Honeywell T4 Thermostat Query

Posted 15th Dec 2020
Installed the T4 thermostat over the weekend and currently using it on the manual mode as this works best for us.

The current room temp according to the unit was 19deg, as we felt a bit chilly we increased the target temp to 22deg. The Combi boiler fired and the flame appeared on the thermostat.

After 15min the thermostat switched off (including the boiler) however the temp reading said 20.5 and not the 22deg set.

Question is, shouldn't the thermostat reach the targeted temp before switching off?
I ask because previously we had the old fashion dial thermostat.

I couldn't find any notes in the manual:…pdf
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