Honeywell T8131C 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

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 1- 94 • ©Honeywell Inc. 1994 • Form Number 66 88 -- 00 11 44 88 —— 11

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.

[175]

1 [25]

[19]

32]

[

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—

. 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).

. 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.

8-0148—1

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:

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.

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.

. 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

Yes^a

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.

Oil-Fired Boilers

Yes^a

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

(120/240 Line Volt)

Heat pumps/Multistage Equipment

Not compatible with any 120/240 volt circuit.

Not designed for steam or gravity systems.

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.

68-0148—1

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

WIRES THROUGH

WALL OPENING

WALL

HEATING

MOUNTING

PLATE

(HOT)

RELAY OR

VALVE COIL

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

Plug the hole in the wall with insulation to help prevent

drafts from adversely affecting thermostat operation.

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

FAN

RELAY

(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.

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

M9212

Fig. 7—5-wire heat/cool application.

-WIRE HEAT/COOL

Fig. 4—Proper wiring technique.

PROPER WIRING TECHNIQUE

INSERT

STRAIGHT

[

/16 in.

8 mm]

STRIP

UNDER

SCREW HEAD

END OF WIRE

VISIBLE HERE

M3825

HEATING

RELAY OR

VALVE COIL

FAN

RELAY

COOLING

CONTACTOR

COIL

HOT)

(

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

M9214

8-0148—1

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)

JUMPER

HEATING

RELAY OR

VALVE COIL

HEATING

RELAY OR

VALVE COIL

COOLING

CONTACTOR

COIL

(

HOT)

FAN

RELAY

(

HOT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

M1709B

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).

-WIRE COOL-ONLY (JUMPER INTACT)

5-WIRE HEAT/COOL (JUMPER REMOVED)

JUMPER

COOLING

CONTACTOR

COIL

HEATING

RELAY OR

VALVE COIL

FAN

RELAY

FAN

RELAY

(

HOT)

COOLING

CONTACTOR

COIL

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

M848A

(HOT)

(

HOT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

M1711B

68-0148—1

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

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

HEATING SYSTEM

WARM AIR A–IN B–IN

FURNACE

HOT WATER A–OUT B–IN

POSITION

TURN

HEATING SYSTEM

WARM AIR A–IN B–IN

FURNACE

HOT WATER A–OUT B–IN

POSITION

BOILER

TURN

BOILER

1 TURN

ELECTRIC

FURNACE

A–IN

B–OUT

ELECTRIC

FURNACE

A–IN

B–OUT

TURN

FUEL SWITCH

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.

8-0148—1

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

68-0148—1

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

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

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

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.

8-0148—1

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.

68-0148—1

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

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

Move the system switch to HEAT and the fan switch to AUTO.

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

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

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

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

8-0148—1

T8131A,B,C;T8132A,B,C

CHECKOUT AND SETTINGS • TROUBLESHOOTING

SETTINGS AND ADJUSTMENTS

Set the Fan and System Switches

Auto

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

Off

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.

68-0148—1

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

Helping You Control Your World

Honeywell Inc.

Honeywell Limited—Honeywell Limitée

740 Ellesmere Road

985 Douglas Drive North

Golden Valley, MN 55422

Scarborough, Ontario

M1P 2V9

QUALITY IS KEY

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