Page 1
HomeServices
1-800-4-MY-HOME
Operator: Save these ins uctions re use!--
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
Your new 5-Day/I-Day/I-Day Digital Thermostat uses the tech-
nology of a solid-state microcomputer to provide precise time/
temperature control. This thermostat offers you the flexibility to
design heating and cooling programs that fit your needs.
Features:
• Separate 5-day (weekday), 1-day (Sat) and 1-day (Sun) pro-
gramming with four separate time/temperature periods per day
• Simultaneous heat and cool program storage
• Preprogrammed temperature control
• Backlit display
• LCD continuously displays setpoint, and alternately dis-
plays time and room temperature
1F80-382
Programmable Electronic Digital Thermostat
iNSTALLATION AND
OPERATION iNSTRUCTiONS
DESCRIPTION
• Temperature override until next program period
• Manual program override (HOLD temperature)
• Temporary HOLD
• °F/°C convertibility
• Temperature range 45° to 90°F
• RC, RH, C, W, Y, G, O and Bterminals
• Optional C terminal (Dual Power option)
• B and O terminals for single stage heat pumps (no auxiliary
heat) or damper operation
• Program storage in case of power loss
• 2 "AA" alkaline batteries included
This thermostat is intended for use with alow voltage system; do
not use this thermostat with a line voltage system. If in doubt
about whether your wiring is millivolt, line, or low voltage, have
it inspected by a qualified heating and air conditioning contractor
or electrician.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical codes and
ordinances.
This control is a precision instrument, and should be handled
carefully. Rough handling or distorting components could cause
the control to malfunction.
To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
ELECTRICAL DATA APPLICATIONS
Electrical Rating:
8 to 30 VAC 50/60 Hz. or D.C.
0.05 to 1.0 Amps (Load per terminal)
1.5 Amps Maximum Total Load (All terminals combined)
THERMAL DATA
Setpoint Temperature Range:
45°F to 90°F (7°C to 32°C)
Operating Ambient Temperature Range:
32°F to 105°F
Operating Humidity Range:
0 to 90% RH (non-condensing)
Shipping Temperature Range:
-4°F to 149°F
Do not use on circuits exceeding specified voltage.
Higher voltage will damage control and could cause
shock or fire hazard.
Do not short out terminals on gas valve or primary
control to test. Short or incorrect wiring will damage
thermostat and could cause personal injury and/or
property damage.
Thermostat installation and all components of the sys-
tem shall conform to Class II circuits per the NEC code.
For use with:
• Standard heat/cool or heat only systems
• Electric heat systems
• Gas or oil fired systems
• Gas systems with intermittent ignition devices (M.D.)
and/or vent dampers
• Hydronic (hot water or steam) systems
• Single-stage heat pump systems (no auxiliary heat)
• Millivolt systems
DO NOT USE WITH:
• Multi-stage systems
• Systems exceeding 30 VAC and 1.5 amps
• 3-wire zoned hydronic heating systems
PRECAUTIONS
SPECIFICATIONS
PART NO. 37=6924A
0811
Page 2
INSTALLATION
REMOVE OLD THERMOSTAT
1. Shut off electricity at the main fuse box until installation is
complete. Ensure that electrical power is disconnected.
2. Remove the front cover of the old thermostat. With wires
still attached, remove wall plate from the wall. If the old
thermostat has a wall mounting plate, remove the thermo-
stat and the wall mounting plate as an assembly.
3. Identify each wire attached to the old thermostat using
the labels enclosed with the new thermostat.
4. Disconnect the wires from old thermostat one at a time. DO
NOT LET WIRES FALL BACK INTO THE WALL.
5. Install new thermostat using the following procedures.
ATTENTION!
This product does not contain mercury. However, this product
may replace a unit which contains mercury.
Do not open mercury cells. If a cell becomes damaged, do not
touch any spilled mercury. Wearing nonabsorbent gloves, take
up the spilled mercury with sand or other absorbent material and
place into a container which can be sealed. If a cell becomes
damaged, the unit should be discarded.
Mercury must not be discarded in household trash. When the
unit this product is replacing is to be discarded, place in a
suitable container and return toWhite-Rodgers at 2895 Harrison
Street, Batesville, AR 72501 for proper disposal.
ELECTRIC HEAT OR SINGLE-STAGE
HEAT PUMP SYSTEMS
This thermostat is configured from the factory to operate a heat/
cool, fossil fuel (gas, oil, etc.), forced air system. It is configured
correctly for any system that DOES NOT require the thermostat
to energize the fan on a call for heat. Ifyour system is an electric
heat or heat-pump system that REQUIRES the thermostat to
turn on the fan on a call for heat, locate the ELECTRIC/GAS
switch on the back of the thermostat (see fig. 1) and switch itto
the ELECTRIC position. This will allow the thermostat to
energize the fan immediately on a call for heat. Ifyou are unsure
if the heating/cooling system requires the thermostat to control
the fan, contact a qualified heating and air conditioning service
person.
ATTACH THERMOSTAT BASE TO WALL
1. Remove the packing material from the thermostat. Gently
pull the cover straight off the base. Forcing or prying on the
thermostat will cause damage to the unit. If necessary, move
the electric heat switch (see ELECTRIC HEAT SYSTEMS,
above).
2. Connect wires beneath terminal screws on base using
appropriate wiring schematic (see figs. 2 through 7).
3. Place base over hole in wall and mark mounting hole
locations on wall using base as a template.
4. Move base out of the way. Drill mounting holes.
5. Fasten base loosely to wall, as shown in fig. 1, using two
mounting screws. Place a level against bottom of base,
adjust until level, and then tighten screws. (Leveling is for
appearance only and will not affect thermostat operation.) If
you are using existing mounting holes, or if holes drilled are
too large and do not allow you to tighten base snugly, use
plastic screw anchors to secure subbase.
Screw anchors
Mounting
holes
Electric/Gas
switch
Mounting
holes
Figure 1. Thermostat Base
6. Push excess wire into wall and plug hole with afire-resistant
material (such as fiberglass insulation) to prevent drafts
from affecting thermostat operation.
BATTERY LOCATION
2 "AA" alkaline batteries are included in the thermostat at the
factory with a battery tag to prevent power drainage. You must
remove the battery tag to engage the batteries.
If "BATT" is displayed, the batteries are low and should be
replaced. For best results, replace all batteries with new pre-
mium brand alkaline batteries such as Duracell ®or Energizer _e.
To replace batteries, install the batteries along the top of the
base (see Fig. 1). The batteries must be installed with the
positive (+) end to the left.
HYDRONIC (HOT WATER OR STEAM)
HEATING SYSTEMS
This thermostat is set to operate properly with a forced-air
heating system. If you have a hydronic heating system (a
system that heats with hot water or steam), you must set the
thermostat to operate properly with your system. Change the
second option in the configuration menu to SL (see CONFIGU-
RATION MENU, page 4).
CHECK THERMOSTAT OPERATION
If at any time during testing your system does not operate
properly, contact a qualified service person.
Turn on power to the system.
Fan Operation
If your system does not have a G terminal connection, skip to
Heating System.
1. Move FAN switch to ON position. The blower should begin
to operate.
2. Move FAN switch to AUTO position. The blower should
stop immediately.
Page 3
JUMPER
WIRE
_)24_SYSTE:°t
l _ Neutral
a TRANSFORMER
attacln to RH and W J TRANSFORMER
Figure 2.Typical wiring diagram for
heat only, 3-wire, single transformer systems
JUMPER
WiRE
TRANSFORMER
Figure 3. Typical wiring diagram for
cool only, 3-wire, single transformer systems
RED jumper wire (provided with thermostat) must be
_connected between thermostat RR and RC terminals_ JUMPER
_for proper thermostat operation with this system. _ WIRE
T o
TRANSFORMER
Figure 4.Typical wiring diagram for
heat/cool, 4=wire, single transformer systems
v
Figure &Typical wiring diagram for
heat/cool, 5-wire, two-transformer systems
JUMPER JUMPER
WIRE WIRE
I _1 Contactor|U L____
_ ! ! L 24VAC U _C
* Reversing valve is energized when tlne _=J_Neutral
system switch is in the COOL position TRANSFORMER
Figure 6. Typical wiring diagram for heat pump
with reversing valve energized in COOL
JUMPER JUMPER
WIRE WIRE
24vAcLI 14.120wc
'==L_ Neutral
COOLING TRANSFORMER
T
)mpressorll t-an I I
;°ntact°r ! Re[_
* Reversing valve is energized when the
system switch is in the HEAT position
Figure 7.Typical wiring diagram for heat pump
with reversing valve energized in HEAT
1 24wc
TRANSFORMER
* The 24 Volt neutral connection to terminal C on the thermostat is not required ifthe batteries are replaced once a year
with fresh premium brand alkaline batteries.
Heating System
1. Move SYSTEM switch to HEAT position. If the heating
system has a standing pilot, be sure to light it.
2. Press (_ to adjust thermostat setting above room tempera-
ture. The heating system should begin to operate.
3. Press (_ to adjust temperature setting below room tem-
perature. The heating system should stop operating.
Cooling System
To prevent compressor and/or property damage, if the
outdoor temperature is below 50°F, DO NOT operate
the cooling system.
1. Move SYSTEM switch to COOL position.
2. Press (_) to adjust thermostat setting below room tempera-
ture. The blower should come on immediately on high
speed, followed by cold air circulation
3. Press (_ to adjust temperature setting above room tem-
perature. The cooling system should stop operating.
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OPERATION
Before you begin programming your thermostat, you should be
familiar with its features and with the display and the location
and operation of the thermostat buttons. Your thermostat con-
sists of two parts: the thermostat cover and the base. To
remove the cover, pull it straight out from the base. To replace
the cover, line up the cover with the base and press until the
cover snaps onto the base.
The Thermostat Buttons and Switches
Q Raises temperature setting.
Q Lowers temperature setting.
Q TIME button.
Q PRGM (program) button.
Q RUN (run program) button.
Q HOLD temperature button.
Q FAN switch (ON, AUTO).
Q SYSTEM switch (COOL, OFF, HEAT).
The Display
Q Indicates day of the week.
Q Flame icon (_) is displayed when the SYSTEM switch is in
the HEAT position. Snowflake icon (_)is displayed (non-
flashing) when the SYSTEM switch isin the COOL position.
Snowflake is displayed (flashing) if the thermostat is in
lockout mode to prevent the compressor from cycling too
quickly.
run
are
pro-
Q Displays "BATT" when the 2 "AA" batteries low and
should be replaced. Only "BATT" and "LO" in the minutes
field are displayed when batteries are low with no system
power.
Q Alternately displays current time and temperature. Dis-
plays "LO" in the minutes field when batteries are low.
Q The word "HOLD" is when the thermostat is in
the HOLD mode. "HOLD" is displayed flashing when the
thermostat is in a temporary HOLD Mode.
Q Displays currently programmed temperature (this
blank when SYSTEM switch is in the OFF position).
Q Displays "FLTR" when the has for the
grammed filter time period as a reminder to change or clean
your air filter.
displayed
set is
system
CONFIGURATION MENU
The configuration menu allows you to set certain thermostat
operating characteristics to your system or personal require-
ments.
Press RUN to make sure the thermostat is in the run program
mode, then press PRGM and RUN atthe same time to enter the
configuration menu. The display will show the first item in the
configuration menu.
The configuration menu table summarizes the configuration
options. An explanation of each option follows.
Figure 8. Thermostat display, buttons, and switches
Press HOLD to change to the next menu item or press TIME to
go backwards to the previous item in the menu. To exit the menu
and return to the program operation, press RUN. If no keys are
pressed within fifteen minutes, the thermostat will revert to
normal operation.
1) Select Temporary Hold Time - The thermostat can hold
any temperature you set it to for the amount of time you
select on this option. Your choices are 0:00 to 8:00 hours in
15 minute increments. 0:00 disables the function
Example:
1. You have selected 3:00 hours for the Temporary Hold
time period.
2. With the thermostat set to Heat or Cool, press HOLD for
approximately five seconds until HOLD time (3:00
indicating 3 hours) appears as a setting reminder.
3. After releasing the button, "HOLD" on the display will
blink.
4. Use (_ or (_ to set the temperature to your prefer-
ence. The thermostat will maintain this temperature
setting for 3 hours with "HOLD" blinking to remind you it
is in Temporary Hold. After 3 hours the thermostat will go
back to the program temperature and "HOLD" will no
longer blink or display.
2) Select FA or SL (Fast or Slow) Heating Cycle Rate - The
FAsetting is frequently used for gas, oil or electric heat. The
SL setting produces a longer heating cycle which is nor-
mally for hot water or steam (hydronic) systems. Both
settings produce very accurate temperature control and
can be set to your personal preference. FA cycles the
system just under I°F and the SL setting cycles at approxi-
mately 1.5°F.
3) Select backlit display- The display backlight improves
display contrast in low lighting conditions. Selecting back-
light ON will keep the light on for a short period of time after
any key is pressed. Selecting OFF will keep the light off.
Page 5
ConfigurationMenu
Step PressButton(s) Displayed(FactoryDefault) Press (_ or (_ to select: COMMENTS
1 PRGM HOLD 0to 8hrs(in SelecttemporaryHoldtime
2 HOLD_' 4) SL Select FAor SL (Fastor Slow) heating cycle rate
3 HOLD_' d-L OFF SelectdisplaybacklightOFForON
4 HOLD_ E OFF SelectEnergyManagementRecoveryOFFor ON
5 HOLD_ Filter 0to 1950hours Selectfilterreplacementruntime
6 HOLD_, LOC ON SelectcompressorlockoutOFForON
7 HOLDs' 0 HI 4 LO to Selecttemperaturedisplayadjustmenthigheror lower
8 HOLD_ (F) C Selecttemperaturedisplayto For C
9 RUN Returnstonormaloperation
* Press HOLD to advance to next item or TIME to movebackwards to previous item
and RUN (0:00) 15minuteincrements)
(FA)
(ON)
(ON)
(000) (in50 hour increments)
(OFF)
(0) 4 HI
4) Select Energy Management Recovery OFF or ON -
Energy Management Recovery (EMR) causes the thermo-
stat to start heating or cooling early to make the building
temperature reach the program setpoint at the time you
specify. Heating will start 5 minutes early for every 1° of
temperature required to reach setpoint.
Example: You select EMR and have your heating pro-
grammed to 65° at night and 70° at 7 AM. If the building
temperature is 65° the difference between 65° and 70° is
5°. Allowing 5 minutes per degree the thermostat setpoint
will change to 70° at 6:35 AM. Cooling allows more time per
degree because it takes longer to reach temperature.
5) Select filter replacement run time - The thermostat will
display "FLTR" after a set time of operation. This is a
reminder to change or clean your air filter. This time can be
set from 0 to 1950 hours in 50 hour increments. A selection
of 000 will cancel this feature. When "FLTR" is displayed,
you can clear it by pressing HOLD and RUN at the same
time. This resets the timer and starts counting the hours
until the next filter change. Changing the time in the menu
also resets the timer.
6) Select Compressor Lockout LOC OFF or ON - Selecting
LOC ON will cause the thermostat to wait 5 minutes before
turning on the compressor if the heating and cooling sys-
tem loses power. It will also wait 5 minutes minimum
between cooling cycles. This is intended to help protect the
compressor from short cycling. Some newer compressors
already have a time delay built in and do not require this
feature. Your compressor manufacturer can tell you if the
feature is already present in their system. When the com-
pressor time delay occurs it will flash the (snowflake icon)
for about five minutes then turn on the compressor.
7) Select Temperature Display Adjustment 4 LO to 4 HI -
Allows you to adjust the room temperature display 4° higher
or lower. Your thermostat was accurately calibrated at the
factory but you have the option to change the display
temperature to match your previous thermostat.
8) Select F° or C° Readout- Changes the display readout to
Centigrade or Fahrenheit as required.
OPERATING FEATURES
Now that you are familiar with the thermostat buttons and
display, read the following information to learn about the many
features of the thermostat.
• SIMULTANEOUS HEATING/COOLING PROGRAM
STORAGE -- When programming, you can enter both
your heating and cooling programs at the same time. There
is no need to reprogram the thermostat at the beginning of
each season.
• TEMPERATURE OVERRIDE -- Press (_) or (_) until
the display shows the temperature you want. The thermo-
stat will override current programming and keep the room
temperature at the selected temperature until the next
program period begins. Then the thermostat will automati-
cally revert to the program.
• HOLD TEMPERATURE-- The thermostat can hold any
temperature within its range for an indefinite period without
reverting to the programmed temperature. Momentarily
press HOLD button. "HOLD"will be displayed. Then choose
the desired temperature by pressing (_ or (_). The
thermostat will hold the room temperature at the selected
setting until you press RUN button to start program opera-
tion again.
• CONFIGURATION MENU -- Allows you to customize
certain thermostat options.
PROGRAMMING YOUR THERMOSTAT
This section will help you plan your thermostat's program to
meet your needs. For maximum comfort and efficiency, keep
the following guidelines in mind when planning your program.
• When heating (cooling) your building, program the
temperatures to be cooler (warmer) when the building is
vacant or during periods of low activity.
• During early morning hours, the need for cooling is
usually minimal.
Page 6
Planning Your Program
Look at the factory preprogrammed times and temperatures
shown in the sample schedule. If this program will suit your
needs, simply press the RUN button to begin running the factory
preset program.
If you want to change the preprogrammed times and tempera-
tures, follow these steps.
Determine the time periods and temperatures for your weekday
and weekend programs. You must program four periods for
both the weekday and weekend program. However, you may
use the same heating and cooling temperatures for consecutive
time periods. You can choose start times, heating tempera-
tures, and cooling temperatures independently for both week-
day and weekend programs (for example, you may select 5:00
AM and 70° as the weekday 1st period heating start time and
temperature, and also choose 7:00 AM and 76° as the weekday
1st period cooling start time and temperature).
Use the following table to plan your program time periods and
the temperatures you want during each period. Fill in the
complete table to have a record of your programs.
Entering Your Program
Follow these steps to enter the heating and cooling programs
you have selected.
Set Current Time and Day
1. PressTIME button once. The displaywill showthe houronly.
EXAMPLE: ;2: PM i
2. Press and hold either(_ or(_ until you reach the correct
hour and AM/PM designation (AM begins at midnight; PM
begins at noon).
3. Press TIME once. The displaywindowwill showthe minutes
only.
EXAMPLE: "U
4. Press and hold either(_ or(_ until you reach the correct
minutes.
5. PressTIME once. The display will showthe dayofthe week.
6. Press (_ or(_ until you reach the current day of the week.
7. Press RUN once. The display will show the correct time and
room temperature alternately.
Enter Heating Program
1. Move the SYSTEM switch to HEAT.
2. Press PRGM once. "MO TU WE TH FR" (indicating week-
day program) will appear in the display. Also displayed are
the currently programmed start time for the 1st heating
period and the currently programmed temperature (flash-
ing).
EXAMPLE: [M_---TU-wI_R'AM_jl_,
This display window shows that for the 1st weekday period,
the start time is 6:00 AM, and 68° is the programmed
temperature (this example reflects factory preprogramming).
3. Press (_) or (_ to change the displayed temperature to
your selected temperature for the 1st heating program
period.
4. Press TIME once (the programmed time will flash). Press
(_ or (_ until your selected time appears. The time will
change in 15 minute increments. When your selected time
is displayed, press TIME again to return to the change
temperature mode.
5. Press PRGM once. The currently programmed start time
and setpoint temperature for the 2nd heating program
period will appear.
6. Repeat steps 3 and 4 to select the start time and heating
temperature for the 2nd heating program period.
7. Repeat steps 3 through 5 for the 3rd and 4th heating
program periods. Weekday heating programs are now com-
plete.
8. Press PRGM once. "SA" (indicating Saturday program) will
appear in the display, along with the start time for the 1st
heating period and the currently programmed temperature.
9. Repeat steps 3 through 7 to complete Saturday heating
programming.
10.Press PRGM once. "SU" (indicating Sunday program) will
appear in the display, along with the start time for the 1st
heating period and the currently programmed temperature.
11.Repeat steps 3 through 7 to complete Sunday heating
programming.
12.When you have completed entering your heating program,
press RUN.
I__r"l__lI__l
Heating/Cooling Schedule Plan (Factory Program)
WEEKDAY (5 DAY) SATURDAY (1 DAY) SUNDAY (1 DAY}
Period Time Temperature Time Temperature Time Temperature
! 3RD 5:00 PM 70°F 5:00 PM 70°F 5:00 PM 70°F
O
O 3RD 5:00 PM 78°F 5:00 PM 78°F 5:00 PM 78°F
Start Start Start
1ST 6:00 AM 70°F 6:00 AM 70°F 6:00 AM 70°F
2ND 8:00 AM 62°F 8:00 AM 62°F 8:00 AM 62°F
4TH 10:00 PM 62°F 10:00 PM 62°F 10:00 PM 62°F
1ST 6:00 AM 78°F 6:00 AM 78°F 6:00 AM 78°F
2ND 8:00 AM 85°F 8:00 AM 85°F 8:00 AM 85°F
4TH 10:00 PM 82°F 10:00 PM 82°F 10:00 PM 82°F
SAMPLE
Heating/Cooling Schedule Plan
WEEKDAY (5 DAY) SATURDAY (1 DAY) SUNDAY (1 DAY)
Period Time Temperature Time Temperature Time Temperature
_ 2ND
IJA
! 3RD
_ 2ND
O
O 3RD
Start Start Start
1ST
4TH
1ST
4TH
Page 7
Enter Cooling Program
If the outside temperature is below 50°F, disconnect
power to the cooling system before programming.
Energizing the air conditioner compressor during cold
weather may cause personal injury or property dam-
age.
Move SYSTEM switch to COOL position.
2. Follow the procedure for entering your cooling program,
using your selected cooling times and temperatures.
CHECK YOUR PROGRAMMING
Follow these steps to check your thermostat programming one
final time before beginning thermostat operation.
1. Move SYSTEM switch to HEAT position.
2. Press PRGM to view the 1st weekday heating period time
and temperature. Each time you press PRGM, the next
heating period time and temperature will be displayed in
sequence for weekday, then weekend program periods (you
may change anytime or temperature during this procedure).
3. Press RUN.
4. Move SYSTEM switch to COOL position.
5. Repeat step 2 to check cooling program.
6. Move SYSTEM switch to HEATorCOOLand press RUN to
begin program operation.
YOUR THERMOSTAT IS NOW COMPLETELY PROGRAMMED
AND READY TO PROVIDE MAXmMUM COMFORT AND EFFm-
ClENCY!
TROUBLESHOOTING
Reset Operation
If a voltage spike or static discharge blanks out the display or
causes erratic thermostat operation you can reset the thermo-
stat by pressing (_, (_ and TIME at the same time. This also
resets the factory defaults to the configuration menu and
Symptom
No Heat/No Cool/No Fan
(common problems)
No Heat
No Cool
Possible Cause
1. Blown fuse or tripped circuit breaker
2. Furnace power switch to OFE
3. Furnace blower compartment door or
panel loose or not properly installed.
1. Pilot light not lit.
2. SYSTEM Switch not set to H EAT.
3. Loose connection to thermostat or system.
4. Furnace Lock-Out Condition. Heat may also
be intermittent.
5. Heating System requires service or thermostat
thermostat requires replacement.
1. SYSTEM Switch not set to COOL
2. Loose connection to thermostat or system.
3. Cooling System requires service or thermostat
requires replacement.
program. If the thermostat has power, has been reset and still
does not function correctly contact your heating/cooling ser-
vice person or place of purchase.
Batteries
For optimum performance, we recommend replacing batteries
once a year with fresh "AA" alkaline batteries.
Corrective Action
Replace fuse or reset breaker.
Turn switch to ON.
Replace door panel in proper position to engage
safety interlock or door switch.
Re-light pilot.
Set SYSTEM Switch to Heat and raise setpoint
above room temperature.
Verify thermostat and system wires are securely
attached.
Many furnaces have safety devices that shut the
system down when a lock-out condition occurs.
If the heat works intermittently contact the furnace
manufacturer or local service person for assistance.
Diagonistic: Set SYSTEM Switch to HEAT and
raise the setpoint above room temperature. Within
a few seconds the thermostat should make a soft
click sound. This sound usually indicates the
thermostat is operating properly. If the thermostat
does not click, try the reset operation listed above.
If the thermostat does not click after being reset
contact your heating and cooling service person or
place of purchase for a replacement. If the
thermostat clicks, contact the furnace manufacturer
or a service person to verify the heating system is
operating correctly
Set SYSTEM Switch to COOL and lower setpoint
below room temperature.
Verify thermostat and system wires are securely
attached.
Same procedure as diagnostic for No Heat
condition except set the thermostat to COOL and
lower the setpoint below the room temperature.
There may be up to a five minute delay before
the thermostat clicks in Cooling if the compressor
lock-out option is selected in the configuration
menu (Item 6).
Page 8
TROUBLESHOOTING
Symptom
Heat, Cool or Fan Runs Constantly.
Furnace Cycles Too Fast or Too Slow
(narrow or wide temperature swing)
Cooling Cycles Too Fast or Too Slow
(narrow or wide temperature swing)
Thermostat Setting and Thermometer
Disagree
Clock Loses or Gains Time
Heat or Cool Starts Early
ThermostatDoes Not Follow Program
Blank Display and/or Keypad Not
Responding
Possible Cause
1. FAN Switch set to Fan ON.
2. Possible short in wiring.
3. Possible short in thermostat.
4. Possible short in Heat/Cool/Fan system.
1. The location of the thermostat and/or the size
of the Heating System may be influencing the
cycle rate.
1.The location ofthe thermostatand/orthesize
of the CoolingSystemmay be influencingthe
cycle rate.
1.Thermostatthermometersettingrequires
adjustment.
1. Loss of power to thermostat and low batteries.
1. EMRactivated
1.AMor PMset incorrectlyinprogram.
2. AM or PM set incorrectlyonthe clock.
3.Voltage spikeor static discharge.
1. Loss of power and dead batteries.
2. Voltage Spike or Static Discharge.
Corrective Action
Check each wire connection to verify they are
not shorted or touching together. No bare wire
should stick out from under terminal screws.
Try resetting the thermostat. If the condition
_ersists the manufacturer of your system
or service person can instruct you on how
to test the Heat/Cool system for correct
operation. If the system operates correctly,
replace the thermostat.
Item 2 in the Configuration Menu is the adjustment
that controls the cycle rate. If an acceptable cycle
rate is not achieved using the FA (Fast) or SL
(Slow) adjustment contact a local service person
for additional suggestions.
The cycle rate for cooling is fixed and can not be
adjusted. Contact a local service person for
suggestions.
The thermometer can be adjusted +/- 4 degrees as
listed in item 7 of the Configuration Menu. No other
adjustment is possible.
The thermostat will maintain its program in memory
even with no power/no batteries but the clock time
will be incorrect when power is restored. See No
Heat/No Cool/No Fan (common problems) above
for items to check in the system.
See Configuration Menu (Item 4).
Check current clock and program settings including
the AM or PM designations for each time period.
If a voltage spike or static discharge occurs use the
Reset Operation listed above.
Replace batteries and check heat/cool system for
proper operation. If a voltage spike or static discharge
occurs use the Reset Operation listed above.
PROGRAMMING HELP LINE: 1-800-284=2925
White-Rodgers is a division
of Emerson Electric Co.
The Emerson logo is a
trademark and service mark
of Emerson Electric Co.
White
Rodgers,o
St. Louis, Missouri Markham, Ontario
www.white-rod gers.com
EMERSON
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