Tado works except one radiator not working.
I have recently bought a house built in 2004 by Barratt Developments in Greater Manchester area.
There is a Potterton boiler in the kitchen and radiators both of which were installed when the house was built. There is a gas certificate from August 2021.
The previous owner installed the tado smart thermostat and it now works throughout the house (after a lot of help from forum members) apart from on one radiator in a middle floor bedroom which remains cold even if I turn the heating up and all the other radiators respond. I have noticed a dial on the side of the radiator and have tried turning this to various positions but the radiator seems to stay cold.
I am completely new both to tado and to gas central heating so would be grateful for any advice either about adjusting tado or the radiator to get this radiator heating up. See attached pics.