Why does the air conditioner make scary noises?

https://www.openlearning.com/u/lippard-qrwxvm/blog/5LawsAnyoneWorkingInTknyMzgnymBrylShouldKnow/

Is my air conditioner haunted? When your air conditioner goes Incorrect during the night time or seems like It truly is screaming by by itself, It truly is almost certainly looking to inform you that anything