MyTunze 6215 wavebox has recently become unreliable and not the impeller is seized. I took it apart and I see the axle impeller and a little blue washer with a black disk in it. I cleaned it out and it now runs for a few and then seizes. It is a pain to get out so the next time I take it out is must stay working. I took a look online and the drive shaft replacement part has two blue boots terminating on the end of each end of the axle. This is obviously different than the one I have. What should I replace to get it working again? Thanks again.
