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DISPLAY WINDOW  
I
DAY DIFFERENTLY  
See pages 1-3 for  
description of keys.  
THE FIRST DAYS PROGRAM TO ALL 7 DAYS  
SIMPLE PROGRAMMING  
It’s easy to program the thermostat to fit your lifestyle.  
. Move the power switch to ON.  
1
2
3
4
. Hold MODE key until 12:00 AM shows in display.  
. Use SLOW key to set the time of your first program. Hold to go forward; tap to go back.  
. Use HEAT and COOL keys to set temperatures for your first program. For heat, hold  
HEAT key to go higher, tap to go lower. For air conditioning, hold COOL to go lower, tap to go  
higher.  
5
6
. Set all other programs by repeating steps 3 & 4. Press MODE to lock in for all 7 days.  
. Hold MODE until SET CLOCK shows in display. Use FAST, then SLOW to move to  
current time and day. (Clock only accurate to within 10 minutes. ) Tap MODE to lock in (tempera-  
ture and set point indicators will appear).  
7
. To review programs, hold FAST or SLOW key.  
TABLE OF CONTENTS  
Quick Reference to the Keys . . . . . . . . . . . . . . . . . . . . .. I  
Maintaining Your Thermostat . . . . . . . . . . . . . . . . ...28  
Replacing the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . ...28  
Recalibrating the Thermostat . . . . . . . . . . . . . . . ...29  
The “Waiting” Indicator During  
Installing the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...4  
Programming Your Thermostat . . . . . . . . . . . . . . . ...5  
Set the Program Schedule and  
Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...30  
Temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...5 Your Personal Program . . . . . . . . . . . . . . . . . . . . . . . . . . ...31  
Set the Current Day and Time . . . . . . . . . . . . . ...10  
Check Your Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Option—Adding an Extra Nighttime  
Set Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Set the Fan Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...14  
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . ...32  
index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...36  
Relay Ordering Information . . . . . . . . . . . . . . . . . . . . ...37  
Limited One-Year Warranty . . . . . . . . . . . . . . . . . . . . . . . 41  
Changing Your Program . . . . . . . . . . . . . . . . . . . . . . . . . ...15  
Making Permanent Program Changes . ...15  
Erasing the Entire Program . . . . . . . . . . . . . . . . . . ...18  
Making Temporary Program Changes . ...19  
Changing for Daylight-Saving or  
Standard Time , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...25  
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Welcome to the world of comfort and energy savings with your new Honeywell Magic  
electronic thermostat. The Magic  
electronic controls.  
name is synonymous with innovation and state-of -the-arl  
Your new thermostat will automatically control the temperature in your home, keeping you  
comfortable while saving energy when programmed according to the instructions in this manual.  
This thermostat includes the Weather  
feature. The operation of your furnace or air  
conditioner is started early enough to reach the desired temperature at the times you set. There  
is no need for you to guess when the system should turn on to reach the desired temperature.  
When the outside temperature drops or rises dramatically, the thermostat activates earlier or  
later to meet the next programmed setting,  
TABLE OF CONTENTS  
Quick Reference to the Keys . . . . . . . . . . . . . . . . . . . ...1  
Maintaining Your Thermostat . . . . . . . . . . . . . . . . ...28  
Replacing the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . ...28  
Recalibrating the Thermostat . . . . . . . . . . . . . . . ...29  
The “Waiting” Indicator During  
Installing the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...4  
Programming Your Thermostat . . . . . . . . . . . . . . . ...5  
Set the Program Schedule and  
Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...5 Your Personal Program . . . . . . . . . . . . . . . . . . . . . . . . . . ...31  
Set the Current Day and Time . . . . . . . . . . . . . ...10  
Check Your Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...12  
Option—Adding an Extra Nighttime  
Set Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Set the Fan Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...14  
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . ...32  
index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...36  
Relay Ordering information . . . . . . . . . . . . . . . . . . . . ...37  
Limited One-Year Warrant y . . . . . . . . . . . . . . . . . . . . . . . 41  
Changing Your Program . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Making Permanent Program Changes . ...15  
Erasing the Entire Program . . . . . . . . . . . . . . . . . . . . . 18  
Making Temporary Program Changes . ...19  
Changing for Daylight-Saving or  
Standard Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...25  
I
QUICK REFERENCE TO THE KEYS  
Use to program heating temperatures. To raise the temperature by 2° increments,  
press and hold the key. To lower the temperature, tap the key.  
Heat  
Use to program air conditioning temperatures. To lower the temperature by 2°  
increments, press and hold the key. To raise the temperature, tap the key.  
cool  
On  
Off  
ON allows for thermostat operation. OFF erases any program and disables the  
furnace and air conditioner.  
Power  
Auto On  
AUTO sets the fan to turn on and off with the heating or air conditioning system.  
the fan to run continuously. (Applicable only to systems with more than  
Fan  
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0-8026—2  
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Before the thermostat is programmed, holding this key sequences through  
PROGRAM and SET CLOCK. After the thermostat is programmed, holding this key  
sequences through the 4 functions; release when desired function is reached. The  
four functions include:  
PROGRAM—allows you to program the heating and cooling temperature points,  
at 2 to 6 different times per day, for each day of the week.  
SET CLOCK—allows you to enter the current time to within 10 minutes.  
HOLD—allows you to set and hold one temperature until you choose to change  
it. This feature can be used only after the thermostat has been programmed. See  
page 20.  
HOLD UNTIL—allows you to set and hold one temperature for up to a week; it  
will return to your normal schedule at a time and day you set. This feature can be  
used only after the thermostat has been programmed. See page 22.  
Tapping the Mode key interrupts function sequencing, and returns to display of  
present room temperature.  
2
When in SET CLOCK mode, hold key to advance clock time in 4 hour  
ments. To step the clock backward by 4 hour increments, tap the key.  
Fast  
When in PROGRAM mode, use to review entered programs. Hold key to  
advance to next programmed temperature range; tap to back up.  
When in SET CLOCK mode, hold key to advance clock time in 10 minute  
increments. To step the clock backward by 10 minute increments, tap the key.  
slow  
When in PROGRAM mode, hold key to advance program time in 30 minute  
increments. To step the time backward by 30 minute increments, tap the key.  
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AH3..LV83H1  
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PROGRAMMING YOUR THERMOSTAT  
You may program this thermostat either before or after installation. See installation manual  
form number 69-8025 for installation instructions.  
be sure the battery is installed (see  
If you are programming the thermostat before installation,  
page 4). During programming, if you leave the thermostat for a few minutes, it will go blank to  
hold HEAT key to relight the  
save battery power. This does not affect your program;  
STEP 1  
SET THE PROGRAM SCHEDULE AND TEMPERATURES  
Before you begin... The schedule form on page 31 provides an opportunity to plan your  
schedule. Please fill it out before you begin.  
Open right-hand door of thermostat. Switch to OFF to clear the thermostat.  
On  
Off  
Power  
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9-8026—2  
On  
Off  
Switch ON. The display shows this test position.  
60 70 80 90  
111111111111111111  
1
AM PM  
S M T W T F S  
A few seconds later, the display looks like this.  
6
0 70 80 90  
1
111111111111111111  
mmmmn  
7
0
m m m n m m  
S M T W T F S  
ROOM TEMPERATURE  
6
To begin programming, press and hold until the  
display looks like this. If you pass this display,  
60 70 80 90  
ode continue to hold key until this display comes back.  
NOTE: All seven day indicators are onto tell you that  
you are programming every day of the week the  
same. You will be able to change individual days  
later.  
PROGRAM  
AM  
To set the first time program, press and hold until  
the display shows the time you want to wake up  
o AM shown).  
60 70 80 90  
w
The time advances in 30-minute intervals. You can  
PROGRAM  
back up by tapping the key; go forward by holding the  
key.  
AM  
■ ■  
S M T W T F S  
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TEMPERATURE SET POINT INDICATORS  
To set the first temperature program, press and  
hold until the display shows the temperature you want  
when you wake up during the heating season (72°  
Heat shown) .Youcan backup bytapping thekey.  
6
0 70 80 90  
1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 II  
m w  
PROGRAM  
The LEFT temperature set point indicator should be stopped  
under the heating temperature you desire when you wake up, with ‘M  
m m m m n m  
a maximum of 80°  
S M T W T F S  
TEMPERATURE SET POINT INDICATORS  
If you have air conditioning, press and hold until  
the display shows the temperature you want when  
you wake up during cooling season (76° shown). You  
can backup by tapping the key. You must have a 6°  
or greater difference between heat and cool tempera-  
ture settings.  
6
0 70 80 90  
1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1  
m
6
AM  
m m m u m m  
S M T W T F S  
8
The RIGHT temperature set point indicator should be stopped under the cooling temperature  
you desire when you wake up, with a minimum of 62° F.  
To set additional program times and temperatures, repeat steps starting on lower  
half of page 7 through here. First set a time, then enter heating and cooling tem-  
peratures desired at that time.  
You must set at least one more time/temperature schedule, and may set up to a total of 6 per  
day. They must beat least 30 minutes apart.  
After programming is complete, hoId to lock in  
place. It is now copied into all 7 days of the. week. If  
60 70 80 90  
M o d e  
p ro g ra m s fo r d iffe re n t d a y s, s e e  
page 15.  
SET CLOCK  
AM  
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9-8026—2  
STEP 2  
SET THE CURRENT DAY AND TfME  
6
0 70 80 90  
1
111111111111111111  
Now you will set the current day and time of day.  
sET CLOCK  
Press until the display looks like this.  
Mode  
AM  
Press until you reach the correct day (Wednesday  
shown) and approximately the correct time, within 4  
hours. (Hold the key to advance the time in 4 hour  
6
0
70 80 90  
1
111111111111111111  
increments, tap the key to back up. )  
SET CLOCK  
PM  
S M T  
/
T F S  
WEDNESDAY SHOWN’  
1
0
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Press until you reach the exact time, within 10  
minutes. (Hold the key to advance the time in 10-  
o minute increments, tap the key to back up. )  
6
0
70 80 90  
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SET CLOCK  
PM  
Tap to store the time and date in the thermostat’s  
memory. The normal room temperature display  
return.  
6
0 70 80 90  
1
111111111111111111  
.m m m m  
7
0
S M T W T F S  
ROOM TEMPERATURE  
DISPLAYED  
69-8026—2  
STEP 3  
CHECK YOUR  
Press until PROGRAM shows in the display.  
6
0
70 80 90  
Mode  
n m n m m m  
S M T W T F S  
Press to review each program you have set.  
Fast  
1
2
.
-
Press until normal temperature display returns.  
6
0
70 80 90  
Mode  
1111111111111111111  
mmmmm  
7
0
S M T W T F S  
ROOM TEMPERATURE  
DISPLAYED  
STEP 4  
OPTION-ADDING AN EXTRA  
SET POINT  
If you have not used all 6 set points in any given day, consider programming a second  
nighttime set point.  
For example, if your regular bedtime is 10:30 p.m., put in a 1:00 a.m. set point that is the  
same temperature as the 10:30 p.m. set point. The entry of the second set point ensures that  
even if you stay up past your bedtime and override your program, you won’t have to remember  
to set the thermostat back when you go to bed.  
1
3
69-8026—2  
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STEP 5  
SET THE FAN SWITCH  
Auto On  
Fan  
FAN AUTO: Normal or energy saving setting for most homes. The fan goes on  
and off with the air conditioner in summer. In winter, the fan on most systems starts  
a few minutes after the furnace comes on. stops a few minutes after the furnace  
goes off. The fan starts and stops with the furnace in some electric heat systems.  
Auto On  
Fan  
FAN ON: The fan runs continuously. Use for improved air circulation during  
aI occasions or for more efficient electronic air cleaning.  
1
4
CHANGING YOUR PROGRAM  
MAKING PERMANENT PROGRAM CHANGES  
Press until display shows PROGRAM.  
Mode  
60 70 80  
111111111111111111  
1
1
5
Press to review programs; notice the day of the  
week indicator position change as you review the  
programs. When the day and time you want to  
change is displayed, release.  
6
0 70 80 90  
1
111111111111111111  
■ ■ ■  
PROGRAM  
AM  
THE DAY  
MOVES  
AS YOU REVIEW  
To erase a program, hold both buttons  
down until set point indicators disappear.  
6
0 70 80 90  
1
111111111111111111  
Heat  
cool  
PROGRAM  
AM  
1
6
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Display new time by holding (to advance) or  
tapping (to back up).  
6
0 70 80 90  
1
111111111111111111  
PROGRAM  
AM  
Hold to set heating and cooling set points  
6
0 70 80 90  
,111111111  
mmmmm  
Heat  
cool  
PROGRAM  
AM  
Verify change by holding (to advance) or tapping  
to back up).  
(
Repeat steps on pages 15-17  
want are made.  
all changes you  
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9-8026-2  
1
7
Tap to store the changes in the thermostat’s  
memory.  
Mode  
mmm. m  
70  
S M T W T F S  
TEMPERATURE  
DISPLAYED  
ERASING THE ENTIRE PROGRAM  
On  
Off  
To erase the existing program completely, turn power switch OFF...  
On  
Off  
.
ON.  
Until you reprogram (see page 5), a factory-installed program will operate the  
heating system at 68° F, the cooling system at 78° F.  
1
8
MAKING TEMPORARY PROGRAM CHANGES  
The term hold” feature lets you custom-tailor the program for those times when  
someone comes home early, or you’re staying up late, or you plan to be out for the evening.  
To temporarily raise or lower the temperature for the current period only:  
Press to change the heating or cooling  
set point (shown with heat setting holding at  
change will stay in only  
C O OI the next scheduled program change.  
60 70 80 90  
I
1
111111111111111111  
m . . . . . . .  
Heat  
70  
I
ROOM TEMPERATURE  
DISPLAYED  
1
9
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The  
term hold” feature is particularly useful when you go on vacation or other extended  
a b se nc e . It  
not cancel your program.  
Press and hold until the display shows HOLD.  
6
0
70 80 90  
Mode  
1111111111111111111  
■ ■ ■  
70  
NOLD  
S M T W T F S  
Tap or hold until temperature indicators  
show the range at which you want the  
thermostat to maintain the heating and  
cool cooling temperatures.  
6
0
70 80 90  
1
111111111111111111  
mmmmmmwm  
Heat  
7
0
HOLD  
S M T W T F S  
2
0
To cancel HOLD, press and hold until HOLD  
disappears from display. Continue to hold until you  
see the normal room temperature display.  
6
0 70 80 90  
Mode  
mmmmm  
7
0
Your regular program will resume at the next  
programmed time.  
S M T W T F S  
TEMPERATURE  
DISPLAYED  
2
1
69-8026—2  
The “HOLD UNTIL” feature holds the temperature range for up to a week, and then cancels  
it, returning control to your program so your home is at the comfort level you want when you  
ret urn.  
Press until HOLD UNTIL is displayed.  
6
0 70 80 90  
Mode  
mmm  
Use to change heating and cooling set  
points as (shown with heat setting  
‘ r ~  
7
0
NOLD UNTIL  
Heat  
cool  
S M T W T F S  
2
2
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Press and hold to step through your weekly  
program until you reach the day and time at which  
you want the thermostat to resume normal pro-  
60 70 80 90  
grammed operation (shown holding until  
Sunday).  
PM 011  
Press once,  
6
0 70 80 90  
Mode  
1111111111111111111  
7
0
NOLD UNTIL  
S M T W T F S  
2
3
69-8026—2  
To cancel HOLD UNTIL early, hold key until the  
display cycles through the various displays. Release  
Mode the key when it cycles to the normal display of room  
temperature.  
7
0
Your regular program will resume at the  
programmed time.  
S M T W T F S  
ROOM TEMPERATURE  
DISPLAYED  
2
4
CHANGING FOR DAYLIGHT-SAVING OR STANDARD TIME  
To move clock ahead an hour in spring, hold key  
until SET CLOCK shows.  
60 70 80 90  
1111111111111111111  
Mode  
SET CLOCK  
1
0 : 3 0  
PM  
S M T W T F S  
Press and hold until clock advances 1 hour.  
slow  
6
0
70 80 90  
111111111111111111  
SET CLOCK  
1
1
1 : 3 0  
PM  
2
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Tap to lock in change.  
6
0 70 80 90  
Mode  
1111111111111111111  
nmmmm  
7
0
ROOM TEMPERATURE  
DISPLAYED  
To m o ve th e c lo c k b a c k o n e h o u r  
SET CLOCK shows.  
fa ll, h o ld k e y  
6
0 70 80 90  
1111111111111111111  
SET CLOCK  
Mode  
PM  
S M T W T F S  
2
6
Tap 6 times to back up the clock one hour.  
6
0 70 80 90  
1111111111111111111  
SET CLOCK  
slow  
PM  
Tap to lock in change,  
6
0 70 80 90  
,111111111111111111  
. . . . .  
Mode  
.
70  
S M T W T F S  
TEMPERATURE  
DISPLAYED  
2
7
69-8026-2  
MAINTAINING YOUR THERMOSTAT  
REPLACING THE BATTERY  
BATTERY  
CON  
Your thermostat uses a 9 V alkaline battery as backup to hold  
the program in case of a power outage. For best results, replace  
battery every 5 years.  
To replace:  
Open right-hand thermostat door.  
Remove battery from battery holder and battery connector.  
Press battery connector onto a fresh 9 V alkaline battery. Place  
battery in the battery holder as shown.  
Close the d o o r.  
2
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RECALIBRATING THE THERMOSTAT  
TEMPERATURE ADJUSTMENT  
SCREW  
Your thermostat should normally display the correct room  
temperature.  
display,  
stat can  
as follows:  
Make sure the thermostat has been on for at least 2 hours.  
Place an accurate room thermometer near the left side of the  
thermostat. Be careful not to touch thermometer or breathe on it.  
Open the left door of the thermostat.  
l Locate the temperature adjustment screw.  
Use a flat blade screwdriver to turn the screw slightly clock-  
wise  
to increase, or counterclockwise  
indicated emperature.  
to decrease the  
After each turn, allow the thermostat to stabilize about 30 seconds.  
Continue this procedure until the thermostat has the same temperature reading as the room  
thermometer.  
2
9
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9-8026—2  
THE “WAITING” INDICATOR DURING AIR CONDITIONING  
To prevent possible damage to your compressor, and to maximize the efficiency of your air  
conditioning system, no controls can be activated for approximately 6 minutes after the com-  
pressor shuts off. If you try to override the temperature during this time, the display will show  
WAITING until the 6 minutes pass.  
30  
YOUR PERSONAL PROGRAM  
Use the table below to plan your schedule before you begin programming. If you are pro-  
gramming a different schedule for each day of the week, fill out-a different table for each day.  
b
Desired Temperature  
a
Typical Activity  
Wake up  
Leave home  
Arrive home  
After dinner  
Retire  
Extra Nighttime  
Set Point (see  
page 13)  
Your Start Time  
Heating  
Cooling  
a
You may program between 2 and 6 typical activity times.  
b
You may program up to 8 different heating/cooling temperature combinations over the duration  
of a week.  
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69-8026—2  
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TROUBLESHOOTING GUIDE  
IF...  
THEN...  
Thermostat loses program.  
Check for loose battery.  
Check that power switch is ON.  
Thermostat shows no display,  
unless HEAT or COOL key is held.  
Check that power switch is ON.  
•l Check main switches, fuse and circuit breakers  
on heating equipment to make sure the thermostat  
has power. The heating control circuit powers the  
thermostat even when it is controlling air condition-  
ing equipment.  
Check the wiring connections to the thermostat.  
Make sure your system uses 24 Vat. The  
thermostat will not operate on a millivolt system.  
Jumper & Y or RH & W. If system comes on,  
thermostat needs replacement. If system does not  
come on, a problem exists in the system (such as  
transformer, relay or valve).  
3
2
Troubleshooting Guide continued  
IF...  
THEN...  
Your furnace is interrupting power to the  
Display goes blank less than 30  
seconds before or after a furnace  
burn cycle.  
thermostat. This is not a problem, as the 9 V  
alkaline battery will be adequate to carry the  
program for the entire heating season. Do NOT  
use a rechargeable battery.  
Display goes blank for several  
minutes during a long furnace burn  
cycle.  
Check for dirty air filters or blocked registers. If  
registers are not blocked and the air filter is clean,  
an isolating relay probably needs to be installed on  
your heating system. See Table 1 in the installation  
manual, form number 69-8025.  
Temperature display is incorrect.  
•l See “Recalibrating the Thermostat,” page 29.  
3
3
69-8026—2  
Troubleshooting Guide continued  
IF...  
THEN...  
Furnace or air conditioner  
operates continuously.  
Check the thermostat to see if it is wired properly.  
Check the furnace and air conditioning systems to  
make sure they are operating correctly.  
Thermostat will not turn heat or  
air conditioner on.  
•l Check breaker on heater or air conditioner  
to make sure it has power.  
Check that pilot light/power is on; this thermostat  
steals” power from the heating circuit.  
Verify wiring.  
Thermostat will not let you make  
a temperature setting.  
Check if you have already made 6 settings. A  
maximum of 6 settings per day are available. The  
thermostat will not accept a seventh setting.  
Check if you have used all 8 available temperature  
combinations. A maximum of 8 heating and cooling  
combinations are allowed in total in your weekly  
3
4
href="
Troubleshooting Guide continued  
IF...  
THEN...  
program. The thermostat will not accept a ninth  
combination.  
Thermostat will not let you make a  
temperature setting. (continued)  
(
Use the programming chart on page 31 to make  
sure you do not use any more settings or combina-  
tions than allowed.).  
l Your program has probably been lost. The  
Thermostat is not following your  
program, but is maintaining a  
constant temperature.  
thermostat will maintain the factory-set program  
(68° heat, 78° cool) until you reenter a new  
program.  
IF ADDITIONAL ASSISTANCE IS NEEDED, CALL HONEYWELL CONSUMER AFFAIRS AT  
-800-468-1502, MONDAY-FRIDAY, a.m. p.m., CENTRAL TIME.  
1
3
5
69-8026-2  
INDEX  
Batteries, installation . . . . . . . . . . . . . . ...4  
Batteries, replacement . . . . . . . . . . ...28  
Blank display . . . . . . . . . . . . . . . . . . . . . . . . ...33  
Changing your program . . . . . . . . ...15  
Consumer Affairs Group . . . . . . . ...39  
Cool key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Daylight-Saving Time change.. 25  
Energy savings, typical.. . . . . . . . ...42  
Erasing the entire program . . . ...18  
Factory-installed program . . . . . ...18  
Fan switch . . . . . . . . . . . . . . . . . . . . . . 1  
Long term  
. . . . . . . . . . . . . . . . . . . . . . .  
Set fan switch , . . . . . . . . . . . . . . . . . . . . . . ...14  
Set heating temperatures . . . . . . . ...8  
Short term hold . . . . . . . . . . . . . . . . . . . . . ...19  
Slow key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...3  
Standard Time change . . . . . . . . . ...26  
Switch, fan . . . . . . . . . . . . . . . . . . . . . . . . 1  
Mode key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2  
Nighttime set point, extra . . . . . . ...13  
Ordering information, relay . . . ...37  
Permanent program changes.. 15  
Personal program . . . . . . . . . . . . . . . . . ...31  
Power switch . . . . . . . . . . . . . . . . . . . . . 1  
PROGRAM ., . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2  
Program changing . . . . . . . . . . . . . . . . ...15  
Quick reference to the keys . . . . . . . 1  
Recalibrating the thermostat . . . . 29  
Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...33. 37  
Table of  
. . . . . . . . . . . . . . . . . . . . . .  
Temperature adjustment  
screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...29  
Temperature set point indicator. 8  
Temporary program changes ..19  
.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...3  
Time . . . . . . . . . . .  
11  
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...” Relay ordering information . . . ...37  
Troubleshooting . . . . . . . . . . . . . . . . . . . . ...32  
“Waiting” indicator during air  
conditioning . . . . . . . . . . . . . . . . . . . . . ...30  
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...41  
Heat key . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
HOLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2. 20  
Replacing batteries ... . . . . . . . . . . . . ...28  
SET CLOCK . . . . . . . . . . . . . . . . . . . . . ...2. 11  
Set cooling temperatures . . . . . . . . ...8  
HOLD  
. . . . . . . . . . . . . . . . . . . . . ...2. 22  
Incorrect display . . . . . . . . . . . . . . . . . . . ...33  
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Set  
Set  
current  
current  
day  
time  
10  
11  
Weather  
. . . . . . . . . . . . . . . . . . . ...*  
See inside front cover.  
3
6
RELAY ORDERING INFORMATION  
Send orders to: Honeywell Inc., Consumer Affairs  
462, 1885 Douglas Dr. N., Golden Valley, MN 55422-3992.  
Shipping/  
Handling  
Total  
Price  
1
Parl No.  
MS101Q  
Price Ea.  
Quantity  
Kit  
Isolating Relay  
Transformer Kit  
$10  
$20  
$3.00  
V
Subtotal  
Your  
sales tax  
Total  
Check enclosed  
Charge my Visa card  
exp. date  
 Money order  
signature  
signature  
signature  
Charge my MasterCard  
exp. date  
Charge my  
date  
Card  
NOTE: Credit card orders may also be made by calling 1-800-468-1502  
p.m., Central rime.  
Send ta:  
Name  
Address  
City  
State  
zip  
Your daytime phone number  
3
7
69-8026—2  
href="
Toll-free Installation and Programming Assistance  
For all questions concerning this thermostat, please read and follow the instructions. If  
additional assistance is needed, call our toll-free Consumer Affairs group number at 1-800-468-  
1
502, Monday-Friday,  
a.m. -4:00 p.m., Central time.  
r
NOTICE  
This equipment is a Class B digital apparatus which complies with Canadian Radio  
Interference Regulations, CRC c.1374.  
This thermostat is manufactured under one or more of the following patents;  
,172,555; 4,314,665; 4,335,847; 4,356,962. Other Patents Pending.  
Patent No  
4
3
9
69-8026—2  
LIMITED ONE-YEAR WARRANTY  
Honeywell warrants all products fisted in this book to be free from defects in workmanship or materials, under normal use  
and service, for a period of one (1) year from the date of purchase by the consumer. If, at any time during the warranty  
period, the product is defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option) within a  
reasonable period of time.  
If the product is defective,  
(
i) return with a  
of  
receipt or other dated proof of purchase, to the retailer from whom you purchased it, or  
with a of receipt or other dated proof of purchase and a short description of  
(ii) package it  
the malfunction, and mai it, postage prepaid, to the following address:  
Honeywell Inc.  
Return Goods  
050 Berkshire Lane  
Plymouth, MN 55441-4437  
1
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 WARRANN 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  
This warranty gives you specific legal rights, and you may have other rights which vary from state to state.  
If you have any questions this warranty, please write our Consumer Affairs Department, Honeywell Inc. 18S5  
Douglas Drive North, Golden Valley, MN 55422-3992, or call 1 -S00-468-1 502, Monday-Friday, to Central time.  
may not apply to you.  
TYP ICAL ENERGY S AVINGS FOR REP RES ENTATIVE CITIES IN THE U.S .  
%Sw.g5forOnee4.Oay,  
%SavinmforTwiceA-Oay,  
%Savingsfor5T  
30%  
2s%  
26%  
24%  
.
2
2%  
.
1
1
6%  
4%  
1
2%  
1
0%  
6
%
-
-..  
..”  
City  
St  
Columbus  
C
on  
offset-( 5°F offset  
5
5
Form Number 69-8026—2  
Inc. 1990  
Rev. 7-90