Had my heating system upgraded with evohome for 2 years. What I do notice on one of the rads is that it takes about a minute for the HR92 to turn on from off in the mornings. This is a pain because itís in the bedroom. I have now turned it off completely in the morning so I am not woken up at 5am every time the heating turns on. I have tried taking it off and turning the black wheel all the way to the left and reseating it but itís still the same. Have I just got a dodgy valve on the radiator? The radiator is about 4 years old so not an antique but was there when I bought the house.