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

[Chrism523]

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 on). I also just replaced the internal drive mechanism with a gen 2 tune up kit. The water management system and the feed hose are from the original.

Wheel rotations are at about 34 rpm.

If I remove the bag it runs just fine. Stays flat on the bottom and does not get stuck on walls. I thoroughly cleaned the bag and put it back on but the issue remains.

Does anybody have any suggestions? I'm at a loss.

Thanks,
-Chris

 

[Patrick_B]

Welcome to TFP, and glad you joined us!

I've never had one of those, but people talk about them around here fairly often. Best of luck solving the issue.

 

[Chrism523]

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.

 

[Flatline____]

Is it a polaris bag or aftermarket? I once bought an aftermarket bag that was too fine and the water didnt flow through well causing it to try and float.