I'm having a strange issue with my Hayward Super Pump 2. The pump will go from working (moving water and filled with water) for about 30 seconds to then making a humming sound and the water drains out of the pump for a few seconds and then goes back to working. It does this the whole time it's running. There was water at the bottom of the pump so doing some research I replaced the seal assembly, and it seems to have gotten better in that the interval was shorter and there was less water but it's still not right. I'm thinking maybe there is a hairline crack at the bottom of the pump that's pulling in air? I've seen people talk about the pump not priming as a result of a air, but haven't seen anything where someone was saying the pump goes from working to not working in intervals like this.
It's been doing this for about a week and the water is still clear and it does move the water, but I'm worried that it's damaged my pump motor and I may have to replace it. It started squeaking today which prompted me to take it apart and replace the seal.
Anyone ever experience this?