removed pump similar to previous reply. loosened pipes, but then struggled with clips, but eventually out of desparation just wriggled the pump up, down, left right and it came loose... pulled pump semi out, but left power supply connected. held by plastic parts in hand, switched on and saw blades inside not revolving, power off, moved blades with screw driver thru front opening, piece of macadamia nut shell came loose. check other outlet also for debris... dont ask me how that got thru the filters. obviously operator error (aka spouse, hehe). reassembled... voila
erich, May 2010