How do I temporarily override my schedule without cancelling it permanently?

To override the schedule until a specified time, press in the Indoor Temperature area to reveal the Temperature Control Panel, adjust your Cooling or Heating Set Points using the Up and Down arrows, then press in the Status Area to set the day and time when the hold will cancel. The words 'Holding Until' will appear under the Indoor Temperature, and the schedule will automatically resume at the next period change.

From the official Trane XL824 Smart Wi-Fi Thermostat manual, page 17

Have a follow-up question?

Answers from the official manual.

Common questions