An electric fan stirs still air and brings relief from heat, so it is read as cooling tension. A fan that keeps turning can also point to thoughts going round in circles.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.