How do I temporarily override my programmed schedule?
Press the + or - button to adjust the temperature to your desired setpoint. The display will show 'TEMPORARY HOLD' and the new temperature will be maintained until the next scheduled time period begins. To cancel, press + or - and then press Cancel.
From the official Honeywell T4 Pro Programmable Thermostat (TH4110U2005/U) manual, page 4
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