i have the same issue in my Dining room -> Thermostat displays as "OFF" but the heating is nerverending. and the Dinign area is heated upto 29degrees when i came home and the App & the Device continues to display "OFF" -> even after manually chnaging to some value and reverting to OFF doesnt do any trick to stop the heating.
@AidanLangley : I did the same and now all TRVs are working perfectly - measured temperater at target-spot and also adjusted the Offset to set realistic temperatures. looks like Tado observed the new "correct" behaviour of my TRV and perhaps thus never answered :)
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