The radiator makes unbearable noises throu out the night, which drives her insane. We think that this is due to air pockets in the pipes, we can hear crackling and water drops.
The heating system is common to the whole building, and I cant turn off hot water.
How do i open this shit


Oh valid point. Dont unscrew the whole valve haha. Only the slotted key hole!
Steam might come out if you have a very major pressure issue or water temprature is way way too high. Either case, slowly opening the valve solves all off that