- My heating
or cooling does not work. What can I do?
No Heat:
With the system set to heat, when the setpoint temperature
is raised or lowered past the room temperature, the
thermostat will make a soft click sound within about
5 seconds. Usually the sound indicates correct thermostat
operation. If the heat does not come on after raising
the temperature and hearing the click, check
the fuses or breakers, make sure the furnace is switched
on, and verify the blower compartment door is closed
properly. If no click sound is heard try resetting
the thermostat as described below.
No Cool:
Air conditioning systems usually include an outdoor
compressor and an indoor blower. With the thermostat
set to COOL and the temperature lowered below the
room temperature by a couple of degrees, there can
be up to a five minute delay before the thermostat
activates the compressor and an indoor blower. If
both the compressor and an indoor blower are running
and the air is not cool it may indicate loss of refrigerant
in the compressor. If the blower or compressor do
not come on or do not shut off try the reset operation
below.
Reset Operation:
90 Series Premium thermostats have a sequence of buttons
(press and release PROGRAM RUN,
then momentarily press FAN, TIME BACK, and the Temp
Down arrow at the same time) to reset it to
the factory defaults. If a no heat or no cool condition
persists after resetting the thermostat you may
wish to contact your heating and cooling person for
assistance. If a Multi-stage or Heat-Pump model
thermostat does not respond when keys are pressed,
or the thermostat is not operating properly, use the
reset button located on the back of the thermostat
body. Thermostat programming and configuration will
not be affected by pressing the reset button but the
clock will need to be reset.
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- My thermostat
is reading in Celsius. How do I change it to Fahrenheit?
Consult
the installation instructions “Configuration Menu”
section.
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- My
thermostat does not display the temperature my thermometer
reads. Is there an adjustment to change the display?
The
temperature display on a digital thermostat will normally
read very accurately. If however, the heating and/or
cooling system is oversized or undersized or the location
of the thermostat is not ideal it can cause the temperature
display for the room to read high or low. The 90 Series
allows an adjustment in the “Installer Table/Configuration
Menu” section. See installation instructions/Operating
Manual to adjust the temperature display.
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- The
display shows the word or flashes BATTERY. What does
it mean?
Battery
(Flashing) on Display
Battery flashing or blinking on the digital display
indicates low batteries. If the batteries have recently
been changed and the thermostat continues to indicate
low batteries, use a pencil eraser to polish each
of the battery contacts inside the back of the thermostat.
Do not bend them up and down when polishing or you
might break them. When complete, they should all be
as shiny as a mirror. This will assure proper battery
back-up, allow the backlight to work correctly and
remove the flashing battery symbol from the screen.
Battery
(Solid) on Display
The battery symbol (not blinking) indicates a loss
of power (24 volts) from the heating and cooling equipment
to the thermostat. Normally the heating and cooling
do not operate when the battery indicator is on. If
the battery indicator is on, check the fuses or breakers,
make sure the furnace is switched on, and verify the
blower compartment door is closed properly. The battery
display is designed to indicate the thermostat is
running on batteries, so replacing batteries has no
effect on the indicator. Note: Some heat only systems
(zoned systems) disconnect power from the thermostat
during a normal heating cycle and display the battery
symbol. Millivolt heating systems always indicate
battery because they do not supply 24 volts to the
thermostat.
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- How
do I bypass (not use) the program?
To
bypass the program and operate the thermostat manually
(like a mechanical model) press SYSTEM button to select
Heat or Cool (whichever your prefer) and press HOLD.
Use the Temp Up or Temp Down buttons to set the thermostat
on the temperature you want. The temperature setting
you choose will be held until you manually change
it using the Temp Up or Temp Down buttons. The thermostat
will remain in the HOLD mode when you change temperature
and maintain whatever temperature you set. If you
decide to return to the program, press PROGRAM RUN
to cancel the hold feature.
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- My
furnace (air conditioning) cycles too fast (slow). Is
there an adjustment?
Adjustable Heating and Cooling
Cycle Times (also called Anticipation ).
90 Series Premium thermostats
have a feature that allows you to increase or decrease
the cycle times in
heating and cooling. This is useful if you think your
cycle times are too long or too short. 90 Series
Premiums are adjusted by going into the Installer/Configuration
Menu; see your Installation/ Operating
Instructions for adjustment.
The higher the number you select, the longer the cycle.
The lower the number you select, the shorter the cycle.
The range of adjustment for HEATING is from 2 to 40.
The factory Preset is 5. The range of adjustment for
COOLING is from 9 to 40. The factory Preset is 14.
The cooling will not go below 9 because compressors
require a longer cycle.
The Heat-Pump models also have an AUXILIARY CYCLE
rate adjustment that can be adjusted in the Installation
Instructions Installer table. The adjustment range
for Auxiliary (heat pump only) is from 1 to 40. The
factory default for models 1F92-371, 1F93-380, 1F94-371
and 1F95-377 is (6). The factory default for model
1F95-391 is (8).
The chart below shows how this adjustment range affects
thermostat performance.
|
|
HEATING†
|
COOLING†
|
| Anticipation Reference Number |
Run Time in minutes
|
Differential Temp ºF
|
Run Time in minutes
|
Differential Temp ºF
|
| 2-8
|
4
– 6 |
0.4
– 0.6 |
N/A
|
N/A
|
| 9-20
|
6
– 10 |
0.6
– 1.0 |
6
– 10 |
0.6
– 1.0 |
| 21-40
|
10
– 16 |
1.0
– 1.6 |
10
– 16 |
1.0
– 1.6 |
| †
These numbers are approximate and represent
operation with a typical system. Actual temperature
differentials and run times will vary based
on your building and equipment, as well as outdoor
temperature conditions. |
Your thermostat is designed to
cycle on and off in heating or cooling, keeping your
building in an accurate temperature range. This maximizes
your comfort by keeping the room temperature very
close to the temperature you set. It is not unusual
for your thermostat to be set for 70 and cycle on
and off at 70 keeping you right on target.
A
note on older style thermostats;
Anticipation on older style thermostats (mercury bulb
or mechanical) used the current draw of the equipment
to set the anticipation. Some heating and cooling equipment
manufacturers still refer to setting the anticipator
to the current draw of the equipment. This does not
apply to your new digital thermostat. Right from the
box your new thermostat will do an excellent job of
keeping your building at an accurate temperature. The
information above allows you to customize the performance
of your digital thermostat to your requirements.
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- Why
does the blower fan keep running after the system has
shut off?
Normally
the blower will turn off a within a few minutes after
the call for heat or cool. The blower running after
the system shuts off may indicate (1) the thermostat
is set to FAN ON, (2) the fan has been programmed
to run at that time period or (3) something has damaged
the thermostat or equipment. If the thermostat display
indicates FAN ON, press the fan switch once to set
it to FAN AUTO, meaning the fan will cycle only
with the equipment. If the display indicates PRG FAN
(Program Fan), sometime during programming, the FAN
switch was pushed. To remove PRG FAN (Program Fan),
check all of the programmed times and temperatures.
When you encounter PRG FAN, press the FAN switch to
remove it from that time period in the program. As
a final test, switch the thermostat to OFF. Verify
that Fan On or Fan Auto is not displayed. If the fan
continues to run, you may want to contact your heating
and cooling service person for assistance.
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- Do
I have to program a stop time for each program period?
There
is no need to select a time to stop a programming
period. Starting a new programming period will stop
the previous program period.
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- My
display light does not work. Can it be fixed or replaced?
The display light in the 1F90 series is not a replaceable
item. On single stage thermostats (1-heat/1-cool)
the light uses battery power. If the light is not
coming on, replace the batteries and/or clean the
battery contacts inside the back of the thermostat.
Use a pencil eraser to gently polish each of the battery
contacts. Do not bend them up and down or they may
break. When complete they should be as shiny as a
mirror. This will assure proper battery back-up and
allow the backlight to work correctly. The multi-stage
and heat pump models obtain power for the light from
the 24 volt transformer so if anything in the system
interrupts power to the thermostat the light will
not operate.
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- My
thermostat does not follow my program. What should I
do?
The
most common reasons why a thermostat does not follow
your program are:
1. AM or PM set incorrectly in program.
2. AM or PM set incorrectly on 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 static discharge occurs use the RESET
operation by pressing PROGRAM RUN once
and release, and then press FAN, TIME BACK and TEMPERATURE
DOWN arrow at the same time and hold until your display
goes blank then release. Models with EMR (Energy Management
Recovery) start early to make the temperature they
are programmed for by the time specified in the program.
See the Configuration Menu of your thermostat Operating
Instructions for information on how to disable EMR
if you do not want the thermostat to start early.
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- Between
the Heating and Cooling seasons I want to turn my system
off. Will this change my programming?
Any time you wish to turn your system off, simply
press the SYSTEM button until the display shows OFF.
This will not affect your thermostat's programming
in any way. To turn the system back on, press the
SYSTEM button until HEAT or COOL is displayed. The
system will begin operating according to the current
thermostat program or temperature setting.
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- Do
I have to reprogram my thermostat after I change my
batteries?
90 Series
Premium models will retain the last program entered
indefinitely without power or batteries.
However you will have to reset your clock and day
settings.
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- Why
can I not raise my temperature in Heating or lower my
temperature in Cooling when in the Auto mode?
The thermostat has a feature called Automatic Changeover
that allows it to switch from heat to cool or cool
to heat automatically. It will also indicate if you
program or adjust the temperatures so there is a conflict
between heat and cool (heating temp higher than the
cooling or cooling lower that the heating temperature).
The thermostat will flash to indicate the conflict
in the heat and cool temperatures. Remember to program
the cooling temperatures higher than the heating temperatures
to avoid a conflict.
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- What
does CHCK PAD mean on the display and how do I reset
it?
This
feature displays the words CHCK PAD (check humidifier)
after a set time of humidifier operation.
This is a reminder to maintain or clean your humidifier.
When CHCK PAD is displayed, you can clear it by
pressing the SERVICE button.
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- Why
does my display read HUMD MX? What does this mean?
If the
heating system is operating and there is a demand
for humidity, then the humidifier will operate. If
the demand for humidity is not satisfied for ten consecutive
heat cycle operations, the display will show the word
HUMD for one second and the word MX for one second
signaling maximum possible humidity is reached.
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- Why
can I not set my thermostat to HEAT, COOL, or AUTO?
Your
thermostat from the factory is configured to operate
Heat, Off, Cool, or Auto. Refer to your Installation
Instructions Installer Table if you wish to set it
for heat only, cool only, or reset it to Heat,
Cool and Auto.
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- What
is the E2/P switch on my thermostat for?
On the
1F92-371, 1F93-380, 1F94-371, 1F95-371 and 1F95-377
the E2/P switch controls how the E2/P terminal of
the thermostat will be energized. When the switch
is in the E2 position (down), the E2/P terminal will
be energized only when in emergency heat. When the
switch is in the P position (up), the E2/P terminal
will always be energized except when in emergency
heat. Consult the equipment manufacturer or a qualified
heating/cooling service person if your system requires
an E2 or P terminal output before setting this switch.
If your system has no connection to E2/P, no change
in the switch setting is required.
On the 1F95-391 the E2/P Switch is located on the
back of the thermostat body. This switch controls
how the DHM terminal will be energized.
1. In the P position (up) the DHM terminal will be
energized on a call for dehumidification.
2. In the E2 position (down) the DHM terminal will
always be energized except on a call for dehumidification.
The switch must be in the E2 position on some electronically
controlled variable speed blower systems.
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- Why
does my system run with setpoint and room temperature
the same?
A cooling
example as the room temperature falls you will eventually
reach the setpoint temperature. The System will continue
to run until it reaches the low side of the temperature
setting. As an example: If set to 78° with the
room temperature falling the thermostat will continue
to call for cool as the temperature decreases in the
following manner. 78.9°, 78.8°, 78.7°,
78.6°, 78.5°, 78.4°, 78.3°, 78.2°.
At approximately 78.2° the thermostat will quit
calling for cool. This is why it is not unusual for
the room temperature and set temperature to read the
same but the system continues to run. The amount of
time it takes for the system to shut off is dependent
on system sizing, thermostat location, etc. Note:
The thermostat only displays whole numbers. Internally
the thermostat calculates decimals. In heating as
the room temperature increases the system will continue
to run until the thermostat reaches the high side
of the temperature setpoint.
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- My
thermostat is resetting on its own. How can I fix this
problem?
For
Single Stage models there are 3 possibilities to consider
(excluding tampering):
Loss of power from the system and
back-up batteries not functioning.
You may want to see if the thermostat maintains the
display when removed from the subbase to
determine if the batteries are functioning on power
loss. You may want to check the fuses or breakers,
the on/off switch on the furnace and the door to the
blower compartment. If the blower compartment door
is loose there may be a switch inside the door that
disconnects power to your system. Also consult the
furnace manufacturer to see if they have any other
ideas on what could drop out the system power.
Static electricity or a voltage
spike from the heating equipment might be
resetting the thermostat. Static electricity can be
eliminated by touching something before touching the
thermostat to dissipate the static charge. A voltage
spike from the equipment can be eliminated using an
isolation relay as described in the link below.
http://www.white-rodgers.com/pdfs/instruction_sheets/0037_5426_A.pdf
You can also check the wire routing to verify the
thermostat or remote wires are not running parallel
to high voltage lines with high inductive loads that
could (in extreme cases) create a voltage spike at
the thermostat.
For Multi-Stage or Heat Pump staging models
there are other possibilities to consider and they
are as follows:
Loss of power from the system. You
may want to check the fuses or breakers, the on/off
switch on the furnace and the door to the blower compartment.
If the blower compartment door is loose there may
be a switch inside the door that disconnects power
to your system. Also consult the furnace manufacturer
to see if they have any other ideas on what could
drop out the system power.
Static electricity. Static electricity
can be eliminated by touching something before touching
the thermostat to dissipate the static charge.
A voltage spike from the heating
equipment might be resetting the thermostat and if
you have a system that generates a high voltage spark
(D.S.I.) you may want to contact the Equipment manufacturer
for information on how to eliminate that condition.
You can check the wire routing to
verify the thermostat or remote wires are not running
parallel to high voltage lines with high inductive
loads that could (in extreme cases) create a voltage
spike at the thermostat.
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- What
do AUX, EMER, and MALF indicators mean on a Heat Pump
Thermostat?
Aux.
= Auxiliary Heat or the second stage of heat in the
Heat mode. This is energized when the Heat
Pump is not keeping up with the thermostat setting.
It is normal operation with most pumps for the
thermostat to call for auxiliary heat.
Emer. = Emergency Heat. When switched to Emergency
the thermostat bypasses the pump and uses the back-up
heat. This is useful if the pump is not operating
correctly or if the temperature outside is so cold
that the pump is not economical to run.
Malf. = Malfunction. Malfunction indicates the heat
pump system is sending a signal to the Malfunction
Light on the thermostat terminal marked “L”. It does
not indicate a malfunction in the thermostat. The
manufacturer of the Heat Pump system can determine
the likely cause of malfunction indication on the
thermostat. In many heat pump systems Emergency and
Auxiliary heat are the same source. If you switch
the thermostat to Emergency it will bypass the heat
pump and bring on the back-up heat. If you leave the
thermostat in the Heat mode it will call for Auxiliary
when the pump is not keeping up with your setpoint
temperature. Some systems will light both Emergency
and Auxiliary at the same time if the source of back-up
heat is the same heater. Emergency is energized on
a call for heat in the Emergency heat mode.
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- How
does the thermostat decide to bring on second (and/or
third) stage of heat or cool?
Multi-stage
and Heat Pump 90 Series Premium thermostats are 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 if the system has been reaching
your setpoint using the first stage. The time element
(0-30 minutes) of the delay varies depending on the
performance of the first stage. In Heating, for example,
assume for the last 2 hours the thermostat is set
on 70° and the room temperature is 70° with
the equipment using only the first stage of heat.
The thermostat calculates (internally) the performance
of the system. Since the equipment is keeping the
temperature within 1° 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 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 is a built in function that automatically
optimizes the use of additional stages of heat or
cool.
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- Does
my thermostat sense humidity from the thermostat or
the remote sensor(s) that are installed?
The
displayed room humidity% is sensed from the thermostat
location only.
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- What
does Call Serv UV mean on my thermostat display?
The
Call Serv UV on the thermostat display signifies that
a Call for Service of UV Bulb is needed after a set
time of UV bulb operation. This is a reminder to replace
your UV light bulb to maintain maximum effectiveness.
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- Can
I use auto changeover on the thermostat to change between
Heat and Cool and be able to Humidify or Dehumidify
when needed?
Yes,
however White-Rodgers recommends setting your humidity
setpoint lower than your dehumidifying setpoint. Also
set your heating setpoint lower than your cooling
setpoint so the thermostat does not detect a conflict.
The thermostat does not changeover based on room humidity,
it changes over based on room temperature and your
heating and cooling setpoints.
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- How
can I get a copy of the Operating Manual for my thermostat?
Listed below are links to installation/operating
instructions for
90 Series Digital thermostats.
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