Honeywell TH2110 Mode D'emploi page 16

Operating Manual
Permanent override of schedule
To permanently ignore the schedule, press or until the desired
temperature is displayed. Then, press the Hold button to maintain
the new temperature indefinitely. The word Hold will appear on the
screen.
Press the Run button if you wish to cancel the override and resume
the schedule. The word Hold will disappear and the thermostat will
be set to the temperature programmed for the current period.
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