Tado app gets "Heating to" temp wrong and keeps overheating the house
For ages I've had no problem with the Tado system.
But for the last few weeks this keeps happening:
I set the tado app to heat the house to - for example 19.5c
All good - house heats up, but then overheats to - for example 20.5c
The tado app registers the "Inside now" temp as 20.5c - correctly
Instead of turning the heating off Tado leaves it on!
Setting the temperature lower in Tado does nothing.
The only solutions seem to be to turn the boiler off and on again
I've tried force closing the app etc.
The app actually seems to be turning ON the boiler in order to be "Heating to" a lower temperature.
I can see the boiler receiving a request from the Tado thermostat for "More Heat" (Flashing rad icon)
I'm getting cooked here!
To confirm the usuals:
My iphone is up to date
My Tado app is up to date
The Tado Thermostat is connected to the wireless bridge and the boiler and has working batteries
The Tado Thermostat is reading the correct temperature.
The bridge is connected to my router, everything is connected to everything else
The boiler (Vaillant Ecotemp) is working fine.
The whole system used to work fine.