My pool got pretty green last week, and I've gotten it back to the point of nice and clear. I still have some debris and today when I turned on the Polaris (280 cleaner, with a PB4 booster pump) the booster pump didn't start. It hummed but wouldn't start. I changed the cap, but still humming and no start.
Any ideas where to trouble shoot next? I was thinking the impeller may be stuck, but didn't see a shaft opening where I could try and turn.