I have had three different Polaris 280 Pool Cleaners in my pool trying to make them work. One an old one I rebuilt with new turbine bearings, another New in Box from eBay, and then a replacement new in box from a separate Polaris vendor.
Each of them worked for a little bit initially. Then the wheels stopped turning and the Polaris floated on top of the water with a small stream of water from the tail sprinkling the surrounding. On the third Polaris 280, I set it at the side of the pool in the water to count the revolutions per minute of the wheel as the instructions suggested. It went through a cycle with the reversing valve and did the wheel started turning and did not complete two minutes of wheel revolutions.
I took the pool pump to a pump repair service and paid $10 for him to verify that the rotor was firmly affixed and that the pump motor ran. I brought the pump home and reinstalled it in the system, disconnecting the swivel in the line and observed a nice stream of water coming out of the mid line swivel when I turned the pump motor on. I reconnected this new Polaris and could not make it do anything but sit still on the pool bottom when at the shallow end of the pool or hang freom its hoses when at the deep end of the pool.
I am using the red restrictor currently at the pool side (I had tried the blue restrictor and no restrictor in prior Polaris units in this trouble shooting cycle with no better results).
My main pool sand filter pump motor seems a little noisier than it previously had, but by now, I am a bit paranoid and not sure of what symptom to pursue next.
I guess I will try the local pool repair supply center for guidance next.
Perhaps the Trouble Free Pool forum can save me some money in this pool repair cycle.
My father-in-law always said "The man who owns a home deserves it" and we were never sure what he meant. I think the same logic applies to Swimming Pools