Honeywell T6 Pro Smart manual

Temperature override

Set Hold, then return to your schedule

1. Use the temperature arrows. For a time-based schedule, Hold Until shows when the temporary change ends.
2. To change that time, touch it, wait for it to blink, adjust it and confirm with Hold Until.
3. For an ongoing override, touch Hold Until, then Permanent Hold.
4. To resume programming, touch the active Hold label, then Run Schedule.

The manual limits temporary Hold to 12 hours. Location-based control follows different events, so confirm the active scheduling mode before expecting that timer.

Time-based schedule

Edit the schedule on the thermostat

1. Touch Menu, use the navigation arrows to find SCHEDULE, then touch Select.
2. Select the day group and period to edit. Adjust the time, then confirm with Select.
3. Set the heating and cooling temperatures, confirming each. Continue through periods, then choose DONE and Select to save.

Changing between everyday, weekday/weekend and individual-day schedule types requires the Resideo app. The touchscreen edits the currently chosen arrangement.

To control the temperature manually, the Schedule menu has Sched. On/Off. This differs from resetting a saved program.

App and Wi-Fi

Connect with the app for your account

1. Connect your phone to the 2.4 GHz home network.
2. For an existing Resideo setup, choose Add Device in that app and follow the prompts. For a new account or migration, use the current T6 app-support instructions linked below.

The manual names Resideo. Current manufacturer support also covers First Alert migration: existing Resideo users can keep using their current app until migrated, while new accounts use the current setup guidance. Total Connect Comfort is a different platform.

Loss of Wi-Fi does not prevent a manual temperature change at the thermostat. App-dependent features, including geofencing, need connectivity.

Location-based control

Choose geofencing in the app

The Resideo app manages location-based control and smart scheduling. In its Schedule options, the manual describes Switch to geofencing and Use Geofencing. Follow the current app’s permission and household setup instructions.

If you prefer a predictable clock-based program, use the app’s time-schedule option instead. Confirm the active schedule on the thermostat after changing it.

Model and troubleshooting

Check WF in the complete model number

For TH6210U2001, TH6220U2000 or TH6320U2008, use our non-Wi-Fi T6 Pro guide. Do not apply its battery or button instructions to a WF model.

Use the official troubleshooting and reset sections for a persistent fault. Choose a reset only after checking what it erases; cancelling Hold does not require resetting network credentials.