Programming User Manual

Honeywell WiFi Thermostat

Honeywell WiFi Thermostat
Model: RTH65801006 & RTH6500WF Smart Series

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In the box you will find

  • Thermostat
  • Wallplate (attached to thermostat)
  • Screws and anchors
  • Quick Start Guide
  • Thermostat ID Card
  • Wire labels
  • User Guide
  • Quick Reference Card


Congratulations on your purchase of a Smart programmable thermostat. When registered to Total Connect Comfort, you can remotely monitor and control the heating and cooling system in your home or business—you can stay connected to your comfort system wherever you go.

Total Connect Comfort is the perfect solution if you travel frequently, own a vacation home, a business or manage an Investment property or if you are simply looking for peace of mind.

Precautions and Warnings

  • This thermostat works with common 24 volt systems such as forced air, hydronic, heat pump, oil, gas, and electric. It will not work with millivolt systems, such as a gas fireplace, or with 120/240 volt systems such as baseboard electric heat.
  • MERCURY NOTICE: Do not place your old thermostat in the trash if it contains mercury in a sealed tube. Contact the Thermostat Recycling Corporation at or 1-800-238-8192 for information on how and where to properly and safely dispose of your old thermostat.
  • NOTICE: To avoid possible compressor damage, do not run air conditioner if the outside temperature drops below 50°F (10°C).

Need help?
Visit for assistance before returning the  thermostat to the store.

Features of your thermostat

With your new thermostat, you can:

  • Connect to the Internet to monitor and control your heating/cooling system
  • View and change your heating/cooling system settings
  • View and set temperature and schedules
  • Receive alerts via email and get automatic upgrades

Your new thermostat provides:

  • Smart Response Technology
  • Compressor protection
  • Heat/cool auto changeover

Controls and home screen quick reference

Once your thermostat is installed, it will display the home screen. Portions of this display will change depending on how you are viewing it.

Controls and home screen

Preset energy-saving schedules

This thermostat is pre-set with energy-saving program settings for four time periods. Using the default settings can reduce your heating/cooling expenses if used as directed. Savings may vary depending on geographic region and usage. To change the settings.

Preset energy

Setting up your thermostat

Setting up your programmable thermostat is easy. It is preprogrammed and ready to go as soon as it is installed and registered.

  1. Install your thermostat.
  2. Connect your home Wi-Fi network.
  3. Register online for remote access.
Before you begin

Before you begin, you may want to watch a brief  installation video. Use the QR Code® at the front of this guide, or go to

Connecting to your Wi-Fi network

To complete this process, you must have a wireless device connected to your home wireless network. Any of these device types will work:

  • Tablet (recommended)
  • Laptop (recommended)
  • Smartphone

If you get stuck… at any point in this procedure, restart the thermostat by removing the thermostat from the wallplate, wait for 10 seconds, and snap it back onto the wallplate. Go to Step 1 in this procedure.


View the Wi-Fi Enrollment video at

  1. Connect to your thermostat.1a. Make sure the thermostat displays Wi-Fi Setup.1b. On the wireless device (laptop, tablet, smartphone), view the list of available Wi-Fi networks.1c. Connect to the network called NewThermostat_123456 (the number will vary).Connect to your thermostatNote: If you are asked to specify a home, public, or office network, select Home Network.
  2. Join your home network.2a. Open your web browser to access the Thermostat Wi-Fi Setup page. The browser should automatically direct you to the correct page; if it does not, go to Find the name of your home network on this page and select it.Join your home networkNote: Some routers have enhanced features such as guest networks; use your home network.2c. Complete the instructions for joining your Wi-Fi network and click on the Connect button. (Depending on your network setup, you may see an instruction such as Enter Password for your home network.)Note: If you did not correctly connect to the thermostat, you may see your home router page. If so, return to Step 1.Note: If your Wi-Fi network does not appear in the list on the Thermostat Wi-Fi Setup page:• Try performing a network rescan by pressing the Rescan button. This is helpful in areas with a lot of networks.
    • If you are connecting to a hidden network, then enter the network SSID in the text box, select the encryption type from the drop down menu, and click on the Add button. This manually adds the network to the top of the list. Click on the new network in the list and enter the password if necessary. Click on Connect to join the network.
  3. Make sure your thermostat is connected.While the connection is in process, your thermostat will flash Wait for up to 3 minutes. When the connection is complete, the display will show Wi-Fi Setup Connection Success. The Wi-Fi signal strength will appear in the top-right corner.After about 60 seconds, the home screen will appear and Register at Total Connect will flash until registration is complete.If you don’t see these messages, see page 10.To register online for remote access to your thermostat continue on page 12.thermostat is connectedNote: If the thermostat displays Connection Failure or continues to display Wi-Fi Setup, confirm you correctly entered your home network password in step 2. If correct, refer to the FAQ at

Registering your thermostat online

To view and set your thermostat remotely, you must have a Total Connect Comfort account. Use the following steps.

  1. Open the Total Connect Comfort web site.
    Go to
    ViewView the Thermostat Registration video at the Total Connect
  2. Login or create an account. If you have an account, click Login – or – click Create An Account.2a. Follow the instructions on the screen.2b. Check your email for an activation message from My Total Connect Comfort. This may take several minutes.Login or create an accountNote: If you do not receive a response, check your junk mailbox or use an alternate e-mail address.2c. Follow activation instructions in the email.2d. Log in.
  3. Register your thermostat.
    After you are logged in to your Total Connect Comfort account, register your thermostat.3a Follow the instructions on the screen. After adding your thermostat location, you must enter the thermostat’s unique identifiers:
    • MAC ID
    • MAC CRCRegister your thermostatNote: These IDs are listed on the Thermostat ID Card included in the thermostat package. The IDs are not case sensitive.3b. When the thermostat is successfully registered, the Total Connect Comfort registration screen will display a SUCCESS message.
    In the thermostat display, you will see Setup Complete for about 90 seconds.Setup Complete3c. Also notice that your thermostat displays its signal strength.Congratulations! You’re done. You can now control your thermostat from anywhere through your tablet, laptop, or smartphonesignal strengthTotal Connect Comfort free app is available for Apple® iPhone®, iPad® and iPod touch® devices at iTunes® or at Google Play® for all Android™ devices.

Search for local rebates
Your thermostat may now be eligible for local rebates. Search for
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Setting the time and day

Setting the time and day
Setting the time and day

Setting the fan

Press Fan to select On or Auto (toggle to re-select).
Auto: Fan runs only when the heating or cooling system is on. Auto is the most commonly used setting.
On: Fan is always on.

Setting the fan

Note: Options may vary depending on your heating/cooling equipment.

Selecting system mode

Press System to select:
Heat: Controls only the heating system.
Cool: Controls only the cooling system.
Off: Heating/cooling systems are off.
Auto: Selects heating or cooling depending on the indoor temperature.
Em Heat (heat pumps with aux. heat): Controls auxiliary/emergency heat. Compressor is off.

Selecting system mode

Note: Depending on how your thermostat was installed, you may not see all system settings.

Adjusting program schedules

Adjusting program schedules

Note: Make sure the thermostat is set to the system mode you want to program (Heat or Cool).

Overriding schedules temporarily

Overriding schedules temporarily
Overriding schedules temporarily

Overriding schedules permanently

Overriding schedules permanently
Overriding schedules permanently

Unregistering thermostat

If you remove the thermostat from your Total Connect Comfort website account (for example, you’re moving and leaving the thermostat behind), the thermostat will display Register at Total Connect until it is re-registered.

Unregistering thermostat

Disconnecting Wi-Fi

Replacing your router.
If you disconnect the thermostat from your Wi-Fi network:

1. Enter system setup (see page 18).
2. Change setting 39 to 0.

The screen will display Wi-Fi Setup.
Re-connect to a Wi-Fi network by following the steps on page 10.

Turning Wi-Fi off
If you do not plan to control the thermostat remotely, you can remove the Wi-Fi Setup message from the screen:

1. Enter system setup (see page 18).

2. Change setting 38 to 0 (see page 19). Wi-Fi Setup will be removed from the screen. If you want to connect to the Wi-Fi network later, change setting 38 back to 1.

Software updates

Honeywell periodically issues updates to the software for this thermostat. The updates occur automatically through your Wi-Fi connection. All your settings are saved, so you will not need to make any changes after the update occurs.

While the update is taking place, your thermostat screen flashes Updating and shows the percentage of the update that has occurred. When the update is complete, your home screen will appear as usual.

Software updates

Note: If you are not connected to Wi-Fi, you will not get automatic updates.

Smart Response Technology

This feature allows the thermostat to “learn” how long the heating/cooling system takes to reach programmed temperature settings, so the temperature is reached at the time you set.

For example: Set the Wake time to 6:00 am, and the temperature to 70°. The heat will come on before 6:00 am, so the temperature is 70° by 6:00 am.

Smart Response Technology

Note: System setting function 13 controls Smart Response Technology.

Compressor protection

This feature forces the compressor to wait a few minutes before restarting, to prevent equipment damage.

Compressor protection

Auto changeover

This feature is used in climates where both air conditioning and heating are used on the same day.

Auto changeover

When the system is set to Auto, the thermostat automatically selects heating or cooling depending on the indoor temperature.

Heat and cool settings must be at least 3 degrees apart. The thermostat will automatically adjust settings to maintain this 3-degree separation.

Note: System setting function 12 controls Auto changeover.

Setting functions and options

You can change options for a number of system functions. Available functions depend on the type of system you have.

This thermostat is pre-set for a single-stage heating/cooling system.
Setting function 1 for a heat pump will adjust the default settings.

Setting functions and options
Setting functions and options

System setup

System setup
System setup

Frequently asked questions

Q: Will my thermostat still work if I lose my Wi-Fi connection?
A:Yes, the thermostat will operate your heating and/or cooling system with or without Wi-Fi.

Q: How do I find the password to my router?
A:Contact the manufacturer of the router or check the router documentation.

Q: Why am I not seeing my Wi-Fi setup page?
A:You are probably connected only to your router, not to your thermostat. Try connecting to the thermostat again.

Q: Why isn’t my thermostat connecting to my Wi-Fi router even though it is very close to the thermostat?
A:Verify that the password entered for the Wi-Fi router is correct.

Q: Where can I find my MAC ID and MAC CRC codes?
A:The MAC ID and MAC CRC numbers are included on a card packed with the thermostat or on the back of the thermostat (visible when removed from wallplate). Each thermostat has a unique MAC ID and MAC CRC.

Q:My thermostat is unable to register to the Total Connect Comfort website.
A:Verify that the thermostat is correctly enrolled on your home Wi-Fi network. The message center will display Wi-Fi Setup or Register at Total Connect. You might also see the Wi-Fi Signal strength icon. Verify that the Wi-Fi router has a good internet connection. On your computer, verify that you can open the site at If you cannot open the site, switch off the internet modem for a few seconds, then power it back on.

Q: I registered on the Total Connect Comfort website but was unable to login using my new account.
A:Check your email and ensure that you received an activation email. Follow the instructions to activate your account and then login to the website.

Q: I have signed up on the Total Connect Comfort website and have not received a confirmation email.
A:Check for the email in your Junk or Deleted folder.

Q: Is there a way to extend the signal strength?
A:Most standard routers can be set up to be a repeater. You can also purchase and install a Wi-Fi repeater.

For more FAQs, see


Lost Signal
If the no-Wi-Fi indicator displays in place of the Wi-Fi strength indicator in the upper right hand corner of the home screen:

Lost Signal
  • Check another device to be sure Wi-Fi is working in your home; if not, call your Internet Service Provider.
  • Move the router.
  • Restart the thermostat: remove it from the wallplate, wait 10 seconds, and snap it back onto the wallplate. Return to Step 1 of Connecting to your Wi-Fi network.

Error Codes
For certain problems, the thermostat screen will display a code that identifies the trouble. Initially, error codes are displayed alone in the time area of the screen; after a few minutes, the home screen is displayed and the code alternates with the time.

Error Codes
Error Code


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

Display is blank

  • Check circuit breaker and reset if necessary.
  •  Make sure power switch at heating and cooling system is on.
  •  Make sure furnace door is closed securely.
  •  Make sure C wire is connected (see page 6).

Cannot change system setting to Cool

  • Check Function 1: System Type to make sure it is set to match your heating and cooling equipment

Fan does not turn on when heat is required

  • Check Function 3: Heating Fan Control to make sure it is set to match your heating equipment

Cool On or Heat On is flashing on the screen

  • Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, without damage to the compressor.

Heat pump issues cool air in heat mode, or warm air in cool mode

  • Check Function 2: Heat Pump Changeover Valve to make sure it is
    properly configured for your system

Heating or cooling system does not respond

  • Press System to set system to Heat. Make sure the temperature is set higher than the Inside temperature.
  • Press System to set system to Cool. Make sure the temperature is set lower than the Inside temperature.
  •  Check circuit breaker and reset if necessary.
  •  Make sure power switch at heating & cooling system is on.
  •  Make sure furnace door is closed securely.
  •  Wait 5 minutes for the system to respond.

Heating system is running in cool mode

  • Check Function 1: System Type to make sure it is set to match your
    heating and cooling equipment

Heating and cooling equipment are running at the same  time

  • Check Function 1: System Type to make sure it is set to match your
    heating and cooling equipment (see page 18).
  • Grasp and pull thermostat away from wallplate. Check to make sure bare  wires are not touching each other.
  • Check thermostat wiring is correct.


C wire
The “C” or common wire brings 24 VAC power to the thermostat from the heating/cooling system. Some older mechanical or battery operated thermostats may not have this wire connection. It is necessary for establishing a Wi-Fi connection to your home network.

Heat Pump heating/cooling system
Heat pumps are used to heat and cool a home. If your old thermostat has a setting for auxiliary or emergency heat, you likely have a heat pump.

Conventional heating/cooling system Non–heat pump type systems; these include air handlers, furnaces or boilers that run on natural gas, oil or electricity. They may or may not include an air conditioner.

A small piece of wire that connects two terminals together.

Alphanumeric codes that uniquely identify your thermostat.

QR Code®
Quick response code. A two-dimensional, machine-readable image. Your wireless device can read the black and white pattern in the square and link its browser directly to a web site. QR Code is a registered trademark of DENSO WAVE INCORPORATED.

Regulatory information

FCC Compliance Statement (Part 15.19) (USA only)
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:

  1. This device may not cause harmful interference, and
  2. This device must accept any interference received, including interference that may cause undesired operation.

FCC Warning (Part 15.21) (USA only)
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

FCC Interference Statement (Part 15.105 (b)) (USA only)
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:

  • Reorient or relocate the receiving antenna.
  • Increase the separation between the equipment and receiver.
  • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
  •  Consult the dealer or an experienced radio/TV technician for help.

To comply with FCC and Industry Canada RF exposure limits for general population/ uncontrolled exposure, the antenna(s) used for these transmitters must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.

Operation is subject to the following two conditions:

  1. This device may not cause interference, and
  2. This device must accept any interference, including interference that may cause undesired operation of the device.

1-year limited warranty

Resideo warrants this product to be free from defects in workmanship or materials, under normal use and service, for a period of one (1) year from the date of first purchase by the original  urchaser. 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,

  • return it, with a bill of sale or other dated proof of purchase, to the place from which you purchased it; or
  • 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, 1985 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 which occurred while the product was in the possession of a consumer.


Some states do not allow the exclusion or limitation of incidental or consequential damages, so this limitation may not apply to you.


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.

Electrical Ratings

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

2020 Resideo Technologies, Inc. All rights reserved.
The Honeywell Home trademark is used under license from Honeywell International, Inc. This product is manufactured by Resideo Technologies, Inc. and its affiliates. Apple, iPhone, iPad, iPod touch and iTunes are trademarks of Apple Inc. All other trademarks are the property of their respective owners.

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