Radiator Thermostatic Valve problems

[Panna]

Hey,

My radiators only heat up if the valves are set to above 4. This is the case with all the rads. They are less than a year old so i don't think it has anything to do with the pin. From what i remember, it has always been like that but did not bother me so much as i either needed them on high or not at all. However, I just want to resolve this in case it gets tricky in the future. any ideas?

Panna

 

[seco services]

if the room has not dropped below that temp the trv won't open.