I alerted V to the new noise coming from the unit outside our bedroom window and now we know that our fan blades are splitting. Can I get a WTF? That's a new one on us. Anyway, V did a quick fix to stop the flapping that occured each time it came on, and that will do until we pick up the replacement blades which are supposed to be in tomorrow. The air is cool, there is no weird noise, so yay for my handy husband!