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  1. C

    Polaris 3900 leans on 2 wheel side. Runs fine without bag.

    Thanks Patrick_B. If I can't get it fixed, I think I might start looking into a robotic cleaner. Lots to research if I go that route.
  2. C

    Polaris 3900 leans on 2 wheel side. Runs fine without bag.

    My 3900, which I have had for 3 years or so now, has been running on it's side about 80% of the time lately and gets stuck by walls where they meet the pool floor. Needless to say, it isn't cleaning the pool bottom like this. I replaced the ballast float and the backup valve (it was constantly...