Tapping noise coming from the radiator

naviown

Hey, this is making me insane. I recently moved to a renovated apartment, and one of the radiators closest to my workspace is tapping noise for 12 hours daily.

In total, there are 3 of them, and the others are completely fine. I tried bleeding the radiators, but only water came out. The tapping noise is coming if the radiator is not even heating and when it's heating. The sound comes from the pipes that are both leading into the wall, so up to my understanding it comes from the piper expansion or them interfering with some kind of objects. I am ready to destroy the wall, please help if you have some ideas.

You can listen to it here, the first appearance is at 00:06, and the second one at 00:27

https://jumpshare.com/s/PxF6Gv0JsMw5nWfRI4ai

Thank you!

Mad Dog_2

Good luck..those are tough ones. Get the super involved for sure. Mad Dog

EdTheHeaterMan

That tapping noise is definitely not Morse Code, unless the telegraph agent is really old. (or Tim Conway on a Carol Burnett skit)

Mad Dog_2

Or Das Boot....Mad Dog