Compatibility Section

  • REQUIRED: A C-Wire (common wire) is needed for 24 VAC power. If you do not have a C-Wire, then a C-Wire Adapter is provided.
    This guide will help you determine if you have a C-Wire or will need to use the included C-Wire Adapter (Step 10). The C-Wire is a wire that originates from your heating and cooling system and needs to be connected to the C terminal on your thermostat. There is no universal color used to designate this type of wire.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - designate this type
  • Compatible with most heating/cooling, and heat pump systems
  • Does not work with electric baseboard heat (120-240V)
  • Does not work with millivolt systems
  • Does not support S terminals for indoor and outdoor sensors
  • Android or iOS smartphone, tablet, or device

Can cause electrical shock or equipment damage. Disconnect power before beginning installation.
Compressor protection is bypassed during testing. To prevent equipment damage, avoid cycling the
compressor quickly.
If this product is replacing a control that contains mercury in a sealed tube, do not place the old control in the trash. Contact your local waste management authority for instructions regarding recycling and proper disposal.
For help, see:
SOCIAL Twitter: @Honeywell_Home, Facebook: Honeywell Home
Or contact:
PHONE: 1-800-633-3991

Removing your old thermostat

You will need: Screwdriver, needle-nose pliers

  1. Turn off power 
    ROUGHNECK 41874 Portable Fuel Transfer Box Kit -warning To protect your equipment, turn off the power at the breaker box or switch that controls you heating and cooling equipment.
    Note: The thermostat off switch will not turn off the power to the equipment.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - Turn off power
  2. Check that your system is off
    Change the temperature on your old thermostat so that your system starts heating or cooling.
    If you don’t hear or feel the system turn on within 5 minutes, the power is off.
    Note: If you have a digital thermostat that has a blank display, skip this step.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - system is off
  3. Remove your existing thermostat from the wall plate
    On most thermostats, you can take off the thermostat by grasping and gently pulling. Some thermostats may have screws, buttons, or clasps.
    ROUGHNECK 41874 Portable Fuel Transfer Box Kit -warning Do not remove any wires from your thermostat at this time!Honeywell T9 Smart Thermostat RCHT9610WFW2003 - wall plateSONIQ E24FB40A 24 FHD LED LCD TV -WARNING Compatibility Check
  4. Do you have a line voltage system?
    Line voltage systems have thick black wires with wire nuts or are labeled high voltage (120V or higher).
    Your system is not compatible. Go to to find a pro installer in your area.
    Continue to the next step.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - voltage system
  5. Take a picture of your existing wall plate’s wiring
    In order to capture all of the letters next to the terminals, be sure to take multiple pictures from different angles.
    You may need to reference this image later.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - existing wall
  6. Remove any jumpers
    A jumper is used to connect two terminals. It may look like a small staple or a colored wire.
    Do not discard.
    Keep jumpers with your old wall plate.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - Remove any jumpers
  7. Label the wires
    Use the stickers provided with your new thermostat to label each wire on your existing wall plate.
    Do not label jumpers. Your new thermostat does not need jumpers.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - Label the wires
  8. Write down the colors of the wires
    Check the boxes and write down the color of the wires connected to terminals that are coming from the wall. Check all that apply (not all will apply).Honeywell T9 Smart Thermostat RCHT9610WFW2003 - colors of the wires* A C-wire or C-Wire Power Adapter (included) is required.
    ** The T9 Smart thermostat cannot control equipment wired to U1 or U2.
    If there are wires in terminals that are not listed, you will need additional wiring support. Visit to find out more.
  9. Disconnect the wires and remove the old wall plate
    You may need a screwdriver to release wires from terminals.
    Tip: Wrap the wires around a pencil to prevent them from falling in the wall.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - Disconnect the wiresSONIQ E24FB40A 24 FHD LED LCD TV -WARNING Compatibility Check
  10. Do you have a C-Wire?
    Look at the thermostat wiring checklist from Step 8, or the photo you took. Is the C-Terminal checked?
    This means you will not need to install the included C-Wire Adapter. Skip to Installing Your New Thermostat (page 9).
    This means you don’t have a C-wire connected to your thermostat. Continue to the next step.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - C-Wire
    Handes SymbolOnly complete this section if you answered No to Step 10
    Connecting Your Unused C-Wire
    You will need: Screwdriver, flashlight, wire strippers
     Compatibility Check
  11. Do you have a zoning panel?
    You have a zoning panel if you have multiple thermostats and one furnace or heating system.
    C-Wire Adapter installation is more complicated on zoned systems. Go to to find a pro installer in your area.
    Proceed to the next step.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - zoning panel.
  12. Do you have an unused wire?
    Look at the bundle of wires coming from the wall.
    Note: You may have to pull the bundle of wires out from the wall to find the unused wire.
    Continue to Step 13.
    Open the included C-Wire Adapter box and follow the instruction guide.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - unused wire
  13. Label unused wire
    Label your unused wire with the provided “C” sticker label. You may need to use a wire stripper to expose at least 1/4 inch of the wire.
    Note: If you have multiple unused wires, then label only one wire and make note of the color here:
    Go to your furnace or heating system
    Go to your furnace This system is often located in your basement, attic or garage. Bring a flashlight and screwdriver.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - Label unused wire
  14. Remove cover from furnace or heating system
    Open the heating and cooling system’s cover to find the control board. You should see the same terminal labels that are on your thermostat.
    Note: You may need to unscrew the cover. The control board may be at the top or bottom. Honeywell T9 Smart Thermostat RCHT9610WFW2003 - heating
  15. Find the other end of the unused wire
    Locate the bundle of wires that are the same as the ones at your thermostat.  The unused wire should be the same color as the one near your existing thermostat. See Step  13 for the color you wrote down.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - unused wire2
  16. Connect the unused wire to the C-terminal
    Note: If there are existing wires in the C-terminal, make sure they are still connected to the C-terminal after connecting this wire.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - C-terminal
  17. Close the cover to the furnace or heating system
    Be sure the cover is completely closed.
    Some systems will not power up if the cover isn’t fully closed.
    You’ve connected the C-wire.
    You will NOT need to use the included C-Wire Adapter.
    Go to your furnace Go back to the wall where you are installing your thermostat and continue to “Installing Your New Thermostat” on the next page.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - Close the cover
    Installing Your New Thermostat

    You will need: Level, pencil, drill, and a drill bitHoneywell T9 Smart Thermostat RCHT9610WFW2003 - New Thermostat
  18. Position wall plate
    Pull open the wall plate that was included with your new thermostat. Insert the bundle of wires through the back of the wall plate.
    Make sure at least 1/4-inch of each wire is exposed for easy insertion into the wire terminals.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - Position wall plate
  19. Insert recommended wall anchors
    It is recommended that you use the wall anchors included in the box to mount your thermostat.
    You can use the wall plate to mark where you want to place the wall anchors.Honeywell T9 Smart Thermostat RCHT9610WFW2003 -anchors
    a) Level the wall plate
    b) Mark the location of the wall anchors using a pencil
    c) Remove the wall plate
    d) Drill anchor holes.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - Remove the wall plate
    If your box contains red anchors, drill 7/32” holes.
    If your box contains yellow anchors, drill 3/16” holes.
    e) Insert the wall anchors
    f) Make sure the anchors are flush with the wall
    g) Reposition the wall plate on wallHoneywell T9 Smart Thermostat RCHT9610WFW2003 - Reposition the wall plate
  20. Determine Correct R-Switch Position and Insert R-wire or wires
    Set the R-switch up or down based on your wiring notes in Step 8. Insert wires into the inner holes of the terminals on the wall plate. The tabs will stay down once the wire is inserted.
    If you have 1 R-Wire (R, RC, RH):
    1. Ensure the right R-switch is in the up position.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - ups
    2. Insert your R-wire (R, Rh or Rc) into R-terminal.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - R-terminal.
    If you have 2 R-Wires (R, RC, RH):
    1. Set the right R-switch to the down position.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - down position.
    2. Insert your Rc wire into Rcterminal.
    3. Insert your R or Rh wire into R-terminal.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - r Rh wire into
  21. Connect remaining wires from Step 8
    Push down on the tabs to put the wires into the inner holes of their corresponding terminals on the wall plate (one wire per terminal) until it is firmly in place.
    Gently tug on the wires to verify they are secure.
    Tip: If you need to release the wires again, push down the terminal tabs on the sides of the wall plate.
    This wiring is just an example, actual wiring may vary.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - actual wiring
  22. Close the door and mount the wall plate
    Mount the wall plate using the provided screws. Install all three screws for a secure fit on your wall.
    Tip: Prior to tightening the screws, use a level to ensure the wall plate is level.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - door and mount
  23. Attach your thermostat
    Align the thermostat on the wall plate and firmly snap it into place.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - Attach your thermostat
    Go to your furnace Go back to your circuit breaker box.
  24. Turn the power back on
    Turn on the switch that controls your heating and cooling system.Honeywell T9 Smart Thermostat RCHT9610WFW2003 - Turn power back on
  25. Go back to your thermostat.
    Complete setup on the thermostat Remove the protective film and confirm that your thermostat reads “Welcome.” If you do not see this, visit or call 1-855-733-5465 for more help.Honeywell T9 Smart Thermostat RCHT9610WFW2003 -Complete setup

Getting the most from the T9 Smart Thermostat 

Prioritize Rooms
Prioritize a specific room or multiple rooms, or let comfort follow your move using built-in motion detection.
Control on the Go 
Adjust your thermostat from anywhere using your tablet or smartphone.
Save Energy
With geofencing, you can save money on the most expensive part of your energy bill while you’re away.
Simple Installation 
The thermostat automatically programs itself. Just answer a few simple questions and you’ll be up and running in no time.
Whole-Home Range
With up to a 200-foot* range, 20 sensors with temperature, humidity, and occupancy detection can connect to your thermostat from throughout your home.
*Range can vary based on home construction, wireless interference, and other factors.
Know Your Home Is Safe
Get customizable alerts on your mobile device such as when the basement is so cold a pipe could burst, or if the baby’s room is getting too hot.

Using your thermostat

The screen will wake up by pressing the center area of the displayed temperature.

Honeywell T9 Smart Thermostat RCHT9610WFW2003 - Using your thermostat

Using Priority

Priority creates an average temperature in your home based on specific rooms. This allows you to prioritize comfort where you want it.
From the Home screen, select MENU, then Priority.

Honeywell T9 Smart Thermostat RCHT9610WFW2003 -Using Priority


If you have difficulty with your thermostat, please try the following suggestions. Most problems can be corrected quickly and easily.

Display is blank• Check the circuit breaker and reset if necessary.
• Make sure the power switch for the heating & cooling system is on.
• Make sure the furnace door is closed securely.
• Make sure the C wire is connected.
• Make sure the R/Rc jumper is set correctly. See page 11.
Heating or cooling system does not
• Press Menu > System Mode > Heat > Done to set the system to Heat mode. Make sure the desired temperature is higher than the indoor temperature.
• Press Menu > System Mode > Cool > Done to set the system to Cool mode. Make sure the desired temperature is lower than the indoor temperature.
• Check the circuit breaker and reset if necessary.
• Make sure the power switch for the heating & cooling system is on.
• Make sure the furnace door is closed securely.
• Wait 5 minutes for the system to respond.
Temperature settings do not
This thermostat has adjustable minimum and maximum limit settings for heating and cooling. If these settings were not adjusted when setup was done, heat has a setting range of 4090°F and cool has a range of 50-99°F.
Aux heat runs in cooling• For heat pump systems, verify there is not a wire attached to W on the UWP.
Cool runs with a call for heat• For heat pump systems, verify there is not a wire attached to W the UWP.
The sensor will not connect• Press and hold Connect on the wireless sensor for 15 seconds. The LED will turn Amber. Return to the thermostat menu and press Menu > Devices and Sensors. Follow the onscreen instructions to add the sensor.

The product should not be disposed of with other household waste. Check for the nearest authorized collection centers or authorized recyclers. The correct disposal of end-of-life equipment will help prevent potential negative consequences for the environment and human health.

2-year limited warranty

Resideo warrants this product, excluding battery, to be free from defects in workmanship or materials, under normal use and service, for a period of two (2) years from the date of first purchase by the original purchaser. If at any time during the warranty period the product is determined to be defective due to workmanship or materials, Resideo shall repair or replace it (at Resideo’s option).
If the product is defective,
(i) return it, with a bill of sale or other dated proof of purchase, to the place from which you purchased it; or
(ii) call Resideo Customer Care at 1-800-633-3991. Customer Care will make the determination whether the product should be returned to the following address: Resideo Return Goods, Dock 4 MN10-3860, 1885 Douglas Dr. N., Golden Valley, MN 55422, or whether a replacement product can be sent to you.
This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Resideo that the defect was caused by damage that occurred while the product was in the possession of a consumer.
Resideo’s sole responsibility shall be to repair or replace the product within the terms stated above. RESIDEO SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE  OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF  ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states do not allow the exclusion or limitation of incidental or consequential damages, so this limitation may not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY RESIDE MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES,  INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE TWO-YEAR DURATION OF THIS WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. This warranty gives you specific legal rights, and you may have other rights which vary from state to state. If you have any questions concerning this warranty, please write Resideo Customer  Care, 1985 Douglas Dr, Golden
Valley, MN 55422 or call 1-800-633-3991.
The operation of this equipment is subject to the following two conditions: (1) this equipment or device may not cause harmful interference, and (2) this equipment or device must accept any interference, including interference that may cause undesired operation.

Electrical Ratings

TerminalVoltage (50/60Hz)Running Current
Heating20-30 Vac0.02-1.0 A
W2 (Aux) Heating20-30 Vac0.02-1.0 A
Emergency Heat20-30 Vac0.02-0.5 A
Y Compressor Stage 120-30 Vac0.02-1.0 A
Y2 Compressor Stage 220-30 Vac0.02-1.0 A
Fan20-30 Vac0.02-0.5 A
0/B Changeover20-30 Vac0.02-0.5 A
VA Input20-30 Vac0.02-0.5 A

NOTE: Not for use with 250, 500, or 750 MV systems.

Apple® HomeKit™ Setup Code
The T9 Pro Smart supports Apple HomeKit. When prompted by the Honeywell Home app, scan the code on the back cover of the guide included with your T9 Smart thermostat.

Resideo logo

Resideo Inc., 1985 Douglas Drive North
Golden Valley, MN 55422

©2019 Resideo Technologies, Inc.
This product is manufactured by Resideo Technologies, Inc., Golden
Valley, MN, 1-800-633-3991.
The Honeywell Home trademark is used under license from Honeywell
International Inc. All rights reserved.
33-00421ES—03 M.S. Rev. 12-19
Printed in the U.S.A.

Honeywell T9 Smart Thermostat RCHT9610WFW2003 - Sn

Documents / Resources

Honeywell T9 Smart Thermostat RCHT9610WFW2003 [pdf] Installation Guide
T9 Smart Thermostat, RCHT9610WFW2003, Honeywell

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