Bought Pentair Warrior SE Sept 2020. This winter, it stopped working (would move forward a foot, back up a foot, expel water, then stop). Water temp was 63 degrees. I returned to Marina, they repaired. On first try, repaired unit ran for about 3 minutes then froze. On subsequent retries, blue light flashes twice and bot doesn't move. Water is 51 degrees currently. My takeaway is that the Warrior SE does not seem to be suitable for reliable winter use in Central Texas.