The entrance door just below my room used to slam hard when being closed by the door closer, branded TELESCO. Some days ago, upon my request, there have been attempts to fix the device. Indeed, at first things were better. But now again, it slams, though perhaps not (yet) as hard as before.
I can imagine this is hard to judge, but what do you think: Is the door closer OK? Is it just maladjusted? Or is it broken?
Finally, out of curiosity (I'm not the maintenance man): How can the issue be solved?