I recently replaced both sides A & B directionals, new tracks and the motor on my zodiac mx8. It seemed to be working properly then suddenly it stopped working. I have it connected to a dedicated suction line which is not clogged and has plenty of suction. It will work for a few seconds if I spin the propellers underneath, however, will stop in its tracks. Cartridge filter is clean too. I also tried it w/o the cartridge filter installed. Still no go. Very frustrating. Any help/advise would be greatly appreciated.