display(models  
with OT  
terminals).  
Not Used.  
25 thru 28  
29  
—
0
—
—
1
—
O/B terminal  
energized in  
heating or  
cooling.  
O/B terminal  
energized for  
reversing valve in  
cooling.  
O/B terminal energized for  
reversing valve in heating.  
Deadband  
30  
3
Heating and  
4 thru 10 Heating and cooling  
setpoints can be set no  
closer than the chosen  
value:  
cooling setpoints  
can be set no  
closer than 3°F  
(
1.5°C).  
4—4°F (2°C)  
5
6
7
8
9
1
—5°F (2.5°C)  
—6°F (3°C)  
—7°F (3.5°C)  
—8°F (4°C)  
—9°F (4.5°C)  
0—10°F (5°C)  
Not Used.  
31 and 32  
—
—
—
—
—
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T8611M DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS  
Table 3. Thermostat Installer Setup Options. (Continued)  
Installer Setup  
Number (Press  
Time ∆ key to  
change)  
Other Choices  
(Press s or t key to change)  
Factory Setting  
Display Description  
Actual  
Setting  
Select  
Display  
0 thru 4  
Description  
Minimum off  
time for the  
compressor.  
33  
5
5 minutes  
minimum off time  
for the  
Minimum number of minutes  
(0 thru 5) the compressor is  
off between calls for the  
compressor.  
compressor.  
Temperature  
range stops in  
heating.  
34  
35  
90  
45  
Highest heating  
setpoint setting.  
40 to 89 Temperature range (1°F  
increments) of heating  
setpoint settings.  
Temperature  
range stops in  
cooling.  
Lowest cooling  
setpoint setting.  
46 to 99 Temperature range (1°F  
increments) of cooling  
setpoint settings.  
Not Used.  
36  
37  
—
0
—
—
—
—
Temperature  
display  
adjustment.  
No difference in  
displayed  
temperature and  
actual room  
-3 thru 3 1—Display adjusts to 1°F  
higher than actual room  
temperature.  
2—Display adjusts to 2°F  
higher than actual room  
temperature.  
temperature.  
3
—Display adjusts to 3°F  
higher than actual room  
temperature.  
-
-
-
1—Display adjusts to -1°F  
lower than actual room  
temperature.  
2—Display adjusts to -2°F  
lower than actual room  
temperature.  
3—Display adjusts to -3°F  
lower than actual room  
temperature.  
Furnace Air  
Filter Timer.  
43  
2
30 days (System 0, 1, 3, 4 0 – off  
run time) 1 – 10 days  
3
4
– 60 days  
– 120 days  
(
Time is counted when heat,  
cool or fan running.)  
Humidifier Pad  
Monitor.  
44  
45  
0
0
Off  
1, 2, 3  
1 – 90 days  
2 – 180 days  
3
– 365 days  
(Time is counted by calendar  
days in heat mode.)  
Ultraviolet (UV)  
Air Treatment  
System Lamp  
Monitor.  
Off  
1
1 – 365 days  
(Time is counted by calendar  
days in any mode.)  
IMPORTANT  
Review the settings to confirm that they match  
the system. Press Run Program to exit the  
Installer Setup. The thermostat has saved the  
Installer Setup changes and initiated a reset in  
order to operate using the new settings. Be sure  
to set the current day and time immediately.  
7
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T8611M DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS  
Setting Current Day and Time  
View or Reset Timer Settings  
When the thermostat activates a timer, the thermostat  
1.  
Press Set Current Day/Time.  
flashes Filter until the timer resets.  
NOTE: On initial powerup or after an extended power  
loss, 1:00 pm flashes on the display until a key  
is pressed.  
1. Reset the timer by pressing the i key until the  
expired timer is displayed.  
Set Day/Time  
Time  
Copy  
Set Program  
Leave  
Return  
PM  
Filter  
Days  
PrRo  
g
u
r
n
am  
S
De at yC / Tu ir  
m
re  
e
nt  
Wake  
Sleep  
Fan  
Set Current  
Day/Time  
Hold  
T
emp  
Day  
H
S
e
e
at tt /i Cn g  
o
s
ol  
System  
Mon  
D Ta yi  
m
lig  
e
ht  
M14619  
M20243  
2.  
Press Day until the current day is displayed.  
2.  
Press the Time ∆ key to reset the timer.  
NOTE: Sun=Sunday, Mon=Monday,  
Tue=Tuesday, Wed=Wednesday,  
Thu=Thursday, Fri=Friday, Sat=Saturday.  
Filter  
Days  
Set Day/Time  
Time  
Set Program  
Leave  
Return  
PM  
M20244  
PrRo  
g
u
r
n
am  
S
De at yC / Tu ir  
m
re  
e
nt  
Wake  
Sleep  
Fan  
Day  
Heat/Cool  
Tue  
Hold  
T
emp  
Day  
Settings  
System  
3. Press the Run Program key.  
D Ta yi  
m
lig  
e
ht  
Copy  
M14620  
NOTE: You can view the number of days remaining at  
any time by pressing the i key three or four  
times. If more than one timer is active, all active  
timers show sequentially when pressing the  
i key several times.  
3
.
Press Time ∆ or Time ∇ until the current time is  
displayed.  
NOTE: Tapping the Set Current Day/Time changes the  
time in one hour increments.  
INSTALLER SYSTEM TEST  
Time  
Set Day/Time  
AM  
Use the Installer System Test to check the thermostat  
operation. Refer to Table 4 for a list of the available  
system tests.  
Time  
Copy  
Set Program  
Leave  
Return  
PrRo  
g
u
r
n
am  
S
De at yC / Tu ir  
m
re  
e
nt  
Wake  
Sleep  
Fan  
Hold  
T
emp  
Day  
H
S
e
e
at tt /i Cn g  
o
s
ol  
System  
Tue  
D Ta yi  
m
lig  
e
ht  
M14621  
CAUTION  
NOTE: If the current time is Daylight Savings Time,  
press Daylight Time until DST is displayed.  
Equipment Damage Hazard.  
Minimum compressor off-time is bypassed  
during Installer System Test.  
Avoid cycling compressor quickly.  
Set Day/Time  
AM  
To start the system test:  
Time  
Set Program  
Leave  
Return  
Press and hold the increase s and decrease t keys at the  
same time until 10 appears. All segments of the display  
are displayed before the 10 appears.  
See Fig. 12 and 13.  
Daylight  
Time  
PrRo  
g
u
r
n
am  
S
De at yC / Tu ir  
m
re  
e
nt  
Wake  
Sleep  
Fan  
Hold  
T
emp  
Day  
H
S
e
e
at tt /i Cn g  
o
s
ol  
System  
Tue  
D Ta yi  
m
lig  
e
ht  
Copy  
DST  
M14622  
4.  
Press Run Program.  
System  
Heat  
Table 4. Tests Available In Installer System Test.  
Test  
AM  
Time  
Set Program  
Leave  
Return  
Run  
PrRo  
g
u
r
n
am  
S
De at yC / Tu ir  
m
re  
e
nt  
Wake  
Sleep  
Fan  
Fan  
Program  
Hold  
T
emp  
Day  
H
S
e
e
at tt /i Cn g  
o
s
ol  
System  
Tue  
Wake  
Room  
D Ta yi  
m
lig  
e
ht  
Copy  
DST  
Auto  
Number  
System Test Description  
M14623  
1
3
4
0-19  
0-39  
0-49  
Heating equipment can be turned on and off.  
Cooling equipment can be turned on and off.  
Fan equipment can be turned on and off.  
6
6
0 0 to Keyboard keys test.  
0 19  
7
0-79  
Thermostat information including date code  
and software versions are displayed.  
69-1415—1  
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T8611M DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS  
System  
Em Heat  
Off  
Cool  
Auto  
Wait Set Program Set Day/Time Temporary Setting  
Recovery  
Hold for  
AM  
PM  
Filter Em Ht Aux Ht Days  
Fan  
MonTue Wed Thu Fri Sat Sun Repl Batt Room Outdoor  
On  
Wake Leave Return Sleep DST  
Heat Cool  
Auto  
M14612  
M14559  
Fig. 13. Display of test number.  
Fig. 12. Display of all LCD segments.  
Refer to Table 5 for the directions and results of the  
specific tests.  
NOTE: Press Time ∆ to advance to the next test and  
Time ∇ to go back to the previous test. Press  
Run Program to exit the System Test,  
Table 5. Installer System Test Options.  
Description  
Keys to  
Press  
Test  
Number  
Heating Equipment System Test  
Time ∆  
10  
11  
12  
13  
12  
11  
10  
Enter heating equipment system test.  
s
s
s
t
t
t
Stage one heat comes on. The system fan is also energized.  
Stage two heat comes on. Stage one heat and system fan remain on.  
Stage three heat comes on. Stage one and two remain on.  
Stage three heat turns off.  
Stage two heat turns off.  
Stage one heat and system fan turn off.  
Emergency Equipment Heating Equipment System Test  
Time ∆  
20  
21  
22  
21  
20  
Change from heating to emergency heating equipment system test.  
Emergency heat comes on.  
s
s
s
t
Stage two emergency heat comes on.  
Stage two emergency heat turns off.  
Emergency heat turns off.  
Cooling Equipment System Test  
Time ∆  
30  
31  
32  
31  
30  
Change from heating or emergency heating to cooling equipment system test.  
Cool and system fan come on.  
s
s
t
t
Stage two cooling comes on.  
Stage two cooling turns off.  
Cool and system fan turn off.  
Fan Equipment System Test  
Time ∆  
40  
41  
40  
Change from cooling to fan equipment system test.  
s
t
Fan comes on.  
Fan turns off.  
Key Operation System Test  
Time ∆ 60 Change from fan to key operation system test.  
NOTE: Press any key and the displayed numbers change. Press Time ∇ to go to the previous test and Time ∆ to go to  
the next test. The Run Program key does not exit this test. Press Time ∆ or Time ∇ and then the  
Run Program key to exit.  
9
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T8611M DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS  
THERMOSTAT INFORMATION  
1.  
Press the Time ∆ key to access the thermostat  
information.  
4. Press the increase s key again to display the  
software revision number.  
(Example: 001 = Revision number 1).  
M14613  
M14616  
2.  
Press the increase s key to display the production  
date code. The first two large digits are the month  
and the third digit is the last digit of the year.  
5.  
Press the increase s key again to display the  
EEPROM identification code. (Example: 314 =  
EEPROM ID 314)  
(Example: 027 = February 1997).  
M14617  
M14614  
6.  
Press the Run Program key to exit the System  
Test. The System Test times out after four minutes  
without any key presses.  
3.  
Press the increase s key again to display the  
software identification code.  
(Example: 02 = software ID code 2)  
CHECKOUT  
Outdoor Temperature Sensor  
(
Select Models)  
Allow the outdoor temperature sensor to absorb the  
outdoor air for a minimum of five minutes before taking a  
reading.  
M14615  
69-1415—1  
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T8611M DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS  
TROUBLESHOOTING GUIDE  
Table 6. Troubleshooting Guide.  
Symptom  
Possible Cause  
Action  
Display doesnot  
come on.  
Thermostat is not being  
powered.  
• Check for 24 Vac between R and C terminals.  
— If missing 24 Vac:  
—
check if the circuit breaker is tripped—reset the circuit  
breaker.  
—
—
check if the system fuse is blown—replace the fuse.  
check if the power switch on the HVAC equipment is in  
the Off position—set to the On position.  
check wiring between thermostat and HVAC  
equipment—replace any broken wires and tighten any  
loose connections.  
—
—
If 24 Vac is present, proceed with troubleshooting  
Temperature  
Room temperature display has Enter Installer Setup number 37 and reconfigure the display.  
display is incorrect. been reconfigured.  
Thermostat is configured for °F Enter Installer Setup number 14 and reconfigure the display.  
or °C display.  
Bad thermostat location.  
Relocate the thermostat.  
Temperature  
The upper or lower temperature Check the temperature setpoints:  
limits were reached. • Heating limits are 40 to 90°F (4.5 to 32°C)  
• Cooling limits are 48 to 99°F (7 to 37°C)  
settings do not  
change. (Example:  
Cannot set the  
heating higher or  
the cooling lower.)  
The setpoint temperature range Check Installer Setup numbers 34 and 35 and reconfigure the  
stops were configured.  
setpoint stops.  
Heating does not  
come on.  
No power to the thermostat.  
• Check for 24 Vac between R and W terminals.  
— If missing 24 Vac:  
—
check if the circuit breaker is tripped—reset the circuit  
breaker.  
—
—
check if the system fuse is blown—replace the fuse.  
check if the power switch on the HVAC equipment is in  
the Off position—set to the On position.  
check wiring between thermostat and HVAC  
equipment—replace any broken wires and tighten any  
loose connections.  
—
—
If 24 Vac is present, proceed with troubleshooting.  
Thermostat minimum off time is Wait up to five minutes for the system to respond.  
activated.  
System selection is not set to  
Heat.  
Set system selection to Heat.  
Heating setpoint is below room Check heating setpoint. Set heating setpoint to desired  
temperature.  
temperature.  
Cooling does not  
come on.  
No power to the thermostat.  
• Check for 24 Vac between R and C terminals.  
— If missing 24 Vac:  
—
check if the circuit breaker is tripped—reset the circuit  
breaker.  
—
—
check if the system fuse is blown—replace the fuse.  
check if the power switch on the HVAC equipment is in  
the Off position—set to the On position.  
check wiring between thermostat and HVAC  
equipment—replace any broken wires and tighten any  
loose connections.  
—
—
If 24 Vac is present, proceed with troubleshooting.  
Thermostat minimum off time is • Wait up to five minutes for the system to respond.  
activated.  
• Enter Installer Setup number 33. Reconfigure minimum off  
time (if required).  
System selection is not set to  
Cool.  
Set system selection to Cool.  
Cool setpoint is above room  
temperature.  
Check cooling setpoint. Set cooling setpoint to desired  
temperature.  
11  
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T8611M DELUXE PROGRAMMABLE HEAT PUMP THERMOSTATS  
Table 6. Troubleshooting Guide. (Continued)  
Possible Cause Action  
System on indicator Heating or cooling equipment is Verify operation of heating or cooling equipment in self-test.  
Symptom  
(
flame=heat, not operating.  
snowflake=cool) is  
displayed, but no  
warm or cool air is  
coming from the  
registers.  
Outdoor tempera- Option not activated.  
ture not displayed .  
Enter Installer Setup number 24 and set to 1. Thermostat must  
have OT terminals and a C7089B1000 installed.  
a
Outdoor  
temperature  
display is  
Outdoor sensor is connected  
incorrectly.  
Refer to C7089B1000 Installation Instructions and check wiring  
between the thermostat and sensor.  
Wrong sensor.  
Replace sensor with C7089B1000 Sensor.  
a
incorrect .  
aSelect models.  
Automation and Control Solutions  
Honeywell Honeywell Limited-Honeywell Limitée  
985 Douglas Drive North  
Golden Valley, MN 55422  
1
35 Dynamic Drive  
Scarborough, Ontario  
M1V 4Z9  
Printed in U.S.A. on recycled  
paper containing at least 10%  
post-consumer paper fibers.  
69-1415—1 G.H. Rev. 12-02  
www.honeywell.com/yourhome