It is a clean apartment with a perfect location.
There are a lot of comments about the very disturbing noise from the water heater. That’s why I texted to the host before we book the apartment and asked if that was fixed.
Unfortunately this information was not correct and we spent out first night sleepless. The sound is not bearable.
It was quite disappointing that we were tricked by the host because the issue was fixed. When we communicated about the issue they pretended like they would take care of the issue the next day by sending a person to repair. But it was just to calm the temperature down and they did not take any action.
I sent them the picture of the part they should change.
For the future guests that might be potentially tricked by the host,
follow the two steps to eliminate the sound:
1. Plug off the power switch of the heater
2. Turn off the tap entering the water heater.
Reverse everything a while before you take shower to get hot water.
I needed to figure this out on my own, as there was no instruction given. So I hope it would be helpful for future guests.