White Rodgers 1F95Ez 0671 Emerson Blue Easy Reader Thermostat Installation Instructions 1F95EZ_0671_37 6986C

Emerson Thermostat 1F95EZ-0671 0037-6986

2015-03-28

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Blue Easy Reader Thermostat
Single Stage, Multi-Stage, Heat Pump
Installation Instructions for Model:

Save these instructions for future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS
CAREFULLY BEFORE INSTALLING OR OPERATING THIS
CONTROL COULD CAUSE PERSONAL INJURY AND/OR
PROPERTY DAMAGE.

Model

Programming Choices

1F95EZ-0671

Non-Programmable

7 Day

APPLICATIONS
THERMOSTAT APPLICATION GUIDE
1F95EZ-0671 Thermostat

Maximum
Stages
Heat/Cool

Thermostat
Configuration Options

Thermostat
Applications

Single Stage 1
No Heat Pump (SS1)
Multi Stage 2
No Heat Pump (MS2)

Gas, Oil, Electric, Heat Only,
Cool Only or Heat/Cool
Systems, 2 or 3 wire Hydronic
Zone (Hot Water or Steam)
Systems, 24 Volt or Millivolt

Heat Pump 1
Single Stage Compressor
Heat Pump (HP1)

Single Stage Compressor
Heat Pump Systems - up to 2
Stages Aux./Emergency Heat

3/1

Heat Pump 2
Two Stage or Two
Compressor Heat Pump
(HP2)

Two Stage or Two Compressor
Heat Pump systems - up to 2
Stages Aux./Emergency Heat

4/2

1/1
2/2

SPECIFICATIONS
Electrical Rating:

Battery Power . . . . . . . . . . . . . . . . . . . . . . . . . .
Input-Hardwire . . . . . . . . . . . . . . . . . . . . . . . . . .
Terminal Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setpoint Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rated Differentials:

Heat (Single Stage/Multi Stage) . . . . . . . . . . . .

Cool (Single Stage/Multi Stage) . . . . . . . . . . . .

Heat Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Aux. Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Humidity . . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping Temperature Range . . . . . . . . . . . . . . . . . .
Dimensions Thermostat . . . . . . . . . . . . . . . . . . . . . .

mV to 30 VAC, NEC Class II, 50/60 Hz or DC
20 to 30 VAC
1.5A per terminal, 2.5A maximum all terminals combined
45 to 99°F (7 to 32°C)
Fast
Med.
Slow
0.4 °F
0.6 °F
1.7 °F
0.9 °F
1.2 °F
1.7 °F
0.9 °F
1.2 °F
1.7 °F
0.6 °F
–
1.7 °F
32°F to +105°F (0 to +41°C)
90% non-condensing max.
-40 to +150°F (-40 to +65°C)
4-3/16"H x 6-1/2"W x 1-5/8"D

! CAUTION
To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
Index
Installation
Wiring Connections
Wiring Diagrams
Thermostat Quick Reference
Installer Configuration Menu
Operating Your Thermostat
Troubleshooting

Page
2
2
3
4
5
7
8

ATTENTION: MERCURY NOTICE
This product does not contain mercury. However, this
product may replace a product that contains mercury.
Mercury and products containing mercury must not be
discarded in household trash. Do not touch any spilled
mercury. Wearing non-absorbent gloves, clean up any
spilled mercury and place in a sealed container. For
proper disposal of a product containing mercury or a
sealed container of spilled mercury, place it in a suitable
shipping container. Refer to www.thermostat-recycle.org
for location to send product containing mercury.

PART NO. 37-6986C
www.white-rodgers.com
www.emersonclimate.com

Replaces 37-6986B
1407

INSTALLATION
Power Stealing Switch

WARNING

Thermostat installation and all components of the
control system shall conform to Class II circuits per
the NEC code.

Remove Old Thermostat
Before removing wires from old thermostat, mark wires for
terminal identification so the proper connections will be made
to the new thermostat.

Installing New Thermostat
1.

5.
6.

7.
8.

Pull the thermostat body off the thermostat base. Forcing
or prying on the thermostat will cause damage to the unit.
Place base over hole in wall and mark mounting hole
locations on wall using base as a template.
Move base out of the way. Drill mounting holes. If you
are using existing mounting holes and the holes drilled
are too large and do not allow you to tighten base snugly,
use plastic screw anchors to secure the base.
Fasten base snugly to wall using mounting holes shown
in Figure 1 and two mounting screws. Leveling is for
appearance only and will not affect thermostat operation.
Connect wires to terminal block on base using appropriate
wiring schematic.
Push excess wire into wall and plug hole with a fire
resistant material (such as fiberglass insulation) to prevent
drafts from affecting thermostat operation.
Install 2 "AA" alkaline batteries.
Carefully line the thermostat up with the base and snap
into place.

Battery Location
2 "AA" alkaline batteries are included with the thermostat.
Install the batteries before snapping the thermostat on the
base. Install the batteries in the rear along the top of the
thermostat (see Fig. 1).

The Power Stealing Switches (Fig. 1) should be left in the
"On" position for most systems.
Power Stealing Assist is very reliable to increase battery life,
drawing a small amount of power from the HVAC system. But
on a small number of heating or cooling systems with high
impedance electronic modules you may observe one of the
following conditions to indicate that Power Stealing Assist is
incompatible:
1. The furnace draft inducer motor may run with no call for
heat.
2. The furnace fan may turn on with no call for heat or may
not turn off.
3. The furnace may not turn off when the call for heat ends.
4. The air conditioner may not turn off when the call for cool
ends.
If the Power Stealing Assist method is not compatible with
your system, place the Power Stealing Switches to "Off". This
cancels Power Stealing Assist, operates the thermostat on
batteries and corrects the condition.
Figure 1 – Thermostat Base Multi-Stage 1F95EZ-0671

Mounting
Hole

Place Level
across Mounting Tabs
(for appearance only)

Rear view of thermostat
2 "AA" Batteries

To replace batteries, set system to OFF and remove
thermostat from wall. For best results, use a premium brand
"AA" alkaline battery such as Duracell® or Energizer®. If the
home is going to be unoccupied for an extended period (over
3 months) and
is displayed, the batteries should be
replaced before leaving.

Power Stealing
Switches

* A1 For Damper Control Not Applicable To This Model.

WIRING CONNECTIONS
Refer to equipment manufacturers' instructions for specific
system wiring information. After wiring, see CONFIGURATION section for proper thermostat configuration.
Terminal
Designation

Single Stage

O/B

Heat Pump 1

Heat Pump 2

Changeover Terminal Energized in Heat (B) or Cool (O) for Heat Pump or Damper Systems

No Output

2nd Stage Compressor

No Output

Cool Mode
Compressor Relay

Cool Mode 1st Stage Compressor

Heat and Cool Mode 1st Stage - Heat and Cool Mode 1st Stage Compressor
Compressor

G
RC
RH
C
6
W/E
W2
L

Multi Stage

Wiring diagrams shown are for typical systems and describe
the thermostat terminal functions.

2nd Stage Compressor

Fan Relay
Power for Cooling
Power for Heating
"Common wire from secondary side of cooling (Optional). Required for fault indication, continuous backlight
operation or remote temperature sensor operation"
Powered closed 3rd wire for
No Output
No Output
No Output
3-wire zone valve
Heat Mode
Heat Mode 1st Stage
Heat Mode 2nd Stage,
Heat Mode 3rd Stage,
Emergency Mode 1st Stage
Emergency Mode 1st Stage
No Output
Heat Mode 2nd Stage
Heat Mode 3rd Stage,
Heat Mode 4th Stage,
Emergency Mode 2nd Stage
Emergency Mode 2nd stage
System Diagnostic Terminal - Displays Call for Service

WIRING DIAGRAMS
Figure 2 – Single Stage, SS1, or Multi-Stage, MS2, System (No Heat Pump)
with Single Transformer (Gas, Oil or Electric)
Jumper

O/B

W/E

System

Single
Stage 1
(SS1)

Diagnostic Energized Constantly
Indicator
in
Input
Cool Mode
Cool Mode
or
1st Stage
System
B
Malfunction Energized Constantly
Switch
in Heat, Off,
Input
Emergency
Mode

MultiStage 2
(MS2)

No Output
No
Heat
Output Mode
1st Stage
Cool
Heat Mode
Mode
2nd Stage
2nd
Stage

Blower/
Circulator
Fan Energized
on Call for
Cool (and
Heat if
configured
for Electric
Heat)

Optional

24 Volt 24 Volt
(Hot)
(Hot)
Heat
Cool

24 Volt
(Common)

Comfort Alert II Module
or Similar System
Diagnostic Module

NEUTRAL
120VAC

24VAC
HOT

See Module Instructions
for details

* Common connection required for diagnostic or malfunction indication.

CLASS II
TRANSFORMER

Figure 3 – Single Stage, SS1, or Multi-Stage, MS2, System (No Heat Pump)
with Two Transformer (Gas, Oil or Electric)
Remove Jumper Wire
Jumper

O/B

W/E

between RH & RC

System

Single
Stage 1
(SS1)

Energized Constantly
in
Cool Mode

Diagnostic
Indicator
(Optional)

MultiStage 2
(MS2)

Energized Constantly
in Heat, Off,
Emergency
Mode

No Output
No
Heat
Cool Mode Output Mode
1st Stage
1st Stage
Heat Mode
Cool
2nd Stage
Mode
2nd
Stage

Blower/
Circulator
Fan Energized 24 Volt 24 Volt Optional
on Call for
24 Volt
(Hot) (Hot)
Cool (and
(ComHeat Cool
Heat if
mon)
configured
for Electric
Heat)

NEUTRAL

120VAC

24VAC

NEUTRAL

HOT

24VAC

COOLING

HOT

CLASS II
TRANSFORMER

HEATING
CLASS II
TRANSFORMER

* Common connection required for diagnostic or malfunction indication.

Figure 4 – Heat Pump Systems, HP1 (Single Stage Compressor System with Gas or Electric backup),
HP2 (Multi-Stage Compressor or Two Compressor System with Gas or Electric backup)
Jumper

O/B

W/E

System

Heat Pump 1
(HP1)

Heat Pump 2
(HP2)

Heat Mode - 2nd
Heat Mode - 3rd
Stage, Emergency Stage, Emergency
Mode - 1st Stage Mode - 2nd Stage Blower/
+
Note: Dual Fuel option +Note: Dual Fuel option Circulator Fan
Energized in
No
de-energizes Heat mode de-energizes Heat mode
Optional
Output
stage 1 (compressor)
stage 1 (compressor) Energized on
Diagnostic Cool Mode Heat and
when auxiliary heat
when auxiliary heat
Call for Heat 24 Volt 24 Volt 24 Volt
Indicator
Cool Mode
is energized
is energized
(Hot)
(Hot)
(Comor
Cool.
B
or System
1st Stage
Heat Mode-4th
Heat Mode - 3rd
Heat
Cool
mon)
Malfunction Energized in (Compressor) 2nd
Stage, Emergency Stage. Emergency Set Elect/Gas
Stage
Heat, Off,
Switch
Mode - 1st Stage Mode - 2nd Stage Option for
+
+
(ComNote: Dual Fuel option Note: Dual Fuel option Emergency
Emergency
Heat mode de-energizes Heat mode mode
pressor) de-energizes
Mode
stage 1 (compressor)
stage 1 (compressor)

when auxiliary heat
is energized

Comfort Alert II Module
or Similar System
Diagnostic Module
See Module Instructions
for details

NEUTRAL
120VAC

24VAC
HOT

* Common connection required for diagnostic or malfunction indication.
+
Dual Fuel option, if selected turns off compressor(s) when Auxiliary stages energize.

CLASS II
TRANSFORMER

Figure 5 – 3-Wire (SPDT) Heat Only Zone Valve Wiring
Jumper

Opens
Valve
(4)

Blower/Circulator
Fan Energized

System
Single Stage
3-wire
Zone Valve
application

Closes
Valve
(6)

24 Volt 24 Volt
(Hot)
(Hot)
Cool
Heat
(5)

Constant

24 Volt
(Common)

NEUTRAL
120VAC

24VAC
HOT
CLASS II
TRANSFORMER

THERMOSTAT QUICK REFERENCE
Home Screen Description
Figure 6 – Home Screen Display
Room
Temperature

Setting
Temperature

Battery Level Indicator
Indicating the current power level
of the 2 “AA” batteries.
Full power remaining.
Half power remaining.
The batteries should
Change
be replaced at this time with 2 new
premium brand “AA” Alkaline batteries.
(See page 2 for more details).

Menu, Copy,
or Hold Button
Sched or
RunSched
Button
Fan
Indicator

System
Indicators

Heat
Button

A/C or
Advance
Day Button

OFF or
Time
Button

Fan or
Run Button

Figure 7 – Programming & Configuration Items
13

14
15
9

7
6
1
2

Programming and Configuration Items
1 “Heat" “A/C” “Off” identifies button. When filled indi-

cates system mode selected.

2 "

" indicates thermostat configured for Heat Pump.
"Aux" indicates Auxiliary (Emergency) stage is selected.

3 "Adv Day" identifies button when in schedule mode.

10 "Setting" indicates the setpoint temperature.
11 "Hold Temp" indicates temporary hold or "Hold" indi-

cates hold mode.

12 "Morn" "Day" "Eve" "Night" indicates period being

programmed or current program in Run mode.

4 "Time" identifies button when in schedule mode.

13 "A" "P" indicates time as Morning (A) or Evening (P).

5 "Fan" identifies button. When filled indicates Fan is on.

14 "Mon - Sun" indicates day of week.

6 "Run" identifies button to begin normal operation.

15 "Month" "Year" "Date" indicates the Month Year or

7 "Sched" identifies button to be used during program-

ming or "Run Sched" identifies button to return to
normal operation.

8 "Hold" "Copy" "Menu" identifies button.
9 "Limit" indicates temperature is adjusted to the limit set

in the configuration menu.

Date when setting time.

16 "Call For Service" indicates a diagnostic fault in the

heating/cooling system. It does not indicate a fault in the
thermostat.

17 "Change" indicates when batteries are low and should

be replaced.

INSTALLER/CONFIGURATION MENU
With Heat or A/C selected, press and hold the Menu button for at least 5 seconds. The display will show item #1 in the
table below. Press Menu to advance to the next menu item. Press
or
to change a menu item options.
INSTALLER/CONFIGURATION MENU
Menu HP SS
Ref.

Press
Button

Displayed
(Factory Default)

Press
or
to select from listed
options
HP 1, HP 2, SS 1

Comments

(MS 2)

(GAS) for SS or MS
(ELE) for HP1, HP2

ELE or GAS

GAS setting: furnace controls the blower
ELE setting: thermostat controls the blower

(On) E

OFF

–

(ME) Cr Heat

SL, FA

–

(ME) Cr A/C

SL, FA

(ME) Cr A/C
or
(FA) Cr Aux Heat

SL, FA

Selects Energy Management Recovery (EMR)
On or OFF.
(Not available in non-programmable mode)
Selects Adjustable Anticipation, cycle rate, Heat
(This item only appears when MS 2 or SS 1 is
selected above)
Selects Adjustable Compressor Anticipation
(Heat Pump) this item only appears when
HP 1, HP 2 is selected above
Selects Adjustable Anticipation, cycle rate, cool
(when MS 2 or SS 1 is selected above) or
Selects the cycle rate for Auxiliary stage (when
HP 1 or HP 2 is selected above)

(OFF) CL

Selects Compressor Lockout Off or On

Heat A/C Off
or
Aux Heat A/C Off

Heat A/C Off,
Heat Off with Fan icon,
Heat Off without Fan icon
A/C Off

System Mode Configuration

Selects Compressor Optimization

(OFF) CO

Selects Multi-Stage (MS 2 No Heat Pump),
Heat Pump 1 (HP 1, 1 compressor),
Heat Pump 2 (HP 2, 2 compressor or 2 speed
compressor), or Single Stage (SS 1)

(On) dL

OFF

Selects Display Light On or OFF

0 HI
(current temperature)

1 HI, 2 HI, 3HI, 4 HI,
1 LO, 2 LO, 3 LO, 4 LO

Adjustable Ambient Temperature Display

°C

Selects Fahrenheit/Celsius Temperature Display

°F
(current temperature)
(0) P

Defaults to P (0) non-programmable
P (7) is 7-day programming

PS (2)
Day, Night

4
Morn, Day, Eve, Night

–

(On) FA Heat

OFF

Selects Program periods per day:
4 = Morn, Day, Eve, Night
2 = Day, Night
(Skipped if non-programmable)
Fast Heat option may be disabled by
selecting OFF. NA to SS or HP1 config.

(On) FA A/C

OFF

Fast Cool option may be disabled by
selecting OFF. NA to SS or HP1 config.

(On) dS

Off

Selects Automatic Daylight Saving Time option

(99) HL Heat

62 to 98

Select's Limited HEAT Range

(45) LL A/C

46 to 82

Select's Limited A/C Range

–

(0) dF

1 to 9

(60) Cd

0 to 99

(o) A/C On

Heat (b)

Selects dF (Dual Fuel) setting. 0 is Off
(If Dual Fuel option is required, a selection of 5
is recommended)
Selects compressor delay in seconds when dF
is greater than 0
Selects operation of the reversing valve terminal
(O/B) output as an O or B terminal
Returns to Normal Operation

INSTALLER/CONFIGURATION MENU
1) This control can be configured for:
MS 2 – Multi-Stage System (no heat pump)
HP 1 – Heat Pump with one stage of compressor, Gas

or Electric backup
HP 2 – Heat Pump with two stage compressor or two
compressor system, Gas or Electric backup
SS 1 – Single Stage System
2) GAS or Electric (ELE) fan operation. If the heating system
requires the thermostat to energize the fan, select ELE.
Select GAS if the heating system energizes the fan on a
call for heat.
3) Energy Management Recovery: (this step is skipped if
configured to be non-programmable).
Energy Management Recovery (E) On enables the
thermostat 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: E On is selected and your heating is
programmed 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
and Heat Pump systems allow more time per degree,
because it takes longer to reach set temperature.
4, 5 & 6) Cycle Rate Selection – The factory default setting for
Heat and Cool modes, SS1, MS2, is medium cycle (ME). For
Heat Pump, HP1, HP2, the default setting is medium (ME).
For Aux, the default setting is fast cycle (FA). To change cycle
or
button.
rate, press the

Cycle rate differentials for different settings are:
MODE
Fast
Medium Slow
FA
ME
SL

Heat (SS1, MS2)
Cool (SS1, MS2)
Heat Pump (HP1, HP2)
AUX (HP1, HP2)

0.4°F
0.9°F
0.9°F
0.6°F

0.6°F
1.2°F
1.2°F
-

1.7°F
1.7°F
1.7°F
1.7°F

7) Select Compressor Lockout CL OFF or ON – Selecting
CL ON will cause the thermostat to wait 5 minutes 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
lockout feature is already present in their system. When
the thermostat compressor time delay occurs, it will flash
the setpoint for up to five minutes.
8) System Mode Configuration – This thermostat is
configured for Heat and Cool (SYSTEM switch with Heat
A/C Off) default. It can also be configured for Heat only with
fan (Heat Off fan), Heat only without fan (Heat Off) or Cool
only (Cool Off).
9) Compressor Optimization – CO provides a delay in
circulator fan operation after the compressor turns on or
off. With CO selected ON, when the compressor turns
on (for a call for heat in heat pump or a call for cool) the
fan will be delayed for five seconds before turning on to
allow the air to be heated or cooled. After the compressor
turns off for call for cool, the fan will continue to run for 20
seconds to circulate all of the cooled air. If CO is set to
OFF, there will be no delay in fan operation.

10) Select Backlight Display – The display backlight improves
display contrast in low lighting conditions. When the "C"
terminal is powered, selecting backlight dL ON will keep the
light on continuously. Select backlight OFF will turn the light
on momentarily after any button is pressed. When the "C"
terminal is not powered, the light will be on momentarily
after any button is pressed no matter whether the backlight
is selected ON or OFF.
11) Select Temperature Display Adjustment 4 LO to 4 HI –
Allows you to adjust the room temperature display up to 4°
higher or lower. Your thermostat was accurately calibrated
at the factory, but you have the option to change the dis-
play temperature to match your previous thermostat. The
current or adjusted room temperature will be displayed.
12) Select F° or C° Readout – Changes the display readout
to Celsius or Fahrenheit as required.
13) Program Options: Selects configuration for 7 day (7) or
non-programming (0) mode. The default setting is 0, indicating non-programming. The programs per week can be
or
buttons. A selection
changed by pressing the
of 0 days for non-programmable will eliminate the need for
EMR, and that step in the menu will be skipped.
14) Program Steps per day – This control can be configured
for 4 or 2 program steps per day. Default is "2 PS" and
can be toggled between 4 PS and 2 PS.
15 & 16) Select Fast Second Stage ON or OFF – Heat
pump or Multi-stage only, in the run mode, with the fast
Heat feature enabled (On FA Heat), if the Heat setpoint
temperature is manually raised by 3°F (2°C) or more
the second stage
above the actual temperature using
will energize immediately. With FA OFF, second stage will
not energize until the setpoint temperature is 1°F or more
above actual temperature for more than ten minutes. The
Fast Cool feature (FA Cool) provides the same controls
when the setpoint temperature is lowered.
17) Select Daylight Saving Time Calculation – This feature
will allow the thermostat to calculate the DST automatically and apply it to the Real Time Clock display. Default
or
touch keys to select the feature OFF.
On. Use
18) Limited Heat Range – This feature provides a maximum
setpoint temperature for heat. The default setting is 99°F. It
can be changed between 62°F and 98°F by pressing the
or
button.
19) Limited Cool Range – This feature provide a minimum
setpoint temperature for cool. The default setting is 45°F. It
can be changed between 46°F and 82°F by pressing the
or
button.
20) Select Dual Fuel Setting (dF) – HP1 or HP2 systems. 0
is default OFF for Elect. Aux. If your system has a fossil
fuel (gas or oil) Auxiliary heat, select 1 to 9. See Dual Fuel
setting and compressor delay on the following page.
Select Compressor Delay (Cd) – Available only if dF 1 to
9 is selected above. After the auxiliary heat is turned on,
the compressor(s) shut down is delayed for the time selected (in seconds). This delay is factory set to 60, but can
or
buttons.
be set in the range of 0 to 99 using
21) Select Reversing Valve Output – The O/B option is
factory set at "O" position. This will accommodate the
majority of heat pump applications, which require the
changeover relay to be energized in COOL. If the thermostat you are replacing or the heat pump being installed
with this thermostat requires a "B" terminal, to energize
the changeover relay in HEAT, the O/B option should be
set at "B" position.

OPERATING YOUR THERMOSTAT
Check Thermostat Operation

NOTE

To prevent static discharge problems, touch side of
thermostat to release static build-up before touching
any keys.
If at any time during testing your system does not operate
properly, contact a qualified service person.

Fan Operation

If your system does not have a G terminal connection, skip to
Heating System.
1. Turn on power to system.
" to
2. Press FAN button. The display will change from "
"Fan" and the blower should begin to operate.
3. Press FAN button again. The display will change from "Fan"
to "
" outlined and the blower should stop immediately.

! CAUTION
Do not allow the compressor to run unless the
compressor oil heaters have been operational for 6
hours and the system has not been operational for at
least 5 minutes.

Heating System
1. Press the HEAT button to select HEAT. If the auxiliary
heating system has a standing pilot, be sure to light it.
to adjust thermostat setting to 1° above room
2. Press
temperature. A click will be heard from the thermostat and
the heat system should begin to operate. If the system
configuration is set to HP1 or HP2 and setpoint temperature display is flashing, the 5 minute compressor lockout
feature is operating (see Configuration menu, item 7).
3. If your system configuration is set at MS2, HP2 or HP1,
adjust temperature setting to 3° above room temperature.
The thermostat will click and the second stage will begin
to operate.
4. Press
to adjust the thermostat below room temperature. The thermostat will click several times as stages
de-energize. The heating system should stop operating.

Second Stage Time Delay

Your thermostat is designed to determine the optimum time to
activate the second stage. Simply raising the temperature in
heating or lowering it in cooling will not always force the thermostat to bring the second stage on quickly. There is a time
delay from 0-30 minutes depending on the performance of the
first stage of the system.
EXAMPLE: For the last 2 hours the thermostat is set on 70o
and the room temperature is 70o with the equipment using
only the first stage of heat. Since the equipment is keeping the temperature within 1o of setpoint, the thermostat will
delay second stage for a longer time if you manually raise
the temperature or if the room temperature quickly changes.
Once the second stage comes on, it will come on sooner the
next time there is a difference between the setpoint and the

room temperature. The net effect of the staging program is
that when the first stage is capable of making temperature the
second stage will delay longer. When the thermostat calculates that first stage cannot make temperature in a reasonable time, the second stage will come on sooner. This built in
function automatically optimizes the use of additional stages
of heat or cool.

Auxiliary (Emergency) System
AUX bypasses the Heat Pump to use the heat source wired
to terminal W/E on the thermostat. AUX is typically used
when compressor operation is not desired, or you prefer
back-up heat only.
1. Press and hold HEAT button for at least 5 seconds. "Aux"
will change to "Aux".
2. Press
to adjust thermostat setting above room temperature. The Auxiliary heating system will begin to operate.
to adjust the thermostat below room tempera3. Press
ture. The Auxiliary heating system should stop operating.
4. To return to Heat Pump mode press “HEAT” button. "Aux"
will change to "
"

! CAUTION
To prevent compressor and/or property damage, if the
outdoor temperature is below 50°F, DO NOT operate
the cooling system.

Cooling System
1. Press A/C button to select A/C.
2. Press
to adjust thermostat setting below room
temperature. The blower should come on immediately at
high speed, followed by cold air circulation. If the setpoint
temperature display is flashing, the compressor lockout
feature is operating (see Configuration menu, item 7).
3. Adjust temperature setting to 3° below room temperature.
A click from the thermostat will be heard and the second
stage cooling should begin to operate.
4. Press
to adjust the temperature setting above room
temperature. The thermostat will click several times and
the cooling system should stop operating.

Dual Fuel Setting
(Configuration Menu item 20)
Heat Pumps with gas or oil furnace Auxiliary heat are called
Dual Fuel systems. Step 20 in the configuration menu is a
Dual Fuel (dF) option that uses software logic to determine
when to switch to gas heat and shut down the compressor.
This eliminates the need for a separate fossil fuel kit.
To configure the thermostat for Dual Fuel, select a setting
from 1-9. An initial selection of 5 is recommended. A higher
number will provide a smaller stage separation so the Auxiliary heat will start sooner providing more comfort. A lower
number will provide a larger stage separation delaying the
start of the Auxiliary heat providing more economy. A selection of -0- cancels the dual fuel option and is used for heat
pump systems with electric heat auxiliary (non-dual fuel
systems).

TROUBLESHOOTING
Reset Operation
Note: When thermostat is reset, installer configuration menu settings and programming will reset to factory settings.
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you can reset the thermostat
by removing the wires from terminals RH and RC (do not short them together) and removing batteries for 2 minutes. After
resetting the thermostat, replace the wires and batteries. If the thermostat has been reset and still does not function correctly
contact your heating/cooling service person or place of purchase.
Note: Be sure to review the installer configuration menu settings.
To reset the programming, clock and configuration settings, press the
,
and FAN button simultaneously. The
thermostat should go blank and then all segments will be displayed momentarily.
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.
3. Furnace blower compartment door or
panel loose or not properly installed.
4. Loose connection to thermostat or system.
1. Pilot light not lit.
2. Furnace Lock-Out Condition. Heat
may also be intermittent.

Replace fuse or reset breaker.
Turn switch to ON.
Replace door panel in proper position to engage safety
interlock or door switch.
Tighten connections.
Re-light pilot.
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 HVAC service
person for assistance.
Diagnostic: Set System 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 HVAC service
person to verify the heating is operating correctly.

No Heat

3. Heating system requires service or
thermostat requires replacement.

No Cool

1. Cooling system requires service or
thermostat requires replacement.

Same 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.

Heat, Cool or Fan
Runs Constantly

1. Possible short in wiring.
2. Possible short in thermostat.
3. Possible short in heat/cool/fan system.
4. FAN Switch set to Fan ON.

Check each wire connection to verify they are not shorted
or touching together. No bare wire should stick out from
under terminal block. Try resetting the thermostat as described above. If the condition persists 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.

Thermostat Setting &
Thermostat Thermometer
Disagree

1. Thermostat thermometer setting
requires adjustment.

The thermometer can be adjusted +/- 4 degrees. See
Temperature Display Adjustment in the Configuration
Menu section.

Furnace (Air Conditioner)
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 provide precise control and cycle
faster than older mechanical models. The system turns
on and off more frequently but runs for a shorter time
so there is no increase in energy use. If you would like
an increased cycle time, choose SL for slow cycle in the
Configuration menu reference, steps 4 through 6. If an acceptable cycle rate is not achieved, contact a local HVAC
service person for additional suggestions.

Homeowner Help Line: 1-800-284-2925

White-Rodgers is a business
of Emerson Electric Co.
The Emerson logo is a
trademark and service mark
of Emerson Electric Co.

www.white-rodgers.com
www.emersonclimate.com

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