I bought it a month ago so excited because I live in New Mexico where it gets pretty hot here. Although immediately it felt cool but when I used it the first night it was blowing out hot air on energy saver. So the next night I just put in on cool and still hot fan air comes out for hours. It only works cold some nights and I decided to give it a month, but it’s very hit and miss with it getting cold. After all that, now I’ve noticed that there’s a popping sound.