Originally Posted by
Billywizzo
Are you checking to ensure the HR92 is properly locked into place on the radiator.
I didn’t fully lock the one in my kids room in place and it did not shut off the radiator, so the radiator was always hot when the heating was on.
Also try turning it to the off position, when you hear the valve close, turn on the heating for another room and see if the problem radiator gets hot.
It could be the HR92 not fully closing the valve for some reason.
Also try swapping it to another room and see if it still does the same, an easy way to see if the HR92 is faulty or it is something with the radiator valve causing the issue.
The part in your picture, ensure it is screwed on fully and like you said you should wind the black part out every time you take the HR92 off as it calibrates itself when you refit it.