Honeywell CT8602 User Manual 2

Honeywell CT8602

PROGRAMMABLE THERMOSTAT

OWNER’S GUIDE

Seven Day
Programmable Heat and/or Cool
Low Voltage (20 to 30 Vac) Thermostat and Wallplate
Model CT8602

Para obtener un documento con las instrucciones en español, por favor visite
nuestro sitio de web a: www.honeywell.com/yourhome
Pour obtenir des notices techniques en français, veuillez consulter notre site
web: www.honeywell.com/yourhome

.

Table of Contents

Step 1. Prepare for Installation ............................................................................................................................................... 5

Step 2. Remove Old Thermostat ............................................................................................................................................ 5

Step 3. Mount Thermostat Wallplate ...................................................................................................................................... 6

Step 4. Wire Wallplate Terminals ........................................................................................................................................... 7

Step 5. Install the Batteries .................................................................................................................................................... 8

Step 6. Set Fan Operation Switch .......................................................................................................................................... 9

Step 7. Mount the Thermostat ............................................................................................................................................... 10

Step 8. Customize Your Thermostat ...................................................................................................................................... 10

Step 9. Set the Clock ............................................................................................................................................................. 14

Step 10. Programming ........................................................................................................................................................... 14

Step 11. Operating Your Thermostat ...................................................................................................................................... 17

Step 12. Set the Fan and System Switches ........................................................................................................................... 19

If You Have a Problem ........................................................................................................................................................... 20

Wiring Diagrams .................................................................................................................................................................... 22

® U.S. Registered Trademark
Copyright © 2004 Honeywell International Inc.
All Rights Reserved

.

69-1532-2

Total comfort temperature management with Smart Response™ Technology

Y

T
S

Congratulations! You made a smart choice by purchasing your new Honeywell thermostat; the smart thermostat that:

• Keeps you comfortable by automatically calculating exactly when the furnace or air conditioning should go on to
have the house at the desired comfort temperature by the time you wake up or return home.

• Saves the maximum amount of energy and money by automatically remembering to adjust the temperature when
you leave home or go to sleep.

• Provides the ultimate in comfort and convenience. It comes preprogrammed. You can use the preprogrammed
schedule, or set your own.

This manual answers many of the questions that can arise as you become familiar and comfortable with your
Honeywell thermostat — the state of the art in home comfort controls.

Read these instructions carefully. Failure to follow these instructions can damage the product or cause a hazardous
condition.

MERCURY NOTICE

If this thermostat is replacing a control that contains mercury in a sealed
tube, do not place your old control in the trash. Contact your local waste
management authority for instructions regarding recycling and the proper
disposal of this control, or of an old control containing mercury in a sealed
tube.

YPICAL LOCATION OF A MERCURY
WITCH IN A THERMOSTAT

MERCUR
SWITCH

M10614

69-1532—2 2

S

I

NCREASE TIME SETTING

O
T
A

R SCROLL FORWARD
HROUGH INSTALLER SETUP
ND SYSTEM TEST

SET CURRENT
DAY AND TIME

RETURN TO
NORMAL
OPERATIONS

ENTER
INDEFINITE
OR TIMED
HOLD MODE

SET CURRENT OR
PROGRAM DAY

CHANGE BETWEEN
DAYLIGHT SAVINGS
AND STANDARD TIME

SET WAKE TIMES
AND SETPOINTS

Set Current

Run

Program

Hold Temp

COPY ONE PROGRAMMED
DAY TO ANOTHER DAY

Day/Time

Day

Daylight

Time

SET LEAVE TIMES
AND SETPOINTS

Time Set Program

Wake

Heat/Cool

Settings

Copy

DECREASE TIME SETTING OR
SCROLL BACKWARD THROUGH
INSTALLER SETUP AND SYSTEM TEST

SET RETURN TIMES
AND SETPOINTS

Leave

System

Fan

Return Sleep

Off CoolHeat

On Auto

INCREASE TEMPERATURE
SETTING OR SCROLL
FORWARD THROUGH
INSTALLER SETUP OPTIONS

DECREASE TEMPERATURE
SETTING OR SCROLL
BACKWARD THROUGH
INSTALLER SETUP OPTION

DISPLAY INFORMATION
SUCH AS PRESENT
SETTINGS AND OUTDOOR
TEMPERATURE

SET SLEEP TIMES
AND SETPOINTS

SYSTEM SWITCH

FAN SWITCH

CHANGE BETWEEN
HEATING AND COOLING
SETPOINTS

M14880

3 69-1532—2

.

S
R
I
T
T
C
P

SHOWS WHEN THERMOSTAT IS

S
P
A
H

IN THE PROGRAMMING MODE

HOWS THERMOSTAT IS
ROCESSING INFORMATION
ND WAITING TO CALL FOR

EAT OR COOL

HOWS SMART
ESPONSE

S CHANGING

HE TEMPERATURE
O MEET THE
URRENT
ROGRAMS

SHOWS
VACATION
HOLD
DURATION

SHOWS CURRENT
DAY OR DAYS
BEING
PROGRAMMED

SHOWS CURRENT
PROGRAM PERIOD
OR PERIOD BEING
PROGRAMMED

Wait

Set Program Set Day/Time

Recovery

Hold for

Mon

Tue Wed Thu Fri Sat Sun

Wake Leave Return Sleep

SHOWS THE BATTERIES
ARE LOW AND MUST BE
REPLACED

SHOWS SYSTEM ON
DAYLIGHT SAVINGS TIME

DISPLAYS EITHER CURRENT
TIME OF DAY OR PROGRAM TIMES

SHOWS TEMPERATURE SETTING
CHANGED FOR THIS PROGRAM PERIOD

Temporary Setting

AM

Days

Repl Batt

Room

Filter

DST

SHOWS THE TEMPERATURE
DISPLAYED IS THE CURRENT
ROOM TEMPERATURE

SHOWS THE TEMPERATURE
DISPLAYED IS THE CURRENT
SET TEMPERATURE

System

Heat

Off

Cool

DISPLAYS
EITHER ROOM
OR SET
TEMPERATURES

SHOWS CURRENT
SYSTEM SWITCH
POSITION
HEAT/OFF/COOL

SHOWS THAT
THERMOSTAT IS
"CALLING" FOR
HEAT OR COOL

SHOWS SMART
RESPONSE IS OFF
CONVENTIONAL
RECOVERY IS ON

M18746

69-1532—2 4

STEP 1. PREPARE FOR INSTALLATION

H

❑ Check the contents of your thermostat package to be sure all items are included.

Package Contents

• Thermostat • Wallplate • Owner’s Guide

• Wiring labels • Screws and anchors

❑ Locate the required tools to install your thermostat.

Tools Required

• Screwdriver • Drill • Drill bits: 3/16 in. for drywall;

• Hammer • Needle-nose pliers 7/32 in. for plaster

• Level

STEP 2. REMOVE OLD THERMOSTAT

❑ Test your heating and cooling systems to make sure they work properly. If either system does not work, contact

your local heating/air-conditioning dealer. To avoid compressor damage, do not operate the cooling system when
outdoor temperature is below 50°F (10°C).

❑ Turn off power to the system at the furnace or the fuse/circuit breaker panel.
❑ Carefully unpack your new thermostat and wallplate. Save package of screws, instructions, and receipt.
❑ Remove the cover from the old thermostat. If the cover does not snap off when pulled firmly from the bottom, check

for a screw or screws used to lock on the cover.

❑ Loosen the screw or screws holding the thermostat to the wallplate and lift the thermostat away.
❑ Disconnect the wires from the old thermostat. As you disconnect each wire, attach the enclosed labels with the old

terminal designation. If there are only two wires, they do not need to be labeled. Wrap the wires around a pencil as
shown to keep them from falling back into the wall.

Special Installations

Read this section if you are replacing:

• Clock thermostat with separate wires for the clock.

• Thermostat with six or more wires connected to it.

• Thermostat in a heating only system with three wires.

5 69-1532—2

WIRES THROUG
WALL OPENING

M5136

Replacing a Clock Thermostat that has C or C1 Clock Terminals

When replacing a Honeywell Chronotherm® Thermostat, you may find one or two wires going to the C or C1 clock
terminals on the Chronotherm wiring wallplate. Do not allow them to touch, or you can damage the transformer.
Disconnect the wires and wrap them separately using electrical tape. Do not wrap them together. Place the wires
where they will not interfere with the operation of the new thermostat. Record the colors and terminal designation
labels of the remaining wires.

Replacing a Thermostat that has Six or More Wires

If there are six or more wires (excluding clock wires attached to terminals), you probably have a variation of a
multistage heat pump or other multistage system. This thermostat is not compatible with multistage systems, so return
the product to the place of purchase. For information about which programmable thermostats will work with your
system, call Honeywell Customer Care at 1-800-468-1502.

Replacing a Thermostat that has Three Wires

If you have three wires for a heating only system and can operate the fan using the fan On switch this thermostat works
with your system. However, some hot water (zoned) heating systems also have three wires. Your thermostat will work
only if you install an isolating relay on these systems. For details, call your local heating and/or cooling contractor.

STEP 3. MOUNT THERMOSTAT WALLPLATE

❑ Separate wallplate from thermostat by placing your thumbs between bottom of wallplate

and thermostat and pulling wallplate up and away from thermostat. See illustration.

❑ Position wallplate on wall. Level wallplate

for appearance, if desired. Use a pencil to mark
two mounting holes that best fit the application.

❑ Remove wallplate from wall. Drill two 3/16 in.

holes in wall (if drywall) as shown.
For plaster or wood, drill 7/32 in. holes as
marked. Gently tap (provided) anchors into
drilled holes until flush with wall.

❑ Reposition wallplate over holes. Pull wires

through wiring opening. Loosely insert mounting
screws into each of the holes.

❑ Level wallplate, if desired. Thermostat

functions correctly, even when not level.

❑ Tighten mounting screws.

69-1532—2 6

WALL
ANCHORS (2)

WIRES
THROUGH WALL

WALL

MOUNTING
HOLES

MOUNTING
SCREWS

M15044

M16427

STEP 4. WIRE WALLPLATE TERMINALS

6

F
I
7

IMPORTANT

All wiring must comply with local codes and ordinances.
If unsure about household wiring procedures, call your
local heating/air-conditioning contractor.

Refer to the labels you placed on the wires when you removed
the old thermostat (see illustration).

❑ Match the letter of old thermostat wire with the corresponding

terminal letter on new thermostat. Refer to Table 1.

❑ Remove factory-installed jumper connecting terminals R and

RC if wires are connected to both of those terminals.

❑ For wiring diagrams, if needed, see Wiring Diagrams section.
❑ Loosen terminal screws. Slip each wire beneath matching

terminal. Wraparound and straight connections are both
acceptable, (see illustration). Tighten terminals.

❑ Plug the hole in the wall with insulation to help prevent

drafts from adversely affecting thermostat operation.

OR WRAPAROUND

NSERTION STRIP

/16 IN. (11 MM).

FOR STRAIGHT INSERTION
STRIP 5/16 IN. (8 MM).

M482

R

W

Y

G

M16425

7 69-1532—2

Table 1. Terminal Designations on Old and New Thermostats.

2

Terminal on Old Thermostat Connect To Description

a

R, RH

, 4, V

a

Rc, R

, H W Heat

W, W

1

, M Y Cooling

Y, Y

1

RPower

Rc Power for cooling

G, F G Fan

O O Changeover in cool. (Single stage heat pump only).

b

B

c

C

W

Y

a

b

c

b

, Xc, B

, H

2

2

2

If both RH and R terminals are present on existing thermostat, remove jumper and connect Rh to R and R to Rc.
Do not connect both O and B when wiring to a single stage heat pump. Connect O to O. Tape off B.
Tape off end of the wire with electrical tape and push the taped wire back into the wiring hole in the wall.

b

B

Changeover in heat. (Single stage heat pump only).

Do not connect. Transformer common

Do not continue installation.
Call 1-800-468-1502.

Second stage heat.

Second stage cool.

STEP 5. INSTALL THE BATTERIES

IMPORTANT

Three fresh AA alkaline batteries must be installed for pro­gramming and operation of the thermostat and the heating/
cooling system.

❑ Install the batteries in the wallplate so the positive terminals all

point up (see illustration).

❑ If the thermostat is already mounted on the wall, remove the

thermostat by placing your thumb between the thermostat and
wallplate and pulling the thermostat up and away as shown
on the next page.

69-1532—2 8

WALLPLATE

B

RRCOWYG

INSTALL 3 AA ALKALINE BATTERIES
AS SHOWN, POSITIVE (+) TERMINALS
TOWARD TOP.

M1062

❑ When the batteries are running low, a REPL BAT message flashes for one

6

to two months before the batteries run out completely. Replace the
batteries as soon as possible once the message flashes.

IMPORTANT

Although the thermostat has a low battery indicator, replace the
batteries once per year to prevent leakage and to prevent the ther­mostat and heating/cooling system from shutting down due to lack
of battery power in the thermostat.

❑ If you insert new batteries within 20 to 30 seconds of removing the old

batteries, the system retains the current time and day. If the display is
blank, the batteries are dead or installed incorrectly. You must reset the
time and day. Refer to Step 9. Set the Clock for instructions.

60

60

70

change batteries before leaving to prevent the system from

90

80

shutting down due to lack of power. Always use fresh alkaline

As a precaution when leaving home for longer than a month,

80

70

90

batteries. Nonalkaline batteries do not last as long and can
leak, causing damage to the thermostat and the wall surface.

STEP 6. SET FAN OPERATION SWITCH

The thermostat fan operation switch, labeled FUEL SWITCH, is factory
set in the F position. This is the correct setting for most systems. If your
system is an electric heat system, set the switch to E. The E setting
allows the fan to turn on immediately with the heating and cooling in a
system where the G terminal is connected.

M16424

FUEL SWITCH

M1267

9 69-1532—2

STEP 7. MOUNT THE THERMOSTAT

A

A

O
A

. ENGAGE TABS AT TOP

F THERMOSTAT
ND WALLPLATE.

B. PRESS LOWER

EDGE OF CASE
TO LATCH.

STEP 8. CUSTOMIZE YOUR THERMOSTAT

Your Honeywell CT8602 Thermostat comes preset to the most commonly used settings. The settings are:

• Gas or oil forced air furnace.

• Smart Response Technology on.

• Temperature °F.

• 12-hour clock format.

You can change any or all of these settings.

IMPORTANT

❑ Press and hold down , , and simultaneously until the display shows two numbers.

Always press the keys with your fingertip or a similar blunt tool. Sharp instruments like pens and pencil
points can damage the keyboard.

You now can change any of these settings.

M12703

69-1532—2 10

System Type (Feature Number 4)

1

2

0

System type options are:
— 1 = Gravity or steam system.
— 3 = Hot water, high efficiency furnace (90% or better), or single stage heat pump.
— 6 = Gas or oil forced air furnace (preset).
— 9 = Electric furnace.

To change your system type:
❑ Press until display shows your furnace or boiler type.

Run

❑ Press Time to move to next feature or to return to main display.

Program

Smart Response™ Technology (Feature Number 13)

Smart Response Technology options are:
— 0 = Smart Response Technology on (preset).
— 1 = Smart Response Technology off.

To turn Smart Response Technology on or off:
❑ Press once.

Run

❑ Press Time to move to next feature or to return to main display.

Program

NOTE: See Smart Response Technology section for information about this feature.

Temperature Format (Feature Number 14)

Temperature format options are:
— 0 = °F (preset).
—1 = °C.

To change temperature format:
❑ Press once.

Run

❑ Press Time to move to next feature or to return to main display.

Program

FEATURE
NUMBER

OPTION

M1875

M1875

M1875

11 69-1532—2

Time Format (Feature Number 16)

3

8

4

Time format options are:
— 0 = 12-hour clock (preset).
— 1 = 24-hour clock.

To change time format:
❑ Press once.

Run

❑ Press Time to move to next feature or to return to main display.

Program

Heating Temperature Range Stops (Feature Number 34)

Temperature range options are:
— 90 = highest setting for heating setpoint (preset).
— 40 to 89 = temperature range (1°F increments) of heating setpoint settings.
❑ Press or until the display shows the desired heating temperature range

stop.

❑ Press Time to move to next feature or to return to main display.

Run

Program

Cooling Temperature Range Stops (Feature Number 35)

Temperature range options are:
— 45 = lowest setting for cooling setpoint (preset)
— 46 to 99 = temperature range (1°F increments) of cooling setpoint settings.
❑ Press or until the display shows the desired cooling temperature range

stop.

❑ Press Time to move to next feature or to return to main display.

Run

Program

Factory Set Function (Feature Number 37)

Do not change this setting.

Run

❑ Press Time to move to next feature or to return to main display.

Program

M1875

M1874

M18749

M1875

69-1532—2 12

Furnace Air Filter Timer (Feature No. 43)

7

6

Filter timer options:
0 = off
1 = 30 days
2 = 90 days (preset)
3 = 180 days
4 = 365 days

M19600

To change your filter timer:
❑ Press until the display shows the desired number of days.

Run

❑ Press Time to move to next feature or to return to main display.

Program

NOTE: The filter time is based on calendar days.

Humidifier Pad Timer (Feature No. 44)

Humidifier pad timer options:
0 = off (preset)

1 = 90 days
2 = 180 days
3 = 365 days

To change your humidifier pad timer:

M2024

❑ Press until the display shows the desired number of days.

Run

❑ Press Time to move to next feature or to return to main display.

Program

NOTE: The humidifier pad time is based on calendar days. See your humidifier instructions for complete details on

replacing and/or cleaning your humidifier pad.

Ultraviolet (UV) Lamp Timer (Feature No. 45)

UV lamp timer options:
0 = off (preset)
1 = 365 days
To change your UV lamp timer:

❑ Press until the display shows the desired number of days.

Run

❑ Press Time to move to next feature or to return to main display.

Program

NOTE: The UV lamp time is based on calendar days. See your UV lamp instructions for complete details on

replacing your UV lamps.

13 69-1532—2

M2024

STEP 9. SET THE CLOCK

t

t

Set Current Day and Time

NOTE: On initial power-up, the screen flashes 1:00 pm until you press a key.

Set Curren

❑ Press .

❑ Press until screen shows current day.

❑ Press Time or until current time shows. (Tapping advances time in one-hour increments.)

❑ Press until “DST” displays if daylight savings time is in effect.

❑ Press .

Day/Time

Day

Daylight

Time

Run

Program

Set Curren

Day/Time

STEP 10. PROGRAMMING

The keyboard is located behind the thermostat cover. The three most frequently used keys are near the display.
Pressing displays the current temperature settings. Pressing the and keys change the temperature. The
thermostat displays day, time, program period, temperature, system and fan settings.

There is an individual key for each of the four program periods:

Wake

— —The program period when the house is at a comfortable temperature while you get ready for work or

school. (This is a higher temperature during heating season and a lower temperature during cooling season.)

Leave

— —The program period you can set for an energy-saving temperature while you are away at work or school.

(This is a lower temperature during heating season and a higher temperature during cooling season.)

— —The program period when you want the house at a comfortable temperature for activities before bedtime.

Return

(This is a higher temperature during heating season and a lower temperature during cooling season.)

— —The program period you can set for an energy-saving temperature while you are sleeping. (This is a lower

Sleep

temperature during heating season and a higher temperature during cooling season.)

69-1532—2 14

— Table 2 shows the default temperature settings.

Table 2. Default Temperature Settings.

Period Time Heating

a

Temperature Coolingb Temperature

Wake 6:00 AM 70°F/21°C 78°F/25.5°C

Leave 8:00 AM 62°F/16.5°C 85°F/29.5°C

Return 6:00 PM 70°F/21°C 78°F/25.5°C

Sleep 10:00 PM 62°F/16.5°C 82°F/28°C

a

Your heating setpoints cannot be higher than 90°F (32°C) or lower than 40°F (4.5°C).

b

Your cooling setpoints cannot be higher than 99°F (37°C) or lower than 45°F (7°C).

Program the First Day

Start by programming the wake time and temperature for one day.

❑ Press and release .

❑ Press until the desired day displays (Mon, Tue, Wed, Thu, Fri, Sat, Sun).

Day

❑ Press time or until the desired time shows in the display.

NOTE: Program times are in 15 minute intervals. For example, 8:00, 8:15, 8:30.

❑ Press or until the desired wake temperature displays.

The setpoint temperature range is 40°F to 90°F (4.5°C to 32°C) for heating and 45°F to 99°F (7°C to 37°C) for cooling.

Heat/Cool

❑ Press to switch between setpoints.

Settings

Wake

NOTE: Program times are the same for heating and cooling.

15 69-1532—2

❑ Press or until the display shows the desired temperature setpoint.

M13327

M13328

9

Leave

❑ Press , or and repeat these steps for each program period. The First Day is now

Return

Sleep

programmed.

❑ Repeat each step in Program the First Day for the rest of the week.

NOTE: After the first day is programmed, you can copy that day to any other day using procedure in Copy a Day.

Run

❑ Press when the entire week is programmed.

Program

Copy a Day

Your thermostat can copy program settings from one day to another.

Leave

❑ Press , , or to enter programming mode.

❑ Press until the display shows the day you want to copy.

❑ Press .

Wake

Day

Copy

Return

Sleep

Mon

❑ Press until the display shows the day you want to copy to.

❑ Press to accept the change.

Day

Copy

❑ Repeat these steps for each day you want to copy.

NOTE: donE appears for two seconds and then the normal program display appears.

69-1532—2 16

Mon

Wed

M1332

Clear a Program Period

NOTE: Wake cannot be cleared.

Leave

❑ Press , , or for the program period you want to clear.

❑ Press until the desired day displays.

❑ Press and hold , , or for approximately three seconds until time and temperature clear.

Return

Day

Leave

Return

Sleep

Sleep

❑ Repeat the above steps for each period to be cleared.

Run

❑ Press .

Program

STEP 11. OPERATING YOUR THERMOSTAT

Change Temperature Setting Until the Next Program Period (Temporary Change)

❑ Press or until the screen shows the desired temperature setting.

NOTE: The temporary temperature setting is displayed for about three seconds and then the room temperature is

displayed. Temporary appears in the display. The setting cancels when the next program period starts or

when you press .

Change Temperature Setting Indefinitely (Hold)

❑ Move the System switch to the desired position (Heat or Cool).

❑ Press then or to change your setting if desired. (The display changes from showing the setpoint

❑ To cancel “Hold” press .

Hold Temp

temperature to room temperature after approximately three seconds.)

Run

Program

Run

Program

17 69-1532—2

Change the Temperature Setting Until a Designated Day and Period (Vacation Hold)

❑ Press twice.

❑ Press or until display shows desired temperature setpoint.

❑ Press Time until the desired number of days that you will be away (1 through 255) is displayed.

❑ Press , , or to select the program period when you want the program to restart.

NOTE: If Vacation Hold needs to be cancelled before designated time, press to return to the program.

Hold Temp

Wake

Leave

Return

Sleep

Run

Program

Daylight Savings Time Key

This feature allows you to switch between standard time and daylight savings time.

Daylight

❑ Press during fall to set the time back one hour.

❑ Press in spring to set time forward one hour. DST is displayed when operating on daylight savings time.

Time

Daylight

Time

NOTE: Pressing Daylight Time key more than once in a five minute period scrolls through various time options.

(One hour earlier or later, with or without DST. Pressing the key six times in a five minute period returns you
to the original setting.

View or Reset Timer Settings

When the thermostat activates a timer, the thermostat flashes Filter until you reset the timer.

❑ Reset the timer by pressing the key until the expired timer is displayed.

❑ Press the Time key to reset the timer.

Run

❑ Press the key.

NOTE: You can view the number of days remaining at any time by pressing the key three or four times. If more

69-1532—2 18

Program

than one timer is active, all active timers show sequentially when pressing the key several times.

For complete instructions on replacing or cleaning your furnace filter, humidifier pad or UV lamp, see the product

F

o

S

ol

owner’s manuals. Contact your local contractor or visit www.honeywell.com/yourhome.

STEP 12. SET THE FAN AND SYSTEM SWITCHES

First set Fan
switch.

Then set System
switch.

Fan On: The fan runs continuously. Use for improved air
circulation or for more efficient central air cleaning. (In a heat-only
system, fan runs continuously only if fan relay is connected to the
G thermostat terminal.)

Fan Auto: Normal setting for most homes. The equipment
controls the fan operation.

Heat: The thermostat controls your heating system.

Off: Both the heating and air conditioning systems are off.

Cool: The thermostat controls your air conditioning system.

19 69-1532—2

Heat Off Co

ystem

On Aut

an

IF YOU HAVE A PROBLEM

Table 3. Solution Guide.

If... Then…

Display does not appear. • Make sure the batteries are fresh and installed correctly.

Temperature settings will not change
(example; cannot set the heating higher
or the cooling lower).

Heating does not come on. • Set the system switch to Heat.

Cooling does not come on. • Set the system switch to Cool.

System on indicator( = heat, =
cool) is lit, but no warm or cool air is
coming from the registers.

Display flashes during programming. The temperature setting limit was reached. Heating setting range is 40°F to

• Make sure the thermostat is mounted and latched on the wallplate.
Mount and latch the thermostat on the wallplate if it is not.

• Make sure the temperature setpoints are:
40°F to 90°F (4.5°C to 32°C) for heating.
45°F to 99°F (7°C to 37°C) for cooling.

• Check Customize Your Thermostat section, Feature Numbers 34 and

35. Reset as necessary.

• Make sure heating setpoint is above room temperature.

• Make sure circuit breaker is not tripped, and reset it if necessary.

• Make sure power switch at equipment is in On position.

• Wait five minutes for the system to respond.

• Make sure the cooling setpoint is below the room temperature.

• Make sure the circuit breaker is not tripped, and reset it if necessary.

• Make sure System switch at air conditioner is in On position.

• Wait five minutes for the system to respond.

Wait five minutes after seeing flame or snowflake and check registers
again. If no hot or cool air is coming from registers, refer to Heating does
not come on or Cooling does not come on. Or contact your local heating
and cooling contractor.

90°F (4.5°C to 32°C). Cooling setting range is 45°F to 99°F (7°C to 37°C).

69-1532—2 20

Table 3. Solution Guide.

If... Then…

Temperature change occurs at the
wrong times.

Thermostat backlight appears dim. • Wait until Replace Battery indicator is illuminated and replace batteries.

• Check the program times for the period in question.

• Make sure the AM and PM settings are correct.

• Make sure the current time and day settings are correct.

• Reprogram any incorrect settings.

NOTE: If your thermostat is set for Smart Response™ technology, the

start times occur before your programmed comfort periods.

• Replace batteries now.

Toll-Free Customer Assistance

Please read and follow the instructions for this thermostat. If you have questions about this thermostat, visit our web
site at www.honeywell.com/yourhome, or call Honeywell Customer Care at 1-800-468-1502.

21 69-1532—2

WIRING DIAGRAMS

6

7

9

Y.

2-WIRE HEAT-ONLY
(JUMPER INTACT)

THERMOSTAT

B

RC

OW Y

R

4-WIRE HEAT/COOL
(JUMPER INTACT)

THERMOSTAT

B

RC

OW Y

G

R

G

HEATING
RELAY OR
VALVE COIL

1 POWER SUPPLY.

PROVIDE DISCONNECT MEANS

AND OVERLOAD PROTECTION AS REQUIRED.

3-WIRE HEAT ONLY WITH FAN

(JUMPER INTACT)

THERMOSTAT

B

RC

OW Y

R

HEATING
RELAY OR
VALVE COIL

1 POWER SUPPLY. PROVIDE

DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.

G

FAN
RELAY

1

M1061

1

M10618

69-1532—2 22

OW Y

3

COMPRESSOR
CONTACTOR

COOLING
CONTACTOR
COIL

G

FAN
RELAY

HEATING
RELAY OR
VALVE COIL

1 POWER SUPPLY. PROVIDE

DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.

4-WIRE SINGLE-STAGE HEAT PUMP

(JUMPER INTACT)

THERMOSTAT

B

RC

R

2

1

COOL
CHANGEOVER
VALVE

POWER SUPPLY. PROVIDE DISCONNECT MEANS

1

AND OVERLOAD PROTECTION AS REQUIRED.

2

USE EITHER O OR B FOR HEAT PUMP CHANGEOVER.

3

USING A JUMPER WIRE (NOT SUPPLIED) CONNECT W TO

FAN
RELAY

HEAT
CHANGEOVER
VALVE

1

M1061

2

M1273

9

5-WIRE HEAT/COOL

8

(JUMPER REMOVED)

THERMOSTAT

B

RC

R

OW Y

5-WIRE HEAT/COOL WITH DAMPER

(JUMPER INTACT)

THERMOSTAT

G

B

RC

OW Y

R

G

HEATING
RELAY OR
VALVE COIL

1

1 POWER SUPPLY. PROVIDE

FAN

COOLING
CONTACTOR

RELAY

COIL

DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.

M1061

1

1

HEAT
DAMPER

POWER SUPPLY. PROVIDE
DISCONNECT MEANS AND
OVERLOAD PROTECTION
AS REQUIRED.

COOL
DAMPER

HEAT
RELAY

COMPRESSOR
CONTACTOR

FAN
RELAY

M1873

Notice:

This thermostat is a Class B digital apparatus that complies with Canadian Radio Interference Regulations,
CRC c. 1374.

23 69-1532—2

1

Limited One-Year 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 Honeywells 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 International Inc. USA Honeywell Canada:
Dock 4 — MN10-3860 Honeywell Limited/Honeywell Limitée
1885 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9

This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or
malfunction was caused by damage which occurred while the product was in the possession of a consumer.

Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL SHALL NOT BE
LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES
RESULTING, DIRECTLY OR INDIRECTLY FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER
FAILURE OF THIS PRODUCT. Some states do not allow the exclusion or limitation of incidental or consequential damages, so this
limitation may not apply to you.

THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY
IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,
IS HEREBY LIMITED TO THE ONE YEAR DURATION OF THIS WARRANTY. Some states do not allow limitations on how long an
implied warranty lasts, so the above limitation may not apply to you.

This warranty gives you specific legal rights, and you may have other rights which vary from state to state.

If you have any questions concerning this warranty, please write Honeywell Customer Care, 1885 Douglas Drive North, Golden Valley,
MN 55422-3992, or call 1-800-468-1502. In Canada, write Retail Products ON30 Honeywell Limited/Honeywell Limitée, 35 Dynamic
Drive, Scarborough, Ontario M1V 4Z9.

Automation and Control Solutions

Honeywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Scarborough, Ontario

69-1532—2 J.S. Rev. 3-04 www.honeywell.com/yourhome

M1V 4Z9

Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.