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General Information |
Installation Questions | Troubleshooting
General Information
Do programmable thermostats really save
energy?
What does a thermostat do?
How does a programmable thermostat work?
Can a mechanical or manual be replaced with
a programmable thermostat?
Can I use a Filtrete (TM) Thermostat from 3M with my
system?
How do I know if I have a Heat Pump?
What is a Heat Pump?
What is Emergency heat for on a heat pump?
How do I know if I can use a Filtrete (TM)
Thermostat from 3M with my heat pump?
Will a Filtrete (TM) Thermostat from 3M control a
two-speed blower?
Can I use this in my trailer or motor home
for heating and cooling?
Can I use a Filtrete (TM) Thermostat from 3M with a
two-stage gas, oil, propane or a two stage
electric furnace system (W1 and W2)?
Will a Filtrete (TM) Thermostat from 3M work with a
three-wire, zoned, hot water system?
Can I use a Filtrete (TM) Thermostat from 3M in my
trailer or motor home?
Can I use a Filtrete (TM) Thermostat from 3M with a
two stage cooling system?
Can I use a Filtrete (TM) Thermostat from 3M with a
Zoned forced air heating and cooling system?
Do Filtrete (TM) Thermostat from 3Ms work with all
types of fuel and heating systems?
Can I use a Filtrete (TM) Thermostat from 3M with my
swamp cooler?
Can I use a Filtrete (TM) Thermostat from 3M with my
baseboard electric heat?
I was told to get a thermostat with “short
Cycle delay”, what is that?
Is it important to level the new Filtrete
(TM) Thermostat from 3M?
Installation Questions
How do I determine what type of heat I have?
How do I wire the thermostat?
How should the wires be prepared for
installation in the wire terminal block on
the 3M22 thru 3M50 thermostats?
Where should I connect the C wire?
What do I do with the W2 and/or E and/or X2
wires?
Where does the red wire go?
What do I do with the extra wires in the
wall that are not connected?
Do I need to match the wire colors to the
letters on my Filtrete (TM) Thermostat from 3M?
What do I do with the W2 or E or X1 or X2 or
X or L or T wire?
I am not sure if I have a C wire. How do I
determine if I do?
Can my thermostat be used on batteries as
well as 24VAC from the heater?
My old thermostat had an anticipator
adjustment. Where is it on yours?
How long do the batteries last?
What does the red blinking light mean?
What does the half full battery icon mean?
Can I use rechargeable batteries in the
Filtrete (TM) Thermostat from 3M?
The thermostat is blinking between time and
temperature how can I stop this?
When in calibration mode what does the
T-FACTOR on my thermostat mean?
Troubleshooting
Why doesn’t the remote work on my Filtrete
(TM) Thermostat from 3M?
If you need to install a C wire, please see
FAQ: “How to install a C wire?
I installed a new thermostat and my heating
and/or cooling does not come on. Why?
I installed a new thermostat and my system
is running continuously. Why?
Why does the temperature fluctuate
uncomfortably with my new thermostat?
The room temperature reading appears to be
incorrect. Why?
The thermostat occasionally resets to
factory setting. What could be causing this?
My heat is shutting down before it reaches
temperature?
Why does the room temperature take so long
to respond?
Why does the thermostat change settings by
itself?
My unit is blinking the word heat. What does
this mean?
My unit is blinking the word cool. What does
this mean?
General Information
Do programmable thermostats really save
energy?
Yes, programmable thermostats can save
energy which in turn saves you money on your
utility bill. With the proper use of
pre-programmed settings, a programmable
thermostat can save you about $120.00 every
year in energy costs.
What does a thermostat do?
In the most basic form the thermostat is a
temperature controlled on/ off switch. For
example if the thermostat is in the heat
mode the thermostat will turn on the heat
when the room temperature is lower than the
set temperature and turn the heat off when
the room temperature is higher than the room
temperature. When the thermostat is in the
cool mode it will turn on the Air
Conditioner (if present) when the room
temperature is above the set temperature and
turn it off when the room temperature is
lower than the set temperature.
How does a programmable thermostat work?
A programmable thermostat follows ether a
preset program or a user-defined program.
The program tell the thermostat what
temperature to maintain during a given time
period. In most programs there are comfort
periods and energy save periods. Energy save
period are usually used when you are away or
a sleep. Comfort periods are for when you
are at home and awake.
Can a mechanical or manual be replaced with
a programmable thermostat?
Yes, in most case it can. The 3M Filtrete
programmable thermostats are compatible with
low voltage (mili-volt to 24 volt) whole
house residential systems. The current
wiring on your existing thermostat will be
used with the new thermostat. Some models
are made to be compatible with line voltage
heating systems like wall or baseboard
heaters. See compatibility chart for
details.
Can I use a Filtrete (TM) Thermostat from 3M with my
system?
Yes, in most case it can. The Filtrete (TM)
Thermostat from 3Ms are compatible with low voltage
(mili-volt to 24 volt) whole house
residential systems. The current wiring on
your existing thermostat will be used with
the new thermostat. We also make units that
are compatible with high voltage systems 120
to 240 volts. See compatibility matrix for
details.
How do I know if I have a Heat Pump?
If you have a heat pump when your heat is
running the unit outside with the fan on top
(compressor) will be running also and it
will be blowing cold air. To verify that you
have a heat pump, look at the labels on the
outside portion of your heating/air
conditioning unit (if it is a heat pump this
is your heat exchanger). Somewhere on the
unit it should say “heat pump”, if it is a
heat pump. Also if you have an “O” or “B”
thermostat connection, you may have a heat
pump.
What is a Heat Pump?
A heat pump is essentially and air
conditioner (A/C) that can work in reverse.
An A/C pumps heat out of the house into and
outside air exchanger and into the outside
air. A heat pump uses very similar equipment
and pumps heat from the outside air into the
house. The heat pump has a “reversing valve”
to go from Cool to Heat. An Air Conditioner
gets less efficient in cooling a house as
the outside air gets hotter. Similarly, the
heat pump gets less efficient as the outside
air gets colder.
What is Emergency heat for on a heat pump?
Emergency heat is a common term for
secondary heat. On most heat pumps electric
heat strips are used to quickly heat up the
house. If your heat pump cannot bring the
house up to temperature it will engage
auxiliary along with heat pump to bring the
temperature up quicker. But if it is very
cold outside (under 35 degrees) the heat
pump is not efficient so, it is best to tell
the thermostat to only use the 2nd heat
source only (emergency heat). This costs
more money to run so when the outside
temperature increases put the system back in
normal heat pump mode. On some units the 2nd
heat source is not electric. These systems
are called duel fuel systems. The 2nd stage
heat may be a gas, oil or propane furnace.
How do I know if I can use a
Filtrete (TM) Thermostat from 3M with my heat pump?
Filtrete (TM) Thermostat from 3Ms are currently
available for single stage heat pumps and
heat pumps with auxiliary heat. If you have
an emergency heat switch and have a W2 wire
and/or X2 and /or E wire on your current
thermostat, you need a Filtrete (TM)
Thermostat from 3M compatible with heat pumps with 2
stage heat. See compatibility Matrix for
compatible models.
Will a Filtrete (TM) Thermostat from 3M control a
two-speed blower?
Yes, but ONLY as a Single speed blower. Use
the G1 wire from the blower for low speed
all the time or G2 for high speed all the
time. Mark and tape off the unused wire.
Can I use this in my trailer or motor home
for heating and cooling?
Yes, make sure the thermostat’s single/two
source power jumper is set for 2 source
power (RC and RH separate) and reset the
thermostat. Connect the two wires for you
12V heating to RH and W. Connect your two
low voltage AC wires to RC and Y. If you
have a FAN wire from the AC connect it to G.
If you have a two-speed fan control, connect
the G1 wire for low speed or the G2 wire for
high speed, mark and tape off the unused
wire.
Can I use a Filtrete (TM) Thermostat from 3M with a
two-stage gas, oil, propane or a two stage
electric furnace system (W1 and W2)?
Yes, we make several units that will work
with this type of system. Please see
compatibility matrix for specific models.
You will hook up the first stage of heat (W
or W1) to the “W” terminal and the second
stage of heat (W2) to the “W2” terminal.
Will a Filtrete (TM) Thermostat from 3M work with a
three-wire, zoned, hot water system?
Yes, we make several units that will work
with this type of system Please see
compatibility matrix for specific models.
My Mobile home has a manual Heat/cool switch
separate from my thermostat. Can I use a
Filtrete (TM) Thermostat from 3M?
Yes. Connect the two wires to RH and W and
leave the thermostat in the Heat position
all the time. The thermostat becomes a
temperature controlled on /off switch. If
the thermostat control’s seems backwards,
re-connect the two wires to RC and Y and
leave the thermostat in the cool position
all of the time.
Can I use a Filtrete (TM) Thermostat from 3M in my
trailer or motor home?
Yes, we make several units that will work.
Please see compatibility matrix for specific
models. Then just follow the installation
instructions for your heater and Air
Conditioning system type (Propane, gas,
elect etc)
Can I use a Filtrete (TM) Thermostat from 3M with a
two stage cooling system?
Yes, we make several units that will work
with this type of system Please see
compatibility matrix for specific models.
Can I use a Filtrete (TM) Thermostat from 3M with a
Zoned forced air heating and cooling system?
Yes, most zoned forced are systems have a
master control board which controls the
baffles in the forced air system to allow
heat or cool into the areas calling for it.
This allows different areas of the house to
be at different temperatures as a function
of that area’s own thermostat using a single
heating and cooling system.
The selection of heat or cool is made by the
master controller. If you wish to use
Filtrete (TM) Thermostat from 3Ms at the remotes you must
remember to make sure all thermostats are in
the same mode ether heat or cool.
Some zoned forced are systems master
controllers use both B and O and some use
just one of the letters. Be sure it is a
forced air zoned system before connecting
both the O and B. Some of the brands of
zoned forced air controllers are Durazone,
Trol-A -Temp and Comfort Zone.
For more information on hooking up these
types of system please contact support at
888-607-5824 or filtrete@radiothermostat.com
Do Filtrete (TM) Thermostat from 3Ms work with all
types of fuel and heating systems?
Yes, any 2 wire, low voltage, or milli-volt
heating system can be used with a Filtrete
(TM) Thermostat from 3M. This included all 2
wire hydronic (hot water) heating systems,
regardless of fuel types. If you have a 3
wire hydronic (hot water) heating system
please see compatibility matrix for the
correct thermostat model.
Can I use a Filtrete (TM) Thermostat from 3M with my
swamp cooler?
Yes and No. It depends on the swamp cooler.
Some of these units are high voltage and
others are low voltage. If the unit is low
voltage in most case it will work and be
connect like any air conditioning system,
i.e. RC, Y and G (sometimes G2) If there is
a two speed fan, connect just the G fan wire
to the thermostat’s G terminal for low or
both fan wires (G and G2) to the
thermostat’s G terminal for high fan.
Our 6002 is a line voltage thermostat that
can do heat or cool and would work fine with
swamp coolers particularly the large roof
mounted type.
Can I use a Filtrete (TM) Thermostat from 3M with my
baseboard electric heat?
No, We do not make any thermostats that are
compatible with 120 to 240 volt systems.
Can a programmable thermostat be programmed
to fit my schedule even if there is a
program per installed?
Yes, the 3M Filtrete programmable thermostat
gives you the flexibility to change the
existing program to fit your specific needs.
Easy-to-understand instructions are included
to help you change the program and with the
copy function it is quick and easy to make
the changes.
I was told to get a thermostat with “short
Cycle delay”, what is that?
All Filtrete (TM) Thermostat from 3Ms with cool
capability have a built in approximately 5
minute shot cycle delay from the time a
compressor turns off until the thermostat
will turn it back on. This is to prevent
compressor stall. The delay in not present
if the thermostat is turned from cool to off
and back to cool or heat to off and back to
heat and also if you do not have a C wire
attached to the thermostat and there is a
power outage. However, if you have a C wire
attached and there is a power outage it will
have a delay.
Is it important to level the new
Filtrete (TM) Thermostat from 3M?
No, Filtrete (TM) Thermostat from 3M are all digital
and do not require leveling.
Is there someone I can contact if I have a
question about the installation or operation
of my Filtrete (TM) Thermostat from 3M?
Yes, 3M Filtrete offers a US-based technical
support staff to help you with any questions
you may have. Technical assistance is
available over the phone at 888-607-5824 or
Via Email at Filtrete@radiothermostat.com
Installation Questions
How do I determine what type of heat I have?
There may be several ways to determine what
type of heat you have. First, if you can
access the unit that is responsible for
creating the heat, you may find some
indication of the type of heat you have on
somewhere on the unit. A good place to look
is on the yellow Energy Star Sticker; near
the bottom of the sticker it will tell you
the type of heat. If you are the owner of
your home, check the paperwork on your home
you received at the time of purchase, as
often there will be a description of the
type of heating you have in the home. There
are other things you can consider, such as
the following.
A furnace draws air from the house into a
ductwork system, taking it to an area where
it is warmed before being delivered back to
living spaces. Newer furnaces use blowers to
recirculate the warmed air. A furnace may be
fueled with gas, electricity, oil, or even
coal or wood. Gas and oil furnaces light a
burner that warms a heat exchange unit,
which in turn warms the air before it is
circulated back through the house. These
furnaces have a flue where exhaust gases
vent to the outside. An electric furnace
uses heating strips, or elements, to warm
the air. A wood or coal furnace has a sealed
firebox where the fuel is burned and a heat
exchanger where air is warmed before
delivery.
A heat pump on the other hand works by
shuffling heat from one place to another.
They also serve as air conditioners during
warm weather, so a heat pump is an air
conditioner that works in reverse to make
heat. Ask yourself whether or not the unit
that you think of as an air conditioner
(usually located outside) runs when you are
calling for heat. If so, you have a heat
pump. Heat pumps also have air handlers
(usually located inside the home), which are
responsible for circulating the air through
the home. Heat pumps extract warmth from
outdoor air, from ground or surface water,
or from the earth. The air is warmed more by
the system if necessary and then circulated
through the house. You'll find metal vents
and filters similar to those used for forced
air furnaces. The outdoor unit usually
states 'heat pump' on its label.
Baseboard heaters are often visible as long,
metal units with electrical elements inside.
Each unit has its own control and is often
high voltage.
Radiant systems warm objects in much the
same way as the sun does. No blowers are
used. Electric radiant elements are
installed in floors or ceilings.
Hydronic heating is another type of radiant
heat where hot water flows through tubes
under the floor or through units that
resemble baseboard heaters. A hydronic
system might be installed in ceilings.
Hydronic heating systems include a boiler
that warms circulating water.
How do I wire the thermostat?
To wire the thermostat you need to determine
what wires you have. To find out what wires
you have you should turn off the power to
your heating and cooling system. Then remove
the thermostat from the wall and note where
the wires are attached. The wires will be
attached to terminal with letters by them.
For example the red wire attached to R or
perhaps a blue wire attached to Y, etc. Do
not assume that the color of the wire will
match the letter on the thermostat. Once you
determine which wires you have please
referred to the wiring diagrams for the
model 3M Filtrete you have. There is no
color code; even if some of the wire colors
seem to match the letters, do not use the
wire color, use just match the letters to
connect the wires.
How should the wires be prepared for
installation in the wire terminal block on
the 3M22 thru 3M50 thermostats?
To wire the thermostat strip the wires back
about 1/8 of an inch. Insert the wire in the
correct terminal making sure you go through
both holes and then snug the screw down
tight enough to get a good contact but not
too tight that you break the wire or the
screw. Then pull on the wire to make sure it
is connected.
I have 5 wires and 4 of them connect to the
old thermostat. Where do I connect the other
wire to?
Only re-connect the wires that were
connected to the old thermostat. Do not
connect any other wires as you do not know
where or it they are connected to the
heating and or cooling system. Do not
connect the extra wire to the C or any other
terminal.
Where should I connect the C wire?
If you have a ”C” wire, connect it to the
“C” terminal. Do not connect anything else
to the “C” terminal.
What do I do with the W2 and/or E and/or X2
wires?
W2 or X2 wires are used on two-stage gas or
oil or electric heating systems or a heat
pump with auxiliary heat. If there is an E
wire tape it off as it is not necessary. 3M
Filtrete has several units that are
compatible with multistage heating and heat
pump systems. See compatibility Matrix for
compatible models. All or just some of these
wires may be used with the new thermostat.
Please refer to the installation manual or
contact support at 888-607-5824 or email
filtrete@radiothermostat.com
Where does the red wire go?
If the red wire was connected to the R
terminal on the old thermostat, then connect
to the RH terminal on the new thermostat. If
a different colored wire was connected to
the R terminal on the old unit then label it
and connect to the new thermostat in the
same way. Always rerer to the letter to
which the wire was connected on the old
thermostat before removing the wire. This
will be the label for your wire. There is no
color code, just a letter code.
My old thermostat has two wires, but the
installation instructions for my Filtrete
(TM) Thermostat from 3M show only a three wire
installation.
On a two wire low voltage, heat only systems
connect to the RH and the W terminals. The
“C” (common) wire is optional, and is not
needed to run the thermostat. If you have
the “C” wire, connect it to the “C”
terminal, and it will extend the
thermostat’s battery life substantially.
What do I do with the extra wires in the
wall that are not connected?
Leave them disconnected but tape the wires
off so they do not touch each other or any
other wire. If you do not have a “C” wire,
the next time your furnace is serviced, ask
the technician to connect one of the extra
wired to the “C” (common) connection at the
furnace and the “C” terminal in the
thermostat to extend the life of your
batteries.
Do I need to match the wire colors to the
letters on my Filtrete (TM) Thermostat from 3M?
No, sometimes the colors match the letters
but not always. Be sure to label the wires
according to the letters they connected to
on the old thermostat first and wire
according to terminals the wires were
attached to.
What do I do with the W2 or E or X1 or X2 or
X or L or T wire?
In most cases these wires are not used and
should be individually taped off. But
sometimes they are used for example W2 is
2nd stage of heat in a conventional heating
system and should be connected to W2. In a
heat pump system W2, E, X1 or X2 are used to
turn on auxiliary/emergency heat and one of
them should be attached to the W2 terminal.
Which one you connect depends on the system.
The X wire sometimes corresponds to the C
wire which is 24AC common power. The L wire
is a system monitor and used to light a
light on the thermostat – not used on the
Filtrete (TM) Thermostat from 3M. The T wire is an
external temperature sensor and is not used
with the Filtrete (TM) Thermostat from 3M. So they can
be taped off and put in the wall.
I am not sure if I have a C wire. How do I
determine if I do?
There are two ways to determine if you have
a “C” or common wire. 1) If there is a wire
hooked up to the “C” terminal on the old
thermostat, hook it up to the new thermostat
on the C terminal. 2) If you have a spare
wire in the wall you can go to the connector
panel at the furnace/air handler end and
check for a “C”, 24VC, or common connector
and connect the extra wire to there and then
to the “C” on the Filtrete (TM) Thermostat from 3M.
(Sometimes the C wire is also labeled
different for example it may an X wire
depending on the manufacture of the
system/thermostat.) If your system is a
Trane or American Standard, connect their B
wire to the new thermostats C terminal.)
Can my thermostat be used on batteries as
well as 24VAC from the heater?
Yes, Filtrete (TM) Thermostat from 3Ms will operate on
batteries and 24 volts AC. The 24 volts AC
common will be connected to the “C”
connector. The batteries will last
significantly longer using both the 24 Volts
AC from the system along with the batteries.
An added advantage to using batteries along
with having a “C” wire is that the batteries
will keep the programming if you should lose
house power.
C Wire Installation
The C wire stands for COMMOM and originates
from the common side of the 24 VAC
transformer. The R/RH wire coming up to the
thermostat is one side of the 24VAC
transformer. The other side of the
transformer goes to the HEAT relay, the
COMPRESSOR relay, and the FAN relay, hence
the expression "common" wire.
Generally, this connection is indicated with
"C", "comm." Or "24VAC" wherever the rest of
the thermostat wires connect at the furnace.
Sometimes it is directly available at the
transformer on older systems. All 24VAC
systems by definition have the common side
of the transformer. Finding and connecting
to it takes a qualified HVAC repairman as
there are lethal (115AC) voltages in the
furnace. We cannot recommend you doing the
connection yourself. That is why we say "if
there is a C wire, connect it". The C wire
is not necessary for most mechanical
thermostats so seldom brought up.
Once the C connection is located, if you
have an extra wire in the cable going to the
thermostat, you could use it for the C wire.
If not, a new wire would have to be put in.
2nd Transformer:
If the 24VAC common wire (C) is not
available at the thermostat, any external
24VAC plug-in adapter can be connected to
run the thermostat.
The Radio Shack part number 273-1690 for
around $15.99 can be used with its switch in
the 24V position. Another 24 volt
transformer you can use is a Rain Bird
replacement power adaptor UT1 Home Depot
part number #26C06505.Cut off the connector
and strip the wires as shown in the picture.
Then connect the wires to RH and C. There is
no polarity; either wire can go to either
terminal (RH or C).
Transformer rating is 24 volts AC at 300 to
500 mili-amps
My old thermostat had an anticipator
adjustment. Where is it on yours?
Filtrete (TM) Thermostat from 3Ms do not require an
anticipator adjustment because it is an
electronic thermostat. Electronic
thermostats typically use temperature
sensing devices called thermistors which are
very small, with almost no thermal mass.
These devices track the air temperature very
well so no anticipator is necessary.
Filtrete (TM) Thermostat from 3Ms are specified and
checked at +/- 1F accuracy.
Operation
How long do the batteries last?
All of the Filtrete (TM) Thermostat from 3Ms run on
batteries with an optional C wire (24Vac) to
provide power to the thermostat so it will
run. If you are using a good quality brand
of alkaline batteries they will typically
operate the thermostat for aproximatly 12
months. Therefore they should be replaced
regularly once a year or whenever the low
battery indicator appears. If you are using
lesser quality brand batteries, more
frequent replacement may be needed.
What does the red blinking light mean?
On some of the Filtrete (TM) Thermostat from 3Ms there
is a Red light that will blink when the
batteries get low. If you see a blinking red
light please change the batteries on your
thermostat with a new set of alkaline
batteries they will be ether a pair of AA or
AAA batteries depending on the thermostat
model.
What does the half full battery icon mean?
On the Filtrete (TM) Thermostat from 3Ms with a
digital display a half full battery icon
will be displayed when the batteries get
low. If you see a half full battery icon
please change the batteries on your
thermostat with a new set of alkaline
batteries they will be ether a pair of AA or
AAA batteries depending on the thermostat
model.
Can I use rechargeable batteries in the
Filtrete (TM) Thermostat from 3M?
No, Filtrete (TM) Thermostat from 3Ms run on 3 Volts
(2 x 1.5 volt batteries), and the “Battery
Low” indicator comes on at about 2.6 volts.
The thermostat stops working at about 2.5
Volts. Two AA or AAA rechargeable batteries
only put out 2.2 volts, which means that
there maximum power level is too low to
operate the thermostat.
The thermostat is blinking between time and
temperature how can I stop this?
There is no way to stop the unit from
showing both the time and the temperature.
When in calibration mode what does the
T-FACTOR on my thermostat mean?
The (delta sign) T-FACTOR that appears on
some of the thermostat during calibration
mode means the change in the room
temperature setting when you “calibrate” the
room temperature to your liking. When you
change the room temperature with the
“calibration” function, the display shows
you both the new room temperature and the
T-FACTOR which is how much you changed the
room temperature by.
Troubleshooting
Why doesn’t the remote work on my
Filtrete (TM) Thermostat from 3M?
Make sure both the thermostat and the remote
are on the same channel. Also some channels
work better than others depending on your
situation.
If you do not have a C wire connected to the
thermostat the remote will not function. If
you do have a C wire connected it may not be
working correctly. To test to see if the C
wire is working, remove the batteries from
the thermostat and see if it still
functions. If not the C wire is not working.
If you need to install a C wire, please see
FAQ: “How to install a C wire?”
I installed a new thermostat and my heating
and/or cooling does not come on. Why?
If your unit has a fan, move the fan switch
to the “on” position to see if the fan turns
on. If it does not turn on, you may not be
getting power to the thermostat. If the fan
does not come on then check to make sure the
wires are making good contact. See FAQ: “How
to prepare wires for the thermostat?”
Also check to make sure you have a good set
of batteries in the unit. Make sure the unit
is calling for ether heat or cool. When it
is calling for heat or cool the word heat or
cool will be flashing. This means the
heat/cool should be running.
For more help please contact support at
888-607-5824 or email
filtrete@radiothermostat.com
I installed a new thermostat and my system
is running continuously. Why?
There could be several reasons for this:
• It may be a wiring issue.
• The batteries may not be good.
• Is the thermostat calling for heat or
cool? You can tell if it is calling by the
word heat or cool will be blinking.
• Does the heat or AC turn off if you move
the mode switch to the off positionand the
fan switch to the “auto” prosition? If not
does it turn off when you remove the RH
and/or RC wires? If the system still
continues to run, there is either a problem
with the wiring to the heating and or
cooling system or an issue with the HVAC
system itself. If that is the case, turn off
the power to your system.
For more help please contact support at
888-607-5824 or email
filtrete@radiothermostat.com
Why does the temperature fluctuate
uncomfortably with my new thermostat?
This may be caused by what is called swing.
Swing turns on and off the system 1 or more
degrees on either side of the set
temperature so the system will not cycle as
often and save energy and extends the life
of your system. You can change the swing on
the entire 3M Filtrete programmable
thermostat line by changing the swing
setting to a smaller value. The temperature
will then be more even by cycling the
furnace more often. On non-programmable
thermostats the swing is fixed to one degree
on either side or the set temperature.
The room temperature reading appears to be
incorrect. Why?
If you just installed or programmed the unit
the temperature reading may be off and is
most likely reading high. The thermostat has
picked up heat from you touching the unit.
It could take several hours to settle in. If
after several hours if the temperature is
still off and you unit has a digital display
you can calibrate the unit. See operation
manual for how to calibrate your specific
thermostat to match your desires.
The thermostat occasionally resets to
factory setting. What could be causing this?
In most cases the reason the unit is
resetting is there is some type of RF
interference. This is most common with spark
igniter furnaces but could come for other
sourced like static electric air cleaners
etc. One of the ways to filter RF
interference is with a ferrite choke. You
may have seen them on power cables to your
computer, or printer or on interface cables.
This usually solves the problem.
The Radio Shack Ferrite Data-Line Filter
(273-105) is a round, in-line, snap on
device that must be snapped around ALL the
leads coming out of the wall (if there is
enough room). If that does not completely
solve the problem, or if there is not enough
room at the thermostat, put a filter on the
thermostat wires as close as possible to the
furnace.
If the wires are long enough, an even better
ferrite filter is the rectangular, Radio
Shack snap on RF Choke (273-104). This one’s
hole is large enough to loop the thermostat
cable through it at least twice (if there is
enough wire). The more loops the better but
even one will help. This comes two ferrite
cores in a package so one filter can be put
at the thermostat and the other filter at
the furnace. Once installed, the ferrite
cores must be shut tight and be latched to
be effective.
My thermostat is not responding to input
since it received a static shock. What can I
do?
All electronics are susceptible to static
shock. It minimize static please ground
yourself (touch something else before you
touch the thermostat) or preferably if your
unit has a stylus use it. Since the unit is
not responding please try the following to
remedy the situation. Please take the
batteries out of the unit and remove the C
wire if available for 15 minutes. Then put a
new set of alkaline batteries back into the
unit and re-install the C wire if available,
Next reset the thermostat and try it again.
My heat is shutting down before it reaches
temperature?
This could be ether a heater/furnace issue
or a thermostat issue. One thing to check is
your air filter, to make sure it is clean or
replace it with a new one. Then try the
system again. For further tests please
contact support at 888-607-5824 or
filtrete@radiothermostat.com
Why does the room temperature take so long
to respond?
It may be on a wall that is ether very cold
or warm and it is picking up the temperature
from the wall. Try remounting it with the
standoffs do the unit can get better air
flow.
Why does the thermostat change settings by
itself?
If you have a programmable thermostat and
you override the setting by using the up and
down temperature buttons. The thermostat
will revert to the program at the next
program time setting. When you have changed
the program setting this way the thermostat
will say “temp” or “override”. If you want
to keep a specific temperature and not used
the program, you will need to put the unit
in a manual mode by activating the “hold”
button. See operation manual for your
thermostat on how to put the unit in hold.
My unit is blinking the word heat. What does
this mean?
When the thermostat is blinking the word
“heat” it means the thermostat is calling
for heat and your heat should be running.
My unit is blinking the word cool. What does
this mean?
When the thermostat is blinking the word
cool it means the thermostat is calling for
Cool and your Air conditioning should be
running.
The heat /cool worked before but is not
working now. What should I check?
• Make sure you have a good set of batteries
in the thermostat. Please us a good set of
name brand batteries (do not use
rechargeable batteries).
• Reset the thermostat.
• Make sure all the breakers and fuses to
your HVAC are good
• If you have a fan, see if the fan will
turn on in the fan “on” position (If the fan
does not come on the problem may be
elsewhere in the system)
• Check for loose or broken wires
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