Ok, so why is this pump so blasted loud when it 1st starts up now? It's almost a growl until it gets up to speed, then it's quiet and has excellent flow. The bearings are smooth, I checked no problems there. The impeller is clear, everything is tight. It's just very loud for the 1st 2 seconds or so when it activates... makes me fear something is failing, but I have no idea what.
The other day it was running on cycle already, but I turned it off to switch the sand filter over to Backwash... I turned it back on to backwash the filter and it ran fine about 1 minute to completely backwash the filter, then off again to switch to Rinse, on again to rinse the sand filter maybe 20 seconds, then off again to return sand filter to Filter mode. But, when I turned it back on for the last time it just sat and growled and didn't pump any water! After maybe 10 seconds of the growling sound, it cut off (thermal cut-off, I'm guessing?). I took it off-line disconnected the pump from the pool and sand filter and brought it inside to check it out... after taking the pump apart to confirm it wasn't jammed or anything, I plugged it into an outlet and turned it on on the bench and it started right up (I only let it run dry for a few seconds then turned it off). So what is the deal here? Arghhh!
Any ideas guys?
ps. I already tried a different capacitor from a spare pump on it, no change though still growls a second or 2 on startup only then runs smooth and quiet after that.