Honeywell RET97A5 User manual

User Guide
Wi-Fi Color Touchscreen
Programmable Thermostat
RET97A5 Wi-Fi

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In the box you will find
• Thermostat
• Wallplate
• Screws and anchors
• Quick Start Guide
Features of your Wi-Fi 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.
• View outdoor temperature and humidity (requires Wi-Fi set up and registration).
• Thermostat ID Card
• Wire labels
• User Guide

Welcome
Congratulations on your purchase of a Honeywell
Wi-Fi color touchscreen programmable thermostat.
When registered to Honeywell’s Total Connect
Comfort Solutions, 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.
Honeywell’s 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.

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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
www.thermostat-recycle.org 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 wifithermostat.com or call 1-855-733-5465 for assistance before returning the
thermostat to the store.

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About your new thermostat
Home screen quick reference ..............4
Business screen quick reference .........5
Installation
Installing your thermostat .....................7
Connecting to your Wi-Fi network ......25
Registering your thermostat online ....30
Operation
Setting the time/date ..........................34
Setting the fan ....................................35
Selecting system mode ......................36
Preset energy-saving schedules ........37
Adjusting program schedules.............38
Overriding schedules–home...............41
Overriding schedules–business .........42
Viewing equipment status ..................43
Setting vacation hold–home...............44
Setting holiday/event schedules–
business..........................................45
Setting custom events–business........46
Setting holiday schedule–business ....48
Setting holiday override–business......49
Initiating occupancy mode–business..50
Customizing screen color...................51
Setting preferences ............................52
Cleaning the thermostat screen .........53
Adjusting security settings..................54
Software updates ...............................55
Unregistering your thermostat............56
Smart Response Technology .............57
Pre-occupancy purge .........................58
Compressor protection.......................59
Auto changeover ................................60
Setting advanced preferences............61
Changing system setup......................64
Appendices
Frequently asked questions................67
Getting help and responding to
alerts ...............................................69
Troubleshooting ..................................71
Limited warranty .................................75
Table of contents

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Quick reference: home use
HOME. Touch to display Home screen.
FAN. Select fan mode.
SYSTEM. Select system mode (heat/cool).
MENU. Touch to display options. Start here to
set a program schedule.
Current schedule. Change temperature
setting and select temporary or permanent
hold.
Indoor conditions. Shows indoor temperature
and humidity.
Current date and time.
Current status. Shows system mode (heat/
cool).
Outdoor conditions. Outdoor temperature
and humidity appear after registration.

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Quick reference: business use
HOME. Touch to display Home screen.
FAN. Select fan mode.
SYSTEM. Select system mode (heat/cool).
MENU. Touch to display options. Start here to
set a program schedule.
Thermostat location. Quickly identify which
thermostat is in control of a specific area.
Current schedule. Touch an arrow to change
temperature setting and set a temporary hold.
Override. Touch to temporarily override the
program schedule.
Indoor conditions. Shows indoor temperature
and humidity.
Current date and time.
Current status. Shows system mode (heat/
cool).
Outdoor conditions. Outdoor temperature
and humidity appear after registration.

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Setting up your thermostat
Setting up your Wi-Fi programmable touchscreen thermostat is easy. It is
preprogrammed and ready to go as soon as it is installed and registered.
Install your thermostat.
Connect it to your home wireless network.
Register online for remote access.
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
wifithermostat.com/support
2
3
1

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Installing your thermostat
You might need the following tools to install this thermostat:
• No. 2 Phillips screwdriver
• Pen
• Pencil
• Level (optional)
• Drill and bits (3/16” for drywall,
7/32” for plaster) (optional)
• Hammer (optional)
• Electrical tape (optional)
1 Switch OFF power to your
heating/cooling system.
Important! To protect your
equipment, switch OFF the power
to your heating/cooling system
at the breaker box or the system
switch.
or
M31535
Circuit
breaker
box
Heating/cooling
system power
switch

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C
M33823A
If you have an older thermostat
with a sealed mercury tube, turn
to page 2 for proper disposal
instructions.
Terminal
designation
Installing your thermostat
2 Remove old thermostat faceplate
and leave wires connected.
2a Take a picture of the
wire connections for later
reference.
2b If no wire is connected to
a terminal labeled C or no
C terminal exists on the
old thermostat, view the
Alternate Wiring videos at
wifithermostat.com/videos
Important! C wire is required
and is the power source for your
thermostat. Without a C wire, your
thermostat will not power up.
Note: You will need a
picture of your wire
connections to wire the
new thermostat.