When people come to a space, they assume that everything they see is going to be working properly.
If that’s not the case, make sure you make that clear. An easy way to do that is just to put a simple sign up to alert guests that something is nonfunctional.
I went to a BnB a few weeks ago that did this. The ice machine had stopped working, and rather than having guests figure this out on their own, they just put a simple sign up. It let people know about the problem, and also that there were ice trays in the freezer if they wanted them.
It was just so nice to have expectations set from the start. Plus, the ice tray was a sign reminder that the hosts were doing their best to address the problem. Definitely recommend!