T5+ Smart Thermostat

Honeywell Home T5+ Smart Thermostat

The Honeywell Home T5+ Smart Thermostat is a WiFi-enabled programmable thermostat designed to control compatible residential heating, cooling, and heat pump systems. It features a touchscreen display, smartphone connectivity, customizable heating and cooling schedules, and automatic temperature adjustments based on household activity.

The T5+ Smart Thermostat can be operated directly through its touchscreen or remotely using the Honeywell Home app. It supports location-based scheduling through geofencing, traditional time-based schedules, smart scheduling, and manual temperature control without a schedule.

The thermostat includes Smart Response technology, which learns how long the heating and cooling equipment takes to reach a selected temperature. This allows the system to begin heating or cooling before a scheduled period so that the preferred temperature can be reached at the programmed time.

Automatic heating and cooling changeover allows the thermostat to determine whether the home requires heating or cooling. Smart alerts can provide reminders about filter replacement and notifications related to extreme indoor temperatures.The T5+ uses a 24 VAC power supply and requires a C-wire connection. The T5+ package includes a C-Wire Power Adapter that can provide the required power connection when a compatible system does not have an available C-wire.

The thermostat is compatible with most conventional heating, cooling, and heat pump systems and supports Apple HomeKit integration.

Product Overview and Technical Specifications

The T5+ Smart Thermostat combines programmable temperature control with WiFi connectivity for compatible HVAC systems.

What’s Included in the Box

The T5+ Smart Thermostat package includes the components required for installation and initial setup.

C-Wire Power Adapter

The C-Wire Power Adapter is located beneath the thermostat in the package.

Open the end flap of the box to remove it.

Important: T5 Smart Thermostat packages that do not show a plus sign (+) after T5 do not include the C-Wire Power Adapter.

Key Features and Scheduling Options

The T5+ provides several methods for managing heating and cooling.

Location-Based Scheduling

Location-based scheduling uses the location of a connected smartphone to determine whether household members are at home or away.

The thermostat uses geofencing technology to adjust temperature settings when the household leaves or returns.

Home and Away temperature settings can also be adjusted manually through the thermostat or Honeywell Home app.

Smart Scheduling

Smart scheduling combines geofencing with time-based programming.

This allows the thermostat to use both location information and scheduled temperature settings.

Time-Based Scheduling

Time-based scheduling allows heating and cooling temperatures to be programmed for different periods throughout the day.

The thermostat supports:

• One schedule repeated every day.
• Separate Monday–Friday, Saturday, and Sunday schedules.
• Separate weekday and weekend schedules.
• Individual schedules for every day of the week.

Each day supports four adjustable periods.

No Schedule Mode

The thermostat can operate without a programmed schedule.

When no schedule is selected, temperature control is performed by adjusting the desired setpoint.

Smart Alerts

Smart alerts provide notifications about relevant system conditions.

These include filter replacement reminders and warnings about extreme indoor temperatures.

Smart Response

Smart Response learns the behavior of the connected heating and cooling equipment.

It uses this information to help reach the selected temperature at the scheduled time.

Automatic Heating and Cooling Changeover

When automatic changeover is configured, the thermostat determines whether heating or cooling is required.

Tools Required for Installation

The following tools and items are used during installation.

Required Tools

• Phillips screwdriver.
• Small flat-head screwdriver.
• Pencil.
• Level.
• Smartphone for photographing existing wiring.
• Home WiFi password.
• Honeywell Home app.

Additional Tools That May Be Needed

• Wire stripper.
• Needle-nose pliers.
• Drill.
• Drill bit suitable for the supplied wall anchors.

Wall Anchor Drill Bit Sizes

The required drill bit depends on the color of the included anchors.

Safety Instructions and Important Warnings

The following precautions must be observed before installing or replacing the thermostat.

Electrical Hazard

Warning: Electrical shock or equipment damage can occur if power is not disconnected before installation.

Turn off power to the heating and cooling system at the circuit breaker or equipment switch before removing the existing thermostat or handling its wiring.

Equipment Damage Hazard

Compressor protection is bypassed during equipment testing.

To prevent possible equipment damage, avoid switching the compressor on and off rapidly during testing.

Line-Voltage System Warning

The T5+ must not be connected to 120V or 240V electric baseboard heating.

If the existing thermostat has thick black wires connected with wire nuts, or is rated for 120V or higher, the system may use line voltage.

The thermostat is not compatible with such installations.

Millivolt System Restriction

The T5+ is not compatible with millivolt (mV) heating systems.

Required C-Wire Power

The thermostat requires 24 VAC power through a C-wire connection or a suitable C-Wire Power Adapter installation.

Mercury Disposal Warning

If an old thermostat contains mercury inside a sealed tube, it must not be disposed of with household waste.

Contact the local waste management authority for proper recycling or disposal instructions.

Removing the Existing Thermostat

Before installing the T5+, the existing thermostat must be removed and its wiring identified.

Step 1: Turn Off the Power

1. Locate the circuit breaker or switch controlling the heating and cooling system.
2. Turn the power off.
3. Keep the system disconnected while the wiring is being handled.

Step 2: Confirm the System Is Off

Change the temperature setting on the existing thermostat so that the heating or cooling system would normally start.

Wait approximately five minutes.

If the equipment does not start, the power is off.

If the old thermostat has a blank digital display, this test can be skipped.

Step 3: Remove the Old Thermostat From Its Wall Plate

Carefully remove the thermostat from its existing wall plate.

Most thermostat faceplates can be removed by gently pulling them away from the wall.

Some models use screws, buttons, or clasps.

Do not disconnect any wires at this stage.

Step 4: Check for 120V or 240V Wiring

Inspect the existing thermostat wiring.

The system may be incompatible if:

• Thick black wires are connected with wire nuts.
• The thermostat is rated for 120V or higher.

The T5+ must not be installed on a line-voltage system.

Step 5: Photograph the Existing Wiring

Take a clear photograph of the thermostat terminals before disconnecting the wires.

The picture should show the terminal letters and the connected wire positions.

If the wire colors are faded or repeated, identify the wires using appropriate labels.

Step 6: Remove Existing Jumpers

A jumper is a small wire or metal connection between two terminals.

It may resemble a staple or a short colored wire.

Remove existing jumpers using a screwdriver.

The T5+ UWP mounting system does not require these jumpers.

Step 7: Record the R-Wire Connections

Identify which of the following terminals have connected wires.

Do not count jumpers when identifying the number of R wires.

The recorded information determines the correct R-slider position during installation.

Step 8: Identify the Remaining Wires

Record the existing terminal connections and wire colors.

The S and U terminals are not supported by the thermostat.

If the existing installation has wires connected to terminals outside the supported list, wiring compatibility assistance is required.

Checking the C-Wire Connection

The T5+ requires a C-wire power connection.

Before disconnecting the old thermostat, inspect its terminals for a wire connected to C.

If a C-Wire Is Already Connected

If the old thermostat has an existing C-wire, continue with the remaining installation steps.

If No C-Wire Is Connected

Two methods are described for obtaining the required C-wire power connection.

Option A: Finding an Unused C-Wire

An unused thermostat wire may be pushed into the wall or wrapped around the existing wire bundle.

Step 1: Inspect the Existing Wire Bundle

Gently pull the wire bundle forward and check for any unused conductors.

Step 2: Connect the Unused Wire

If an unused wire is available, it can be connected to the C terminal on the new thermostat.

The other end must be connected to the 24 VAC common terminal on the heating and cooling equipment.

For homes with multiple thermostats controlled through a zone panel, the common connection may be at the zone panel.

Step 3: Check Existing Common Connections

If other wires are already connected to the equipment’s C terminal, they must remain securely connected.

Identifying the 24 VAC Common Terminal

Not every heating and cooling system labels its common connection C.

If the equipment uses different labeling, consult its instructions or the equipment manufacturer to identify the 24 VAC common terminal.

Option B: Using the C-Wire Power Adapter

When an unused C-wire is not available, the included C-Wire Power Adapter can be used where suitable.

The adapter is located beneath the thermostat inside the T5+ package.

Open the top or bottom box flap to locate it.

The adapter has its own installation guide.

The C-Wire Power Adapter must be installed according to the separate C-Wire Adapter Installation Guide supplied with the thermostat.

Disconnecting the Old Thermostat Wires

Once the wiring has been documented and the C-wire requirement addressed, the old wall plate can be removed.

1. Use a screwdriver to release the existing wires.
2. Disconnect each wire carefully.
3. Remove the old wall plate.

To prevent loose wires from falling into the wall opening, the wires can be wrapped around a pencil.

Installing the T5+ Smart Thermostat

The T5+ uses the UWP mounting system for the wiring connections and wall installation.

The UWP should be wired before it is secured to the wall.

Step 1: Insert the Wires Through the UWP

1. Open the UWP mounting system.
2. Pass the existing thermostat wires through the rear opening.
3. Arrange the wires so they can reach their corresponding terminals.

At least 1/4 inch of each wire should be exposed for insertion into the terminals.

Step 2: Mark the Wall Anchor Positions

1. Position the UWP against the wall.
2. Use a level to align the mounting system.
3. Mark the anchor positions with a pencil.

Step 3: Install the Wall Anchors

1. Drill the mounting holes using the appropriate drill bit.
2. Insert the wall anchors.
3. Position the anchors so they are flush with the wall.

Use a 7/32-inch bit for red anchors or a 3/16-inch bit for yellow anchors.

Setting the R-Slider Switch

The UWP contains an R-slider switch that must match the number of R power wires in the installation.

Installation With One R Wire

If the old thermostat has one R, Rh, or Rc wire:

1. Move the R-slider switch to the UP position.
2. Insert the single R, Rh, or Rc wire into the R terminal.

Installation With Two R Wires

If the old thermostat has separate R/Rh and Rc wires:

1. Move the R-slider switch to the DOWN position.
2. Insert the Rc wire into the Rc terminal.
3. Insert the R or Rh wire into the R terminal.

R-Slider Configuration Table

Inserting Wires Into the UWP

Insert the thermostat wires into the inner terminal holes.

The terminal tabs remain depressed when a wire has been properly inserted.

Connecting the Remaining Thermostat Wires

After configuring the R-slider and connecting the R wires, the remaining connections can be completed.

How to Connect the Wires

1. Refer to the wire labels and photograph from the old thermostat.
2. Identify the corresponding UWP terminal.
3. Press the terminal tab.
4. Insert the wire into the inner opening of the appropriate terminal.
5. Release the tab after inserting the wire.
6. Gently pull the connected wire to verify that it is secure.

Use one wire per terminal.

Removing a Wire From the UWP

To release a wire, press the appropriate terminal tab on the side of the UWP and remove the wire.

Wiring Verification

The final wiring arrangement must correspond to the existing heating and cooling system.

The manufacturer’s UWP illustration shows an example arrangement; actual connections vary by installation.

Mounting the UWP on the Wall

After connecting the wires, secure the UWP mounting system.

Installation Procedure

1. Position the wired UWP against the wall.
2. Align it with the installed anchors.
3. Secure it using the three supplied screws.
4. Close the UWP door.

Mounting Screw Sizes

All three mounting screws must be installed for a secure fit.

Attaching the T5+ Thermostat

Once the UWP is mounted, the thermostat can be attached.

1. Align the thermostat with the UWP.
2. Position it directly over the mounting system.
3. Press the thermostat firmly until it snaps into place.

Restoring Power and Starting Setup

After installation is complete, power can be restored.

Step 1: Turn the Power On

Switch on the heating and cooling system circuit breaker or equipment power switch.

Step 2: Check the Thermostat Display

Return to the thermostat.

The display should show START SETUP.

If START SETUP does not appear, contact Resideo support.

Step 3: Choose a Setup Method

The thermostat can be configured through:

• Honeywell Home app setup.
• Manual thermostat setup.

Setting Up the T5+ With the Honeywell Home App

The Honeywell Home app provides guided setup for the thermostat.

Step 1: Start Setup

Touch START SETUP on the thermostat display.

Step 2: Select App Setup

When USE APP appears, select Yes.

The thermostat is ready for configuration through the Honeywell Home app.

Step 3: Download the Honeywell Home App

Download the Honeywell Home app from:

• Apple App Store.
• Google Play Store.

Step 4: Open the App

Launch the Honeywell Home app.

The thermostat may appear under Thermostat Found.

Step 5: Select the Thermostat

If the thermostat is detected, select SET UP NOW.

If it does not appear:

1. Create a Honeywell Home account if necessary.
2. Sign in to the account.
3. Select the T5 Smart Thermostat from the available installation options.

Step 6: Complete Setup

Follow the instructions provided in the Honeywell Home app.

The application guides the remaining configuration process.

Using the Honeywell Home App

The Honeywell Home app provides controls for the thermostat’s temperature, operating mode, fan mode, and schedule.

App Controls

Changing the Temperature

Use the temperature controls in the app to select the required indoor temperature.

Changing the System Mode

The app includes the following system modes:

• Auto.
• Heat.
• Cool.
• Off.
• Emergency Heat.

Changing the Fan Mode

The app provides these fan options:

• Auto.
• On.
• Circulate.

Managing the Schedule

The SCHEDULE control provides access to heating and cooling schedule settings.

The Honeywell Home app interface may change as the app receives updates.

Touchscreen Controls and Display Guide

The T5+ has a touchscreen display that provides direct control of heating, cooling, and thermostat settings.

The screen wakes when the center of the displayed temperature is touched.

Main Screen Information

Adjusting the Temperature

1. Wake the thermostat display.
2. Touch + to increase the selected temperature.
3. Touch – to decrease the selected temperature.

System Mode Control

The Mode control allows selection of:

Available modes depend on the heating and cooling system configuration.

Fan Control

Menu Functions

The thermostat Menu includes:

• Schedule.
• Screen Lock.
• Ventilation.
• WiFi.
• Clean Screen.
• Additional thermostat settings.

Available functions depend on the thermostat’s configuration.

Manual Setup Without WiFi

The T5+ can be configured manually when the WiFi network is unavailable.

The thermostat can be connected to a smartphone later.

Step 1: Start Manual Setup

Touch START SETUP.

Step 2: Select Manual Configuration

When USE APP appears, select No.

The thermostat enters manual configuration.

Step 3: Move Through Setup Options

Use the touchscreen navigation arrows to move through the available configuration settings.

Step 4: Edit a Setting

1. Select Edit or touch the setting’s text area.
2. The selected value begins flashing.
3. Use the navigation arrows to choose the correct value.
4. Touch Done or the text area to confirm.

Step 5: Finish Configuration

Continue through the setup options until FINISH SETUP appears.

Touch Select or the text area.

Step 6: Configure WiFi

At the end of manual configuration, the thermostat displays SETUP WIFI.

If WiFi is unavailable, select No.

Step 7: Set the Time and Date

Configure the following:

• Daylight Saving Time, if applicable.
• Date.
• Clock format.
• Time.

After the settings have been completed, the thermostat is ready for basic operation.

Equipment Setup Options

The T5+ provides installer configuration options for scheduling, HVAC equipment type, heat pump operation, and heating and cooling stages.

Equipment Setup Reference

Option 120: Schedule Type

The thermostat supports the following schedules.

The default scheduling arrangement is Monday–Friday and Saturday–Sunday.

The schedule can be modified through MENU and SCHEDULE.

Option 200: System Type

This option selects the basic HVAC system type.

Available choices are:

• Conventional Forced Air.
• Heat Pump.
• Boiler.
• Cool Only.

Option 205: Equipment Type

The equipment selection depends on the chosen system type.

Conventional Forced-Air Heating

Heat Pump

Available heat pump choices include:

• Air to Air.
• Geothermal.

Boiler

Available boiler selections include:

• Hot Water.
• Steam.

Option 205 is not displayed when the system type is set to Cool Only.

Option 218: Reversing Valve

This option determines whether a heat pump’s O/B reversing valve is energized in cooling or heating.

This setting appears when a heat pump is configured.

Option 220: Cooling and Compressor Stages

This option selects the number of cooling or compressor stages controlled by the thermostat.

The thermostat supports a maximum of two cooling or compressor stages.

Option 221: Heating and Auxiliary Stages

This setting selects the number of heating and auxiliary/emergency heating stages.

The thermostat supports up to two conventional heating stages.

For systems with more than one heating equipment type, the maximum auxiliary/emergency heating stage count is one.

Scheduling the T5+ Smart Thermostat

The T5+ supports several scheduling arrangements, allowing heating and cooling setpoints to be adjusted automatically.

Time-Based Schedules

The time-based schedule can be configured to use:

• One schedule for the entire week.
• Separate weekday and weekend schedules.
• Separate weekday, Saturday, and Sunday schedules.
• Individual schedules for all seven days.

Daily Schedule Periods

Each day can have four adjustable periods.

The touchscreen identifies the periods as:

Accessing Schedule Settings

From the thermostat home screen, touch MENU and select SCHEDULE.

The Schedule menu allows the programmed periods, temperatures, and scheduling status to be changed.

Enabling or Disabling Scheduling

Scheduling can be turned on or off through the Schedule menu.

When No Schedule is selected, temperature is controlled manually.

Location-Based Scheduling and Geofencing

The T5+ supports geofencing through the Honeywell Home app.

Geofencing uses smartphone location information to determine whether the household is home or away.

Away Operation

When the connected smartphone leaves the configured home area, the thermostat can activate the Away temperature settings.

Home Operation

When the smartphone returns to the home area, the thermostat can use the Home temperature settings.

Adjusting Home and Away Temperatures

The Home and Away setpoints can be changed through the thermostat or Honeywell Home app.

Multiple Users and Geofencing

Geofencing supports multiple users.

The system responds to:

• The last person leaving the home.
• The first person returning.

Every household member must have a separate account.

A single account should not be shared between multiple users.

Smart Response and Automatic Changeover

Smart Response

Smart Response uses information about the heating and cooling system’s operation to help reach the scheduled target temperature at the appropriate time.

Automatic Heating and Cooling Changeover

Automatic changeover allows the thermostat to determine whether heating or cooling is required.

The available behavior depends on the selected HVAC system configuration.

Adding Multiple Users to the Honeywell Home App

The Honeywell Home app supports shared access to thermostat locations.

How to Add a User

1. Open the Honeywell Home app.
2. Touch the three-line menu icon.
3. Select Manage Users.
4. Touch Add User.
5. Enter the email address of the person being invited.

If the invited person already has a Honeywell Home account, the thermostat location is added to that account.

If the person does not have an account, an email invitation provides instructions for downloading the app and creating an account.

Shared Access Permissions

Users who have access to a thermostat share the same privileges.

They can change thermostat settings and add or remove other users.

Apple HomeKit Setup

The T5 Smart Thermostat supports Apple HomeKit.

The manufacturer’s instructions direct users to complete HomeKit setup through the Honeywell Home app.

Connecting to Apple HomeKit

When prompted by the Honeywell Home app, scan the Apple HomeKit setup code provided on the back cover of the original Quick Install Guide.

Follow the app’s setup instructions to complete the connection.

WiFi Connection Troubleshooting

The T5+ can continue local temperature control when its WiFi connection is unavailable.

However, app-dependent functions such as geofencing do not operate while the connection is lost.

Thermostat Cannot Find the WiFi Network

The T5 Smart Thermostat operates on the 2.4 GHz WiFi band.

Some smartphones connect to both 2.4 GHz and 5 GHz networks.

If a smartphone can detect a network but the thermostat cannot, check whether the router is broadcasting a 2.4 GHz network.

Many routers broadcast separate network names for 2.4 GHz and 5 GHz.

WiFi Signal Lost

If the thermostat reports that its WiFi signal has been lost:

1. Wait for the thermostat to reconnect.
2. If necessary, select a different network using the Honeywell Home app configuration menu.
3. Check the router if the thermostat cannot reconnect.

Thermostat Appears Offline

A crossed-out WiFi symbol in the upper-right area of the thermostat display indicates that the network connection has been lost.

The Honeywell Home app may also show the thermostat as offline.

Check that the router is powered on and transmitting.

The network may need to be restarted by power-cycling the router according to the router manufacturer’s instructions.

The thermostat automatically reconnects when the network connection is restored.

Changes in the App Do Not Appear Immediately

There may be a short delay between changing settings in the Honeywell Home app and seeing those changes reflected on the thermostat.

WiFi Signal Strength

WiFi signal range depends on the router.

The router’s user instructions should be consulted for information about wireless coverage and signal strength.

Honeywell Home Account Activation

A Honeywell Home account requires email activation during registration.

Activation Email

The manufacturer’s guide identifies the activation email sender as:

connected-Home@alarmnet.com

If the Activation Email Does Not Arrive

1. Wait approximately five minutes.
2. Check the email account’s Spam or Junk folder.
3. Select Resend to request another activation email.
4. Contact technical support if the activation email still cannot be received.

Technical support is available at 1-800-633-3991.

Cleaning and Maintenance Features

The thermostat includes a Clean Screen option in its Menu.

This feature is listed alongside screen locking, ventilation, WiFi, scheduling, and other thermostat settings.

Smart Maintenance Alerts

Smart Alerts can provide reminders about filter replacement.

These notifications can help identify when scheduled HVAC maintenance is due.

System Monitoring

The thermostat can also issue warnings related to extreme indoor temperatures through connected smart alert functions.

C-Wire Power Adapter and Installation Accessories

The T5+ package includes a C-Wire Power Adapter that can be used when the installation does not have an available C-wire.

When to Use the Adapter

The adapter is intended for compatible installations where the required 24 VAC common connection cannot be supplied through an existing unused thermostat wire.

Adapter Installation

The C-Wire Power Adapter must be installed using the separate adapter instructions supplied in the package.

Other Installation Accessories

The package also includes:

• UWP mounting system.
• Wall anchors.
• Mounting screws.

The mounting hardware must be selected according to the included anchor type.

Regulatory Information

The thermostat complies with applicable United States and Canadian radio equipment requirements.

FCC Compliance

The product complies with Part 15 of the FCC Rules.

Its operation is subject to the following conditions:

1. The device must not cause harmful interference.
2. The device must accept interference received, including interference that may affect normal operation.

Changes or modifications not approved by the responsible party may void authorization to operate the device.

Canadian IC Compliance

The product contains licence-exempt radio equipment that complies with applicable Innovation, Science and Economic Development Canada requirements.

The equipment must not cause interference and must accept received interference.

Warranty Information

The Honeywell Home T5+ Smart Thermostat includes a 2-year limited warranty.

Warranty terms and additional information are available from Resideo.

Official website: https://www.resideo.com

Customer Support Information

The T5+ Smart Thermostat is manufactured by Resideo Technologies, Inc. under license to use the Honeywell Home trademark.

Frequently Asked Questions

1. Does the Honeywell Home T5+ Smart Thermostat require a C-wire?

Yes. The T5+ requires 24 VAC power through a C-wire connection.

If an existing C-wire is unavailable, an unused thermostat wire may be connected to the 24 VAC common terminal, or the included C-Wire Power Adapter may be installed according to its separate instructions.

2. How is the T5+ Smart Thermostat connected to WiFi?

During initial setup, touch START SETUP and select Yes on the USE APP screen.

Download the Honeywell Home app, open it, and select the thermostat when it appears under Thermostat Found.

Touch SET UP NOW and follow the remaining app instructions.

The thermostat operates on the 2.4 GHz WiFi band.

3. Will the Honeywell T5+ work without WiFi?

Yes. The thermostat can still be adjusted directly through its touchscreen when WiFi is unavailable.

Features managed through the Honeywell Home app, including geofencing, will not function while disconnected.

The thermostat automatically reconnects when the network becomes available.

4. How is the T5+ thermostat installed without an existing C-wire?

The installation guide provides two options.

An unused wire in the existing thermostat cable can be connected to the thermostat C terminal and the corresponding 24 VAC common terminal on the HVAC equipment.

Alternatively, the included C-Wire Power Adapter can be installed according to its separate instructions.

5. How is the R/Rc slider configured on the T5+?

If the installation has one R, Rh, or Rc wire, set the R-slider to UP and connect the wire to R.

If the installation has separate R/Rh and Rc wires, set the slider to DOWN, connect Rc to Rc, and connect R or Rh to R.

6. Can the T5+ thermostat be set up without the Honeywell Home app?

Yes. When START SETUP appears, select No at the USE APP prompt.

The thermostat enters manual configuration.

Use the touchscreen navigation controls to select the system settings, finish setup, and configure the time and date.

The phone can be connected later.

7. Does the T5+ Smart Thermostat support Apple HomeKit?

Yes. The T5 Smart Thermostat supports Apple HomeKit.

When the Honeywell Home app requests the HomeKit setup code, scan the code provided on the back cover of the original Quick Install Guide and follow the app instructions.

8. Why does the T5+ thermostat show a crossed-out WiFi symbol?

A crossed-out WiFi symbol indicates that the thermostat has lost its network connection.

Check that the router is powered on and broadcasting.

If required, power-cycle the router according to its instructions.

The thermostat reconnects automatically once the network connection is restored.