I have been struggling with my pool pump for the last two weeks but learning a ton. Just moved into the house a few months ago and I never owned an inn ground pool.
The pump ran regularly, on a timer, all winter long. Two weeks ago it was a windy few days and I was out of town. A ton of small leaves blew into the pool, sunk to the bottom and got sucked up into the filter.
When I got home and checked the pool the pressure which is usually around 8-10 was over 30...
I pulled the filter, skimmer basket out and cleaned them. When I put everything together I noticed leaks and huge air bubbles in the skimmer basket. I fixed the leaks on the pressure side and replaced the O ring on the basket. When I turned the pump on it would almost 100% prime then after about 20 minutes, the pump starts to lose it prime. I pulled the pump replaced the shaft seals and the associated gaskets. The pump is a Pac Fab Challenger.
I do not understand for the life of me, how the pump can almost 100% prime (only a small air bubble) for about 20 minutes then start to crash.
If I turn the pump off and let it sit, then restart it, it will do the same thing, almost prime then kinda fizzle out after 20 minutes.
If I let it sit over night, vacuum is still present in the system.
There is no water loss in the pool.
Any direction would be extremely valuable.