Honeywell T5 Smart User Manual

If you are unable to complete the setup/connection/registration process, attempt the following before
reattempting:
Power cycle the thermostat by removing it from the wall for 30 seconds. Reattach the face plate.
Turn off mobile/ cellular data on your mobile device and connect to your home Wi-Fi network. “Forget” any other Wi-
Fi networks in range. (Turning on Airplane mode is also an option)
Some Android phones have an updated security feature that may not allow your phone to connect to “unsecured” Wi-
Fi networks. Temporarily disable this feature via Settings – Network & Internet – Wi-Fi – Wi-Fi Preferences on your
mobile device.
Attempt to connect and register the thermostat to a mobile hotspot. This allows the registration data to bypass any
network security that may be causing the connection failure. Once successfully registered, a Wi-Fi Reset can be
performed to move the thermostat to the home Wi-Fi network.
Advanced Steps:
If you experience inability to connect, failure to register, or frequent Wi-Fi signal loss, verify the following:
*You may need assistance from your Internet Service Provider to verify/ change some settings*
Setup a 2.4GHz Bandwidth Only network with separate SSID (Not compatible with 5GHz networks.
Simultaneous 2.4 and 5GHz networks that share a name or SSID are not recommended and can cause
thermostat to lose connectivity).
Connect directly to the router signal – Not recommended for use with signal booster, satellites, or extenders.
Business Networks (Enterprise networks, guest networks, or networks that require logging in via a web
page/portal) are not supported.
Gateways or Network switches can block some traffic to Honeywell and are not supported.
Recommended WPA2-AES Network Security Protocol
DHCP Enabled – Static networks not supported
UPnP / P2P Enabled
Band-Steering Disabled
*”Not Supported” refers to network configurations that may be compatible, but cannot be successfully supported by
Resideo Customer Care. “Incompatible” refers to networks / configurations that the thermostat is incapable of
communicating with.*
What should I do if my thermostat is already registered?
For Honeywell Home thermostats, you will need to register the thermostat. Call 1-800-633-3991 to get it set up. When
you call, make sure you have the following information ready:
1. The MAC ID and CRC numbers for your thermostat.
2. Make sure the thermostat is online and connected to your local Wi-Fi network.
3. Check that you have created an account with the Honeywell Home mobile app.
4. Make sure you are near the thermostat during the call. This process will take 20-30 minutes to complete.
When setting up my T5, T5+, or T6 Pro WiFi, why can’t I connect to my WiFi?
If you are unable to complete the setup/connection/registration process, attempt the following before
reattempting:
Power cycle the thermostat by removing it from the wall for 30 seconds. Reattach the face plate.
Turn off mobile/ cellular data on your mobile device and connect to your home Wi-Fi network. “Forget” any other Wi-
Fi networks in range. (Turning on Airplane mode is also an option)
Some Android phones have an updated security feature that may not allow your phone to connect to “unsecured” Wi-
Fi networks. Temporarily disable this feature via Settings – Network & Internet – Wi-Fi – Wi-Fi Preferences on your
mobile device.
Attempt to connect and register the thermostat to a mobile hotspot. This allows the registration data to bypass any

Honeywell T5 Smart Specifications

General

Brand	Honeywell
Model	T5 Smart
Category	Thermostat
Language	English