Came home from vacation to a crystal clear pool , but the pump was making a loud screeching noise. When I turned it to low, it was still loud, but not screeching so I turned it off. Today I cleaned out baskets and backwashed filters. When I turned it on, it filled no problem but once it was completely full and I closed filter valve, the screeching noise started again but not as loud. Gauge reads at 10 PSI. Impeller is spinning freely so I'm assuming it's the bearings. However, last year I took the motor in and the bearings were replaced so I was wondering if something else might be going on to cause this problem? The motor is 5 years old. It's a Hayward Super Pump 1.0 HP, 230V, dual speed.
I noticed that just the motor can be replaced vs the whole pump. Am I better off doing this vs having it serviced again?
BTW, earlier this year because of ammonia problems that I had, I switched to BBB method and everything chemically has been fine. Although the Frog is still hooked up, it has an empty chlorine container in it.