With the leaves and all of the extra debris that ends up in the pool I decided to clean my filter grids today. After I finished cleaning them I went to turn the pump back on. It would start to circulate and run normally after about 30 seconds it would lose prime and almost be struggling for air. I checked the motor to see if I could spin the impeller and it spun freely.
I did check and my Hayward 4820 is full of water and the pool skimmers and drain are free from debris.