My Polaris 3900 w/booster pump is doing tight donuts and no water is out of the three jets that are in the chimney. There is plenty of water coming out of the tail the little dial jet that is below the tail. The dial jet thingy is set at the 11 o'clock position. I've tried adjusting the RPM and it didn't make any difference. I've cleaned the inline filter screen. Don't know what to do now. There was a lot of debris from Hurricane Irene and I had to clean the filter bag several times a day right after the storm. I purchased my polaris in June of this year, so it might be under warranty if it isn't a simple fix. I don't mind breaking it open, but don't want to void the warranty. I've downloaded the manual and it didn't address the chimeny jets. Thanks.