"Poor performing" Polaris 3900 Sport

[mfork00]

I have a "poor performing" Polaris 3900 Sport - tangles often, moves with a wheel off ground, circles, tips backwards, etc. Reading forums, I checked the joints and they all seemed to more freely. The only thing I found was that this backup valve (the "float" in attached picture) sounds like it has water swishing around inside. Could that be the source of the problem and should I start by addressing that? If so, what is best way to address?

Thanks.

 

[ajw22]

If you suspect the backup valve is not working properly then replace it and see if it fixes the problem.

Polaris Pool Cleaners - Further Reading

www.troublefreepool.com

 

[mfork00]

If you suspect the backup valve is not working properly then replace it and see if it fixes the problem.

Polaris Pool Cleaners - Further Reading

www.troublefreepool.com

I guess my question is "is it normal for it to feel / sound like water is splashing around in the backup valve?" - outside of that, I have no reason to suspect it is working incorrectly.

 

[ajw22]

My pool has been closed for 6 months and I don;t remember ever feeling water sloshing around in the valve but I never really had a reason to look carefully.

Polaris Pool Cleaners - Further Reading describes how to open up the backup valve to examine the mechanisim and gears,