White Rodgers 1f78h User Manual

CONTENTS  
Installation Instructions for  
Preparations.................................................. 1  
Thermostat Details ........................................ 1  
Removing Old Thermostat ............................ 1  
Mounting and Wiring ..................................... 2  
Check Thermostat Operation ........................ 3  
Configuration Menu ....................................... 4  
Programming your Thermostat ..................... 5  
Specifications ................................................ 7  
Troubleshooting ............................................ 8  
Heating & Air Conditioning  
1F78H  
5/2 Day Programmable Thermostat  
YOUR THERMOSTAT REPLACES  
PREPARATIONS  
1
Typical System Compatibility Chart  
1F78H  
Standard Heat Only Gas or Oil Fired Systems (24 volt)*  
Electronic Ignition Heat Only Two Wire Systems (24 volt)*  
Electronic Ignition Heat Only Gas or Oil Fired Systems (24 volt)*  
Standard Heat/Cool Systems (24 volt)*  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
No  
Assemble tools required as shown below.  
Heat/Cool Systems Electric Heat (24 volt)*  
Heat Only Electric Heat Systems (24 volt)*  
Cool Only Systems (24 volt)*  
FLAT BLADE SCREWDRIVER  
WIRE CUTTER/STRIPPER  
HAND OR POWER  
DRILL WITH 3/16 INCH  
DRILL BIT, IF NEEDED  
Heat Pump Systems (No Aux or Emergency Heat)*  
Hot Water Zone Heat Only Systems  
SPIRIT LEVEL OR PLUMB BOB AND LINE OPTIONAL—  
THERMOSTAT DOES NOT NEED TO BE LEVEL TO WORK PROPERLY  
Hot Water Zone Heat Only (Three Wire) Systems  
Line Voltage Heating or Baseboard 110/240 Volt Systems  
Millivolt Systems Floor or Wall Furnaces  
12 VDC Mobile Home Application  
No  
No  
No  
No  
Failure to follow and read all instructions carefully  
before installing or operating this control could cause  
personal injury and/or property damage  
Multistage Systems  
No  
Systems Exceeding 30VAC, 1.5 Amp  
No  
* Requires common wire for 24VAC at the thermostat  
THERMOSTAT DETAILS  
3
REMOVING OLD THERMOSTAT  
2
Mounting  
hole  
CAUTION  
!
To prevent electrical shock and/or equipment damage,  
disconnect electrical power to the system at the main  
fuse or circuit breaker until installation is complete.  
Before removing wires from old thermostat’s switching subbase,  
label each wirewith the terminal designation it was removed from.  
W
C
RH  
B
RC  
1. Remove Old Thermostat: A standard heat/cool thermostat  
consists of three basic parts:  
a. The cover, which may be either a snap-on or hinge type.  
b. The base, which is removed by loosening all captive screws.  
G
O
Y
Mounting  
hole  
W904  
W905  
W905  
Clip for  
Hydronic  
System  
c. The switching subbase, which is removed by unscrewing  
themountingscrewsthatholditonthewalloradaptorplate.  
ELEC GAS  
2. Shut off electricity at the main fuse box until installation is  
complete. Ensure that electrical power is disconnected.  
3. Remove the front cover of the old thermostat. With wires still  
attached, removewallplatefromthewall.Iftheoldthermostat  
has a wall mounting plate, remove the thermostat and the wall  
mounting plate as an assembly.  
W904  
Clip for  
Celsius Display  
Electric/Gas  
Switch  
Figure 1. Thermostat base  
4. Identify each wire attached to the old thermostat.  
5. Disconnect the wires from the old thermostat one at a time.  
DO NOT LET WIRES FALL BACK INTO THE WALL.  
6. Install new thermostat using the following procedures.  
WHITE-RODGERS  
EMERSON ELECTRIC CO.  
9797 REAVIS ROAD  
ST. LOUIS, MISSOURI 63123-5398  
PART NO. 37-6448A  
Printed in U.S.A.  
0247  
MOUNTING AND WIRING  
CONTINUED FROM SECOND PAGE  
4
THERMOSTAT  
SYSTEM  
Hot  
JUMPER  
WIRE  
Y
C
B
O
G
W
RC  
RH  
THERMOSTAT  
SYSTEM  
Y
C
B
O
G
W
RC  
RH  
Cooling  
System Relay System  
Fan  
Heating  
24 VAC  
120 VAC  
Neutral  
NOTE  
Fan  
Relay  
Heating  
System  
For Heat only,  
attach to RH and W  
HEATING  
TRANSFORMER  
Hot  
24 VAC  
120 VAC  
Neutral  
Hot  
TRANSFORMER  
24 VAC  
120 VAC  
Neutral  
Figure 2. Typical wiring diagram for  
heat only, 4-wire, single transformer systems  
COOLING TRANSFORMER  
Figure 5. Typical wiring diagram for  
heat/cool, 6-wire, two-transformer systems  
JUMPER  
WIRE  
THERMOSTAT  
Y
C
B
O
G
W
RC  
RH  
SYSTEM  
JUMPER  
WIRE  
JUMPER  
WIRE  
THERMOSTAT  
SYSTEM  
Cooling  
System Relay  
Fan  
Y
C
B
O
G
W
RC RH  
Hot  
24 VAC  
120 VAC  
Neutral  
Reversing Compressor Fan  
Valve*  
Contactor Relay  
Hot  
TRANSFORMER  
24 VAC  
120 VAC  
Neutral  
Figure 3. Typical wiring diagram for  
cool only, 4-wire, single transformer systems  
* Reversing valve is energized when the  
system switch is in the COOL position  
TRANSFORMER  
Figure 6. Typical wiring diagram for heat pump  
with reversing valve energized in COOL  
NOTE  
RED jumper wire (provided with thermostat) must be  
connected between thermostat RH and RC terminals  
for proper thermostat operation with this system.  
JUMPER  
WIRE  
JUMPER  
WIRE  
JUMPER  
WIRE  
THERMOSTAT  
SYSTEM  
THERMOSTAT  
SYSTEM  
Y
C
B
O
G
W
RC RH  
Y
C
B
O
G
W
RC RH  
Cooling  
System Relay  
Fan  
Heating  
System  
Reversing Compressor Fan  
Valve*  
Contactor Relay  
Hot  
Hot  
24 VAC  
120 VAC  
Neutral  
24 VAC  
120 VAC  
Neutral  
* Reversing valve is energized when the  
system switch is in the HEAT position  
TRANSFORMER  
TRANSFORMER  
Figure 7. Typical wiring diagram for heat pump  
with reversing valve energized in HEAT  
Figure 4. Typical wiring diagram for  
heat/cool, 5-wire, single transformer systems  
CHECK THERMOSTAT OPERATION  
5
This thermostat has a time delay between cooling cycles to allow  
the head pressure in the compressor to stabilize. If the tempera-  
ture is adjusted to call for cool within 5 minutes of the last cycle the  
snowflake icon will blink indicating the thermostat is locked out.  
After 3 to 5 minutes, the compressor will start and the snowflake  
icon will stop flashing. This helps prevent the compressor from  
cycling too quickly and is normal operation for the thermostat.  
NOTE  
To prevent static discharge problems, touch side of ther-  
mostattoreleasestaticbuild-upbeforetouchinganykeys.  
If at any time during testing your system does not operate  
properly, contact a qualified serviceperson.  
Fan Operation  
If your system does not have a G terminal connection, skip to  
1. Move SYSTEM switch to COOL position.  
2. Press  
to adjust thermostat setting below room tempera-  
Heating System.  
ture. The blower should come on immediately on high speed,  
followed by cold air circulation  
1. Turn on power to the system.  
2. Move fan switch to ON position. The blower should begin to  
3. Press  
to adjust temperature setting above room tem-  
operate.  
perature. The cooling system should stop operating.  
3. Move fan switch to AUTO position. The blower should stop  
Heating System  
immediately.  
1. Move SYSTEM switch to HEAT position. If the heating system  
Cooling 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.  
CAUTION  
!
3. Press  
to adjust temperature setting below room tem-  
To prevent compressor and/or property damage, if the  
outdoortemperatureisbelow50°F, DONOToperatethe  
cooling system.  
perature. The heating system should stop operating.  
CHECK THERMOSTAT OPERATION  
CONTINUED FROM THIRD PAGE  
5
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 consists of  
two parts: the thermostat cover and the base. To remove the  
cover, gently pull it straight out from the base. To replace the  
cover, line up the cover with the base and press gently until the  
cover snaps onto the base.  
1
2
WHITE-RODGERS  
The Thermostat Buttons and Switches  
TIME PRGM RUN HOLD  
FAN  
SYSTEM  
1
2
3
4
5
6
7
8
(Up arrow) Raises temperature setting.  
(Down arrow) Lowers temperature setting.  
ON AUTO COOL OFF HEAT  
TIME button.  
3
4
5
6
7
8
PRGM (program) button.  
9
RUN (program) button.  
HOLD button.  
FAN switch (ON, AUTO).  
SYSTEM switch (COOL, OFF, HEAT).  
12  
11  
THE DISPLAY  
Indicates day of the week.  
9
13  
10  
is displayed when the SYSTEM switch is in the HEAT  
10  
position.  
is displayed (non-flashing) when the SYSTEM  
is displayed (flashing)  
Figure 8. Thermostat display, buttons, and switches  
switch is in the COOL position.  
when the compressor is in lockout mode.  
Alternately displays current time and temperature.  
11  
12 Displayscurrentlyprogrammedsettemperature(thisisblank  
button. HOLD will be displayed. Then choose the desired  
hold temperature by pressing or . The thermostat  
when SYSTEM switch is in the OFF position).  
will hold the room temperature at the selected setting until  
you press RUN button to start program operation again.  
13  
The word HOLD is displayed when the thermostat is in the  
HOLD mode.  
OPERATING FEATURES  
CONFIGURATION MENU  
6
Now that you are familiar with the thermostat buttons and display,  
read the following information to learn about the many features of  
the thermostat.  
The configuration menu allows you to set certain thermostat  
operating characteristics to your system or personal require-  
ments.  
SIMULTANEOUSHEATING/COOLINGPROGRAMSTOR-  
AGE—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.  
Press RUN to make sure the thermostat is in the run program  
mode, then press PRGM and RUN at the same time to enter the  
configuration menu. The display will show the first item in the  
configuration menu.  
TEMPERATURE OVERRIDE—Press  
or  
until the  
display shows the temperature you want. The thermostat will  
override current programming and keep the room tempera-  
tureattheselectedtemperatureuntilthenextprogramperiod  
begins. Then the thermostat will automatically revert to the  
program.  
The configuration menu table summarizes the configuration op-  
tions. An explanation of each option follows.  
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  
pressedwithinfifteenminutes, thethermostatwillreverttonormal  
operation.  
HOLDTEMPERATURE—Thethermostatcanholdanytem-  
perature within its range for an indefinate period, without  
reverting to the programmed temperature. Press HOLD  
Configuration Menu  
Step  
Displayed (Factory Default)  
Comments  
Press Button(s)  
PRGM and RUN  
HOLD*  
Press  
or  
SL  
to select:  
1
2
3
4
5
6
7
(FA)  
d-L (ON)  
E (ON)  
LOC (OFF)  
0 HI (0)  
(F)  
Select FA or SL (Fast or Slow) heating cycle rate  
N/A  
OFF  
OFF  
ON  
Select Energy Management Recovery OFF or ON  
Select compressor lockout OFF or ON  
Select temperature display adjustment higher or lower  
Select temperature display to F or C  
Returns to normal operation  
HOLD*  
HOLD*  
HOLD*  
4 LO to 4 HI  
C
HOLD*  
RUN  
* Press HOLD to advance to next item or TIME to move backwards to previous item  
1) Select FA or SL (Fast or Slow) Heating Cycle Rate—The  
PROGRAMMINGYOUR THERMOSTAT  
7
FA setting is frequently used for gas, oil or electric heat. The  
SL setting produces a longer heating cycle which is normally  
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  
1°F and the SL setting cycles at approximately 1.5F°.  
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 tempera-  
tures to be cooler (warmer) when the building is vacant or  
during periods of low activity.  
2) Not Available  
3) 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.  
• During early morning hours, the need for cooling is usually  
minimal.  
Look at the factory preprogrammed times and temperatures shown  
below. 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.  
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.  
Determinethetimeperiodsandtemperaturesforyourweekdayand  
weekend programs. You must program four periods for both the  
weekday and weekend program. However, you may use the same  
heatingandcoolingtemperaturesforconsecutivetimeperiods.You  
can choose start times, heating temperatures, and cooling tem-  
peratures independently for both weekday 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 table at the bottom of the page to plan your  
program time periods and the temperatures you want during each  
period. You may also want to look at the sample program table to  
get an idea of how the thermostat can be programmed.  
4) 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 system  
loses power. It will also wait 5 minutes minimum between  
cooling cycles. This is intended to help protect the compres-  
sor from short cycling. Some newer compressors already  
have a time delay built in and do not require this feature. Your  
compressormanufacturercantellyouifthefeatureisalready  
present in their system. When the compressor time delay  
occurs it will flash the  
the compressor.  
for about five minutes then turn on  
Entering Your Program  
Follow these steps to enter the heating and cooling programs you  
have selected.  
5) 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 tem-  
perature to match your previous thermostat.  
Set Current Time and Day  
1. Press TIME button once. The display will show the hour only.  
6) Select F° or C° Readout—Changes the display readout to  
PM  
EXAMPLE:  
Centigrade or Fahrenheit as required.  
2. Press and hold either  
or  
until you reach the correct  
hour and AM/PM designation (AM begins at midnight; PM  
begins at noon).  
4. Press and hold either  
minutes.  
or  
until you reach the correct  
5. Press TIME once. The display will show the day of the week.  
8. Press PRGM once. “SA SU” (indicating weekend program)  
will appear in the display, along with the start time for the 1st  
heating period and the currently programmed temperature.  
PROGRAMMINGYOUR THERMOSTAT  
CONTINUED FROM FIFTH PAGE  
7
9. Repeat steps 4 through 8 to complete weekend heating  
programming.  
6. Press  
or  
untilyoureachthecurrentdayoftheweek.  
7. Press RUN once. The display will show the correct time and  
room temperature alternately.  
10.When you have completed entering your heating program,  
press RUN.  
Enter Heating Program  
1. Move the SYSTEM switch to HEAT.  
Enter Cooling Temperatures  
2. Press PRGM once. “MO TU WE TH FR” (indicating weekday  
program) will appear in the display. Also displayed are the  
currently programmed start time for the 1st heating period and  
the currently programmed temperature (flashing).  
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 damage.  
MO TU WE TH FR  
AM  
1. Move SYSTEM switch to COOL position.  
EXAMPLE:  
2. Follow the procedure for entering your heating program, using  
your selected cooling times and temperature.  
This display window shows that for the 1st weekday period,  
the start time is 6:00 AM, and 70° is the programmed tempera-  
ture (this example reflects factory preprogramming).  
Check your programming  
Follow these steps to check your thermostat programming one  
final time before beginning thermostat operation.  
3. Press  
or  
to change the displayed temperature to  
your selected temperature for the 1st heating program period.  
1. Move the SYSTEM switch to HEAT position.  
4. Press TIME once (the programmed time will flash). Press  
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  
any time or temperature during this procedure).  
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 tempera-  
ture mode.  
5. Press PRGM once. The currently programmed start time and  
setpoint temperature for the 2nd heating program period will  
appear.  
3. Press RUN.  
4. Move SYSTEM switch to COOL position.  
5. Repeat step 2 to check cooling temperatures.  
6. Press RUN to beging program operation.  
6. Repeat steps 4 and 5 to select the start time and heating  
temperature for the 2nd heating program period.  
YOURTHERMOSTATISNOWCOMPLETELYPROGRAMMED  
AND READY TO AUTOMATICALLY PROVIDE MAXIMUM  
COMFORT AND EFFICIENCY!  
7. Repeat steps 4 through 6 for the 3rd and 4th heating program  
periods. Weekday heating programs are now complete.  
SAMPLE  
Heating/Cooling Schedule Plan (Factory Program)  
Heating/Cooling Schedule Plan  
WEEKEND (2 DAY)  
WEEKDAY (5 DAY)  
WEEKEND (2 DAY)  
WEEKDAY (5 DAY)  
Start  
Time  
Start  
Time  
Start  
Time  
Start  
Time  
Period  
Temperature  
70 F  
Temperature  
70 F  
Period  
Temperature  
Temperature  
1ST  
6:00 AM  
6:00 AM  
1ST  
2ND  
3RD  
4TH  
1ST  
2ND  
3RD  
4TH  
8:00 AM  
5:00 PM  
10:00 PM  
6:00 AM  
8:00 AM  
5:00 PM  
10:00 PM  
62 F  
70 F  
62 F  
78 F  
85 F  
78 F  
82 F  
8:00 AM  
5:00 PM  
10:00 PM  
6:00 AM  
8:00 AM  
5:00 PM  
10:00 PM  
62 F  
70 F  
62 F  
78 F  
85 F  
78 F  
82 F  
2ND  
3RD  
4TH  
1ST  
2ND  
3RD  
4TH  
SPECIFICATIONS  
ELECTRICAL DATA  
Electrical Rating:  
8
9
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:  
-40°F to 150°F  
20 to 30 VAC 50/60 Hz.  
0.05 to 1.2 Amps (Load per terminal)  
1.5 Amps Maximum Total Load (All terminals combined)  
TROUBLESHOOTING  
Reset Operation  
resets the factory defaults. If the thermostat has power, has been  
reset and still does not function correctly contact your heating/  
cooling service person or place of purchase.  
If a voltage spike or static discharge blanks out the display or  
causes erratic thermostat operation you can reset the thermostat  
by pressing  
,
and TIME at the same time. This also  
Symptom  
Possible Cause  
Corrective Action  
No Heat/No Cool/No Fan  
(common problems)  
1. Blown fuse or tripped circuit breaker.  
2. Furnace power switch to OFF.  
Replace fuse or reset breaker.  
Turn switch to ON.  
3. Furnace blower compartment door or  
panel loose or not properly installed.  
Replace door panel in proper position to engage  
safety interlock or door switch.  
No Heat  
1. Pilot light not lit.  
Re-light pilot.  
2. System Switch not set to Heat.  
Set System Switch to Heat and raise temp above  
room temp.  
3. Loose connection to thermostat or system.  
Verify thermostat and system wires are securely  
attached.  
4. Furnace Lock-Out Condition. Heat may also  
be intermittent.  
Many furnaces have safety devices that shut  
down when a lock-out condition occurs. If the  
heat works intermittently contact the furnace  
manufacturer or local service person for  
assistance.  
No Heat (continued)  
5. Heating system requires service or  
thermostat requires replacement.  
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 thermo-  
stat 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 is operating  
correctly.  
No Cool  
1. System Switch not set to Cool.  
Set System Switch to Cool and lower temp below  
room temp.  
2. Loose connection to thermostat or system.  
Verify thermostat and system wires are securely  
attached.  
3. Cooling system requires service or  
thermostat requires replacement.  
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.  
TROUBLESHOOTING  
CONTINUED FROM SEVENTH PAGE  
Symptom  
9
Possible Cause  
Corrective Action  
Heat, Cool or Fan Runs Constantly.  
1. Possible short in wiring.  
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 as described below. If the condition  
persists the manufacturer of your system or  
2. Possible short in thermostat.  
3. Possible short in heat/cool/fan system.  
4. Fan Switch set to Fan On.  
service person can instruct you on how to test the  
Heat/Cool system for correct operation. If the  
system operates correctly, replace the thermostat.  
Furnace Cycles Too Fast or Too Slow  
(narrow or wide temperature swing)  
1. The location of the thermostat and/or the  
size of the Heating System may be  
influencing the cycle rate.  
Digital thermostats normally provide precise  
temperature control and may cycle faster than  
some older mechanical models. A faster cycle  
rate means the unit turns on and off more  
frequently but runs for a shorter time so there is  
no increase in energy use. If you would like to  
increase the cycle time, change the cycle rate to  
“SL” in the configuration menu. It is not possible to  
shorten the cycle time. If an acceptable cycle rate  
is not achieved as received or by changing the  
cycle rate. Contact a local service person for  
additional suggestions.  
Cooling Cycles Too Fast or Too Slow  
(narrow or wide temperature swing)  
1. The location of the thermostat and the size  
of the Cooling System can influence the  
cycle rate.  
The cycle rate for cooling is fixed and can not be  
adjusted. Contact a local service person for  
suggestions.  
Thermostat Setting and Thermostat  
Thermometer Disagree  
1. Thermostat thermometer setting requires  
adjustment.  
The thermometer can be adjusted +/- 4 degrees.  
See Temperature Display Adjustment in the  
Configuration menu.  
Thermostat Does Not Follow Program  
1. AM or PM set incorrectly in program.  
2. AM or PM set incorrectly on the clock.  
3. Voltage spike or static discharge.  
Check current clock and program settings  
including the AM or PM designations for each  
time period. If a voltage spike or a static discharge  
occurs use the Reset Operation listed above.  
Blank Display and/or Keypad  
Not Responding  
1. Voltage spike or static discharge.  
1. Loss of power to thermostat.  
If a voltage spike occurs use the Reset Operation  
listed above.  
Clock Loses or Gains Time  
The thermostat will maintain its program in  
memory even with no power 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.  
Heat or Cool Starts Early  
1. EMR activated.  
See Configuration Menu (Item 4).  

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