Why does Smart Thermostat call for heat, when it is passed the target temperature ?

andyblac

as the description why does this happen ?, target is 17.2˚c, room temp is 17.6˚c, but yet tado is still calling for heat ?????

johnbur

@andyblac this is the reply I got when I asked support the same question:

The tado° Smart Thermostat is a PID controlled thermostat. This means that tado° not only looks at the current temperature but also at the overall temperature trend.

In other words, it will turn the heating on until the room temperature increases just above the set-point. Then the heating will remain off until the temperature starts to drop.

In doing this, tado° can prevent your heating from switching on and off too frequently and thereby protect the boiler from excessive wear and tear. It is also much more efficient in terms of energy usage.

It can also happen that, when tado° notices the temperature is dropping very quickly, it will start to heat in order to prevent the temperature from dropping too far below the set-point, even though the current temperature is above the set-point.

andyblac

@johnbur

thanks, I have just recently changed my max flow rate temp, so it may just need time to recalculate the AI. It is strange though as atm it is way over shooting my target temps, sometimes by 2 dec c.