Honeywell T8132A Thermostat User Manual

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T8131A,B,C; T8132A,B,C  
Programmable Thermostats  
The T8131 and T8132 Thermostats provide  
energy savings for single-stage heating and cool-  
ing applications while providing reliable, precise  
temperature control.  
T8131C  
T8132C  
T8131/T8132 Models  
T8131 Models Only  
HEAT-OFF-COOL system switch.  
AUTO-ON fan switch.  
Powered directly from 24 Vac system transformer.  
Green light emitting diode (LED) lights when prop-  
erly connected.  
Separate programs for weekdays and weekends  
5
day/2 day.  
 Two AA alkaline batteries for backup power  
recommended.  
Digital LCD display.  
Easy to program and install.  
Precise temperature control.  
Four daily energy saving programs.  
Available in taupe and Premier White.  
T8132 Models Only  
Requires two AA alkaline batteries.  
LCDflashes“bAtLo”indicatinglowbatterypower.  
Isolated heating/cooling circuits.  
Compatible with most 24 Vac standing pilot, gas  
electronic ignition, oil or central electric systems.  
CONTENTS  
Specifications ................................................ 2  
Ordering Information .................................... 2  
Installation .................................................... 3  
Programming the Thermostat ....................... 8  
Checkout and Settings ................................. 10  
Troubleshooting .......................................... 11  
Cross Reference .......................................... 12  
B.M. • Rev. 6 - 94 • ©Honeywell Inc. 1994 • Form Number 68-0148 1
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T8131A,B,C;T8132A,B,C  
SPECIFICATIONS • ORDERING INFORMATION  
Specifications  
IMPORTANT: The specifications given in this publica-  
tion do not include normal manufacturing toler-  
ances; therefore, an individual unit may not exactly  
match the listed specifications. Also, this product is  
tested and calibrated under closely controlled condi-  
tions, and some minor differences in performance  
can be expected if those conditions are changed.  
T8131B/T8132B Programmable Thermostats: Provide  
eight program keys; without keyboard door.  
T8131C/T8132C Programmable Thermostats: Deluxe  
models, provide twelve program keys including us-  
age key; with keyboard door.  
ELECTRICAL RATING: T8131: 24 Vac.  
T8132: Battery operated (2 AA alkaline batteries).  
SYSTEM AND FAN RATINGS:  
MODELS:  
1.2A run; 7.5A inrush.  
Total cooling and fan load not to exceed 1.2A.  
T8131A/T8132A Programmable Thermostats: Provide  
eight program keys; with keyboard door.  
DIMENSIONS: See Fig. 1.  
Fig. 1—Dimensions in in. [mm] of T8131 and T8132 models.  
7
8
3
4
6
[175]  
1 [25]  
[19]  
1
4
32]  
1
[
4
[
102]  
M9349  
MOUNTING MEANS: Position mounting plate directly  
on wall using two mounting screws and wall anchors  
provided (See Fig. 2).  
LIGHT EMITTING DIODE (LED): One LED on T8131  
models only; lights to indicate proper operation when  
both sides of the 24 Vac system transformer are prop-  
erly connected. See Fig. 2 for position of LED.  
SET POINT RANGE: 45° F to 88° F [7° C to 31° C].  
OPERATING AMBIENT TEMPERATURE RANGE:  
40° F to 110° F [4° C to 43° C].  
SHIPPING TEMPERATURE RANGE: -20° F to 120° F  
[-29° C to -49° C].  
OPERATING RELATIVE HUMIDITY: 5 percent RH to  
90 percent RH; noncondensing.  
TIME INDICATION: 12 hour with AM, PM indication.  
Ordering Information  
®
When purchasing replacement and modernization products form your TRADELINE wholesaler or your distributor, refer to the  
TRADELINE Catalog or price sheets for complete ordering information, or specify—  
1
. Order Number.  
2. Accessories, if desired.  
If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:  
1. Your local Honeywell Home and Building Control Sales Office (check white pages of phone directory).  
2
. Home and Building Control Customer Satisfaction  
Honeywell Inc., 1985 Douglas Drive North  
Minneapolis, Minnesota 554212-4386 (612) 951-1000.  
In Canada—Honeywell Controls Limited/Honeywell Limitée, 740 Ellesmere Road, Scarborough, Ontario M1P 2V9 . International  
Sales and Service offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan,  
Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.  
6
8-0148—1  
2
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T8131A,B,C;T8132A,B,C  
SPECIFICATIONS • INSTALLATION  
CYCLES PER HOUR ADJUSTMENT:  
Heating: Field adjustable to 3, 6, or 9 cph ±10 percent.  
Cooling: Factory-set at 3 cph ±10 percent (not field  
adjustable).  
Fig. 2—T8131 LED.  
LED LIGHTS WHEN  
PROPERLY CONNECTED  
CALIBRATION: Thermostat and thermometer self-cali-  
brating to ±1.25° F.  
POWER  
FINISH:AllmodelsavailableintaupeandPremierWhite™.  
ACCESSORIES:  
2
2
2
05013 Isolation Relay kit.  
05014 Transformer Plug-in Kit.  
05015 International Organization for Standardization  
Relay and Transformer.  
M9365  
Installation  
WHEN INSTALLING THIS PRODUCT…  
. Read these instructions carefully. Failure to follow  
instructions can damage product or cause a hazardous  
condition.  
1
WARNING  
ELECTROCUTION HAZARD CAN  
CAUSE PROPERTY DAMAGE, SEVERE  
INJURY, OR DEATH.  
2. Check the ratings given in the instructions and on the  
product and the compatibility chart below to make sure the  
product is suitable for your application.  
Disconnect power supply before wiring to pre-  
vent electrical shock or equipment damage.  
3. Make sure installer is a trained, experienced service  
technician.  
4
. After completing installation, use these instructions  
LOCATION  
to check out product operation.  
Locate the thermostat about 5 ft [1.5m] above the floor  
in an area with good air circulation at average temperature.  
Do not mount the thermostat where it may be affected by:  
COMPATIBILITY  
Check Table 1 to make sure the thermostat is compatible  
with the intended system.  
drafts or dead spots behind doors and in corners.  
hot or cold air ducts.  
concealed pipes and chimneys.  
unheated (uncooled) areas such as an outside wall  
behind the thermostat.  
TABLE 1—COMPATIBILITY CHART.  
Compatible  
with  
T8131/T8132  
MOUNT THERMOSTAT MOUNTING PLATE  
FIG. 2)  
Position mounting plate on wall. Use spirit level to make  
System Type  
Gas—Standing Pilot  
(
Yes  
sure mounting plate is level. Use a pencil to mark the two  
mounting holes.  
Gas—Electronic Ignition  
Gas-Fired Boilers  
Gas—Millivolt  
Yes  
Yesa  
Level for appearance only; thermostat will function  
properly even when not level. Tighten mounting screws.  
Remove mounting plate from wall, and drill 3/16 inch  
holes in wall (if drywall) as marked. For firmer material  
such as plaster or wood, drill 7/32 inch holes. Gently tap  
anchors (provided) into drilled holes until flush with the  
wall.  
No  
Oil-Fired Boilers  
Yesa  
Yes  
Oil-Fired Furnace  
Electric Furnace  
Yes  
Electric Air Conditioning  
Yes  
Reposition mounting plate over holes, pulling wires  
through wiring opening. Loosely insert two mounting  
screws into holes.  
Baseboard Electric  
No  
(120/240 Line Volt)  
Heat pumps/Multistage Equipment  
No  
Not compatible with any 120/240 volt circuit.  
Not designed for steam or gravity systems.  
a
Compatible with 2-wire Honeywell zone valves. Isolating  
relay required for 3-wire thermostats for zone valves. Not  
compatible with 2-wire White Rodgers no. 1361 Valves.  
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68-0148—1  
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T8131A,B,C;T8132A,B,C  
IN STALLAT IO N  
Fig. 3—Mounting thermostat mounting plate.  
Fig. 5—3-wire heat-only application.  
WALL  
ANCHORS (2)  
3-WIRE HEAT-ONLY  
A
WIRES THROUGH  
WALL OPENING  
B
W
Y
G
WALL  
C
R
1
HEATING  
MOUNTING  
PLATE  
L1  
(HOT)  
L2  
RELAY OR  
VALVE COIL  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS  
AND OVERLOAD PROTECTION AS REQUIRED.  
M9213  
MOUNTING  
SCREWS (2)  
M1718  
Fig. 6—4-wire cool-only application.  
WIRING  
All wiring must comply with all applicable electrical  
codes, ordinances, and regulations. Follow instructions  
provided with the controlled equipment.  
Loosen the terminal screws and slip each wire beneath  
its matching terminal. See Fig. 4 for wiring insertion tech-  
niques. Tighten terminals securely.  
4-WIRE COOL-ONLY  
A
B
W
Y
G
Plug the hole in the wall with insulation to help prevent  
drafts from adversely affecting thermostat operation.  
C
R
T8131 Models  
Run the required number of wires to the thermostat  
location (check the appropriate wiring diagram). Refer to  
Figs. 5 through 7 for typical wiring diagrams.  
COOLING  
CONTACTOR  
COIL  
1
FAN  
RELAY  
L1  
(HOT)  
T8132 Models  
Run the required number of wires to the thermostat  
location (check the appropriate wiring diagram). Refer to  
Figs. 8 through 11 for typical wiring diagrams.  
In 5-wire installations only, be sure to remove the fac-  
tory-installed jumper connecting terminals R and Rc.  
L2  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND  
OVERLOAD PROTECTION AS REQUIRED.  
M9212  
Fig. 7—5-wire heat/cool application.  
5
-WIRE HEAT/COOL  
Fig. 4—Proper wiring technique.  
A
PROPER WIRING TECHNIQUE  
B
INSERT  
STRAIGHT  
W
Y
G
5
[
/16 in.  
8 mm]  
STRIP  
UNDER  
SCREW HEAD  
R
C
END OF WIRE  
VISIBLE HERE  
M3825  
HEATING  
RELAY OR  
VALVE COIL  
FAN  
RELAY  
COOLING  
CONTACTOR  
COIL  
1
L1  
HOT)  
(
L2  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND  
OVERLOAD PROTECTION AS REQUIRED.  
M9214  
6
8-0148—1  
4
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T8131A,B,C;T8132A,B,C  
IN STALLAT IO N  
Fig. 8—2-wire heat-only application (jumper  
intact).  
Fig. 10—4-wire heat/cool application (jumper  
intact).  
2-WIRE HEAT-ONLY (JUMPER INTACT)  
4-WIRE HEAT/COOL (JUMPER INTACT)  
A
C
A
C
B
D
B
D
JUMPER  
W
R
Y
G
W
R
Y
G
JUMPER  
Rc  
Rc  
HEATING  
RELAY OR  
VALVE COIL  
HEATING  
RELAY OR  
VALVE COIL  
COOLING  
CONTACTOR  
COIL  
L1  
(
HOT)  
1
L2  
FAN  
RELAY  
L1  
(
HOT)  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND  
OVERLOAD PROTECTION AS REQUIRED.  
M1709B  
L2  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND  
OVERLOAD PROTECTION AS REQUIRED.  
M1710B  
Fig. 9—3-wire cool-only application (jumper  
intact).  
Fig. 11—5-wire heat/cool application (jumper  
removed).  
3
-WIRE COOL-ONLY (JUMPER INTACT)  
A
C
5-WIRE HEAT/COOL (JUMPER REMOVED)  
B
D
A
C
W
R
Y
G
B
D
JUMPER  
W
R
Y
G
Rc  
Rc  
COOLING  
CONTACTOR  
COIL  
HEATING  
RELAY OR  
VALVE COIL  
FAN  
RELAY  
FAN  
RELAY  
L1  
(
HOT)  
L2  
COOLING  
CONTACTOR  
COIL  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND  
OVERLOAD PROTECTION AS REQUIRED.  
1
1
M848A  
L1  
L1  
(HOT)  
L2  
(
HOT)  
L2  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND  
OVERLOAD PROTECTION AS REQUIRED.  
M1711B  
5
68-0148—1  
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T8131A,B,C;T8132A,B,C  
IN STALLAT IO N  
ADJUST FAN OPERATION SWITCH, AS  
REQUIRED  
The thermostat fan operation switch, labeled FUEL  
SWITCH (see Fig. 12) is factory-set in the “F” position.  
This is the correct setting for most systems. If this system is  
an electric heat system, set the switch to “E.” The “E”  
setting will allow the fan to turn on immediately with the  
heating or cooling in a system where the “G” terminal is  
connected.  
Fig. 12—T8131 and T8132 back.  
T8131 THERMOSTAT BACK  
T8132 THERMOSTAT BACK  
A
A
B
C
D
ADJUST SCREWS THROUGH HOLES  
TO SELECT OPERATION DESIRED  
DISPLAY °F C–IN  
ADJUST SCREWS THROUGH HOLES  
TO SELECT OPERATION DESIRED  
DISPLAY °C C–OUT  
FUEL SWITCH  
FUEL SWITCH  
HEATING SYSTEM  
WARM AIR A–IN B–IN  
FURNACE  
HOT WATER A–OUT B–IN  
POSITION  
F
1
TURN  
HEATING SYSTEM  
WARM AIR A–IN B–IN  
FURNACE  
HOT WATER A–OUT B–IN  
POSITION  
F
B
F
E
F
E
BOILER  
1
TURN  
BOILER  
1 TURN  
ELECTRIC  
FURNACE  
A–IN  
B–OUT  
ELECTRIC  
FURNACE  
A–IN  
B–OUT  
1
TURN  
1
TURN  
W
Y
G
W
Y
G
FUEL SWITCH  
FUEL SWITCH  
F
E
F
E
C
R
R
Rc  
M9348  
ADJUST SYSTEM ON-LENGTH, AS REQUIRED  
The thermostat on-length is factory-set for a warm air,  
gas or oil heating system. When installing it on another type  
ofsystem, adjusttheon-lengthaccordinglybysettingscrews  
A and B on the back of the thermostat, using the heating  
system table in Fig. 12 as a guide. To minimize room  
temperature swings, optimize the on-length according to  
the type of system. Adjusting the screw “out one turn”  
means turning the screw approximately 360°, or about one  
complete turn.  
Use two AA alkaline batteries; nonalkaline batteries  
will not last as long. We recommend Energizer batteries.  
Make sure the thermostat is set to OFF position.  
Use a coin to remove battery door (see Fig. 13).  
Install the fresh batteries as shown, making sure positive  
and negative terminals are oriented correctly (see Fig. 14).  
Replace battery door.  
T8132 Models  
As the batteries are running low, a “bAt Lo” indicator  
will flash for one to two months before batteries run out  
completely. Replace the batteries as soon as possible after  
the indicator starts flashing. If the batteries are not replaced  
sometime during the flashing “bAt Lo” indicator, the indi-  
cator will eventually stop flashing. When the batteries are  
almost completely dead, “bAt Lo” will stay on without  
flashing to indicate the thermostat and heating/cooling  
system have stopped working.  
NOTE: These thermostats do not have a setting for steam/  
gravity air. Cycles would not be long enough for accu-  
rate temperature control.  
NOTE: For condensing furnaces, follow manufacturer  
instructions.  
If you want a longer on-length, readjust the screws as  
follows (refer to the heating system table in Fig. 12):  
The thermostat will not function after the batteries are  
completely dead, and the “bAt Lo” indicator will disappear,  
leaving a completely blank display.  
Press down on left ends of batteries to remove. If the  
new batteries are inserted within 20-30 seconds of remov-  
ing the old ones, the thermostat will not require reprogram-  
ming. However, if the display is blank, the batteries are  
dead or incorrectly installed and the thermostat requires  
reprogramming. See owner’s manual to reprogram.  
If on-length screws A,B For longer on-length,  
are adjusted to match  
this system:  
readjust screws A,B  
to match this system:  
Electric furnace  
Warm air furnace  
Hot water boiler  
Warm air furnace  
INSTALL BATTERIES  
T8131 Models  
When the batteries are running low, the LED will display  
“bAtLo” only when 24 Vac is not present, indicated by an  
unlit LED.  
IMPORTANT: All T8132 models require batteries for  
programming and operation of the thermostat and  
heating/cooling system. Batteries are optional for  
T8131 models, but are recommended to retain pro-  
gram memory if ac power is lost.  
6
8-0148—1  
6
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T8131A,B,C;T8132A,B,C  
IN STALLAT IO N  
IMPORTANT: Although the thermostat has a low battery  
indicator, replace the batteries once a year to pre-  
vent the thermostat from losing time and program  
due to lack of battery power.  
Fig. 14—Installing position for batteries.  
INSTALL TWO AA ALKALINE  
BATTERIES AS SHOWN  
Fig. 13—Removing the battery door.  
REMOVING  
BATTERY  
DOOR  
M1713  
MOUNTING THE THERMOSTAT  
To mount the thermostat on the subbase, engage the tabs  
at the top of the thermostat and mounting plate (see Fig. 14)  
and then press the lower edge of the case to latch.  
M1719C  
Fig. 15—Mounting the thermostat on the subbase.  
A. ENGAGE TABS AT TOP OF  
B. PRESS LOWER EDGE  
OF CASE TO LATCH.  
NOTE:  
THERMOSTAT AND MOUNTING PLATE.  
FOR T8131A, C AND  
T8132A, C, SWING  
OPEN COVER.  
CHECK  
OPERATION.  
M9366  
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68-0148—1  
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T8131A,B,C;T8132A,B,C  
PROGRAMMING THE THERMOSTAT  
Programming the Thermostat  
T8131A AND T8132A MODELS  
Set Current Time/Day  
To set time, press and release Set Clock/Day once, then  
press Ahead or Back until the current time displays. To set  
day, press and release Set Clock/Day again, and then press  
Ahead or Back until the current day displays; then press  
Run Program.  
T8131B AND T8132B MODELS  
Set Current Time/Day  
To set time, press and release Clock/Day once, then  
press Time or until current time displays. To set day,  
press and release Clock/Day again, and then press Time ▲  
or until current day displays; then press Run Program.  
Heating Program  
Heating Program  
With system switch at HEAT, press and release Sched-  
ule once. “WAKE,” Mon-Fri and “SET” appear on the  
display.  
Press Time  or  to program “WAKE” time and  
Temp or to program “WAKE” temperature for Mon-  
Fri. Repeat this sequence for “LEAVE,” “RETURN,” and  
“SLEEP.”  
Press Schedule until “SAT SUN,” “WAKE” and “SET”  
appear on the display. Then press Time or to program  
“WAKE” time and Temp  or  to program “WAKE”  
temperatureforSat-Sun. Repeatthissequencefor“SLEEP.”  
With the system switch at HEAT, press and release Set  
Schedule once. “WAKE,” Mon-Fri and “SET” appear on  
the display.  
Press Ahead or Back to program “WAKE” time and  
Warmer or Cooler to program “WAKE” temperature for  
Mon-Fri. Repeat this sequence for “LEAVE,” “RETURN,”  
and “SLEEP.”  
Press Set Schedule until “SA SU,” and “SET” appear  
on the display. Then press Ahead or Back to program  
“WAKE”timeandWarmerorCoolertoprogram“WAKE”  
temperatureforSat-Sun. Repeatthissequencefor“SLEEP.”  
Cooling Program  
Cooling Program  
With system switch at COOL, follow the same instruc-  
tions as for Heating Program section.  
After programming, adjust fan and system switches as  
desired. Press and release Run Program to start the  
program.  
With the system switch at COOL, follow the same  
instructions as for Heating Program section.  
After programming, adjust the fan and system switches  
as desired. Press and release Run Program to start the  
program.  
A Quick Guide for Operating or Making Changes  
A Quick Guide for Operating or Making Changes  
NOTE: System switch must be set to Heat or Cool to  
perform the following.  
NOTE: System switch must be set to Heat or Cool to  
perform the following.  
To temporarily change the temperature for the current  
period only, press Temp or . The temporary indicator  
will show on the display and will cancel itself at the next  
scheduled change. To cancel sooner, press Run Program.  
To hold a temperature indefinitely, press Hold Temp,  
then Temp  or . To cancel, press Run Program.  
To check current temperature setting, press Run Pro-  
gram. (If using TEMPORARILY CHANGE or HOLD,  
pressing this key will cancel the change.)  
To check programs, press Schedule repeatedly to see  
each time and temperature; then press Run Program.  
To cancel a program, press Schedule until program to  
cancel shows; then press Time  and  together.  
To permanently change a program, repeat steps in Heat-  
ing Program or Cooling Program section as applicable.  
To Return to the normal program or the start program,  
press Run Program.  
To temporarily change the temperature for the current  
period only, press Warmer or Cooler. The temperature  
will cancel itself at the next scheduled change. To cancel  
sooner, press Run Program.  
To hold a temperature indefinitely, press Hold Temp  
then Warmer or Cooler. To cancel, press Run Program.  
To check current temperature setting, press Run Pro-  
gram. (If using TEMPORARILY CHANGE or HOLD,  
pressing this key will cancel the change.)  
To check programs, press Set Schedule repeatedly to  
see each time and temperature; then press Run Program.  
To cancel a program, press Set Schedule until the  
program to cancel shows; then press Ahead and Back  
together.  
To permanently change a program, repeat steps in Heat-  
ing Program or Cooling Program section as applicable.  
To Return to the normal program or the start program,  
press Run Program.  
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T8131A,B,C;T8132A,B,C  
PROGRAMMING THE THERMOSTAT  
T8131C AND T8132C MODELS  
A Quick Guide for Operating or Making Changes  
Set Current Time/Day  
To set time, press and release Set Clock/Day once, then  
press Ahead or Back until current time displays. To set  
day, press and release Set Clock/Day again, and then press  
Ahead or Back until current day displays; then press Run  
Program.  
NOTE: System switch must be set to Heat or Cool to  
perform the following.  
To temporarily change the temperature for the current  
period only, press Warmer or Cooler. The temperature  
will cancel itself at the next scheduled change. To cancel  
sooner, press Run Program.  
Heating Program  
With system switch at HEAT, press and release Week-  
day Schedule once. “WAKE,” Mon-Fri and “SET” appear  
on the display.  
Press Ahead or Back to program “WAKE” time and  
Warmer or Cooler to program “WAKE” temperature for  
Mon-Fri. Repeat this sequence for “LEAVE,” “RETURN,”  
and “SLEEP.”  
To hold a temperature indefinitely, press Hold Temp  
then Warmer or Cooler. To cancel, press Run Program.  
To check current temperature setting, press Present  
Setting.  
To check programs, press Weekday Schedule then  
Weekend Schedule repeatedly to see each time and tem-  
perature; then press Run Program.  
Press Weekend Schedule until “SAT SUN,” “WAKE”  
and “SET” appear on the display. Then press Ahead or  
Back to program “WAKE” time and Warmer or Cooler to  
program “WAKE” temperature for Sat-Sun. Repeat this  
sequence for “SLEEP.”  
To cancel a program, press Weekday Schedule then  
Weekend Schedule until the program to cancel shows;  
then press Clear.  
To check usage, press Usage for the length of time heat  
or air conditioning has been running today since midnight.  
Press this key again for yesterday’s usage, and again for  
cumulative usage. Press Clear to clear cumulative reading  
if desired; then press Run Program.  
To permanently change a program, repeat steps in Heat-  
ing Program or Cooling Program section as applicable.  
To Return to the normal program or the start program,  
press Run Program.  
Cooling Program  
With system switch at COOL, follow the same instruc-  
tions as for Heating Program section.  
After programming, adjust fan and system switches as  
desired. Press and release Run Program to start the  
program.  
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T8131A,B,C;T8132A,B,C  
CHECKOUT AND SETTINGS  
Checkout and Settings  
CHECKOUT  
After the thermostat is mounted on the subbase, check operation as follows:  
Model  
Heating  
A,C  
B
For T8131 models only, first check that the green power LED is lit, indicating the  
thermostat is powered properly.  
Cool  
Off  
Heat  
Do not check heating system operation by jumpering thermostat terminals at the  
primary control, such as the gas valve, zone valve, or oil burner control. This will  
damage the thermostat.  
Auto  
On  
Move the system switch to HEAT and the fan switch to AUTO.  
Temp  
Temp  
Press key until the setting is about 10° F [6° C] above room temperature. After a  
short delay, heating should start and the fan should run (immediately if fan  
operation switch is set in E position).  
Warmer  
Press key until setting is about 10° F [6° C] below room temperature. The heating  
equipment should shut off.  
Cooler  
Cooling  
A,C  
B
For T8131 models only, before continuing check that the green LED is lit,  
indicating the thermostat is powered properly.  
To avoid possible compressor damage, do not operate the cooling system when  
outside temperature is below 50° F [10° C]. See compressor manufacturer  
instructions for further information.  
Cool  
Off  
Heat  
Auto  
On  
NOTE: When cooling setting is changed, thermostat may delay up to five  
minutes before turning on the air conditioner to protect the compressor.  
Move the system switch to COOL and the fan switch to AUTO.  
Temp  
Temp  
Press key until setting is about 10° F [6° C] below room temperature. The cooling  
equipment and fan should start  
Cooler  
Press key until the setting is about 10° F [6° C] above room temperature. The  
cooling equipment and fan should stop.  
Warmer  
Move the system switch to OFF with the fan switch remaining at AUTO. The  
system and fan should be off.  
Cool  
Off  
Heat  
Auto  
On  
6
8-0148—1  
10  
href="
T8131A,B,C;T8132A,B,C  
CHECKOUT AND SETTINGS • TROUBLESHOOTING  
SETTINGS AND ADJUSTMENTS  
Set the Fan and System Switches  
Auto  
Auto  
On  
On  
First set the fan switch  
FAN AUTO: Normal setting for most homes. A single-speed  
fan will turn on automatically with the air conditioner or  
furnace. A two-speed fan will usually run on high with the  
air conditioner and on low with the furnace.  
FAN ON: The fan runs continuously. Use for improved air  
circulation during special occasions or for more efficient  
electronic air cleaning.  
Cool  
Off  
Heat  
Then set the system switch.  
COOL: The thermostat controls the air conditioning system.  
OFF: Both the heating and air conditioning systems are off.  
HEAT: The thermostat controls the heating system.  
Cool  
Cool  
Off  
Off  
Heat  
Heat  
Troubleshooting  
IF…  
THEN…  
Display will not come on.  
T8131  
Check that green LED is lit.  
T8132  
Set the system switch to OFF; remove batteries; insert backward for at least  
five seconds to reset thermostat; replace batteries correctly. Display should  
come on.  
Make sure batteries are fresh and installed correctly.  
Temperature display will not go  
lower than 45° F [7° C] or higher  
than 88° F [31° C] during  
programming.  
T8131/T8132  
 The temperature setting limit has been reached. The setting range is 45° F  
to 88° F [7° C to 31° C].  
Heating will not come on.  
T8131  
Check that green LED is lit.  
T8132  
If display is blank or says “bAt Lo,” install fresh batteries.  
T8131/T8132  
Check that switch on thermostat is set to HEAT.  
Check the system fuse or circuit breaker and replace or reset if necessary.  
If temperature setting is higher than current temperature, and SYSTEM  
ON indicator is lit, see furnace manufacturer instructions.  
Cooling will not come on.  
T8131  
Check that green LED is lit.  
T8132  
If display is blank or says “bAt Lo,” install fresh batteries.  
If 2- or 4-wire installation, verify that R-Rc jumper is installed.  
T8131/T8132  
Check that switch on thermostat is set to COOL.  
Check the system fuse or circuit breaker and replace or reset if necessary.  
The thermostat has a built-in time delay on cooling. Allow five to ten min-  
utes after changing the setting before the air conditioner starts.  
If temperature setting is lower than current temperature, and SYSTEM ON  
indicator is lit, move system switch from COOL to OFF for ten minutes.  
1
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68-0148—1  
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T8131A,B,C;T8132A,B,C  
TROUBLESHOOTING • CROSS REFERENCE  
Cooling will not come on (Continued).  
After ten minutes, return switch to COOL position. If air conditioner comes  
on, compressor may have reached its high limit temperature protection and  
shut down. If air conditioner does not come on after the ten minutes and the  
SYSTEM ON indicator is lit, see air conditioner manufacturer instructions.  
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. Check to make sure system on-  
length is set correctly according to instructions on page 6.  
Furnace or air conditioner cycles  
too frequently.  
 Check system setting on back of thermostat.  
The system on-length  
is too short or too long.  
 Readjust according to instructions on page 6.  
The thermostat current setting does  
not match the display temperature.  
 Check that the wiring hole in the wall behind the wallplate has been plug-  
ged 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 occasionally.  
Cross Reference  
T8131/T8132 CROSS REFERENCE CHART.  
T8131/T8132  
Trade  
Replacement  
Model  
Number  
Description  
Remarks  
T8131 models:  
®
C1004  
C1012  
Honeywell logo; TRADELINE model.  
T8131C1004  
T8131C1012  
®
Honeywell logo; TRADELINE model;  
Premier White™.  
T8132 models:  
A1007 Honeywell logo; Honeywell Canada  
T8132C1003 °F only.  
®
TRADELINE model; configurable  
for °F/°C.  
T8132C1011 Replacement is Premier White™, °F only.  
A1015 Carrier Weathermaker logo; Carrier part  
no. HH07AX017; Fixed 6CPH.  
T8132C1003  
T8132C1011 Replacement is Premier White™.  
T8132C1003 °F only.  
A1023 Enerplus logo; configurable for °F/°C.  
T8132C1011 Replacement is Premier White™; °F only.  
T8132C1003 Replacement has a keyboard door.  
B1005  
Zone Perfect logo; Carrier part  
no. HH07AX016; Fixed 6 CPH.  
T8132C1011 Replacement has a keyboard door and is  
Premier White™.  
®
C1003  
C1011  
Honeywell logo; TRADELINE model.  
T8132C1003  
T8132C1011  
®
Honeywell logo; TRADELINE model;  
Premier White™.  
Home and Building Control  
Home and Building Control  
Helping You Control Your World  
Honeywell Inc.  
Honeywell Limited—Honeywell Limitée  
740 Ellesmere Road  
1
985 Douglas Drive North  
Golden Valley, MN 55422  
Scarborough, Ontario  
M1P 2V9  
QUALITY IS KEY  
PrintedinU.S.A.  

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