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
She means for you to tackle the issue, not necessarily fix it yourself.
Get the owner to fix it, call a janitor or plumber, or anyone who knows how to fix it.