OK, this is the third week in a row I've had problems with the motor.
First week, it threw the impeller bolt, causing the cap to fry. Replaced cap, rescrewed bolt. Good for a week.
Second week, repeat of above, though this time, I used Loctite on the screw.
Today, three weeks to the day, another problem. We had heavy, heavy rain today. When it ended, I went to backwash, and flipped on the booster pump. I heard a strain, but not quite like the noise when your cap is bad. I assumed the bolt came loose again. Took the motor apart, impeller bolt is nice and tight, a few stray leaf pieces, but nothing big. I turned the power on, and the shaft turned just fine.
Put the motor back in the pump, and though it will turn on and spin, it's like it's not powering up enough to get the RPM's to move the water. It's making a bit of a squeal, but not the rattle you get when the bearings are shot.
I bought this motor in March of 2011. Keep in mind, I live in Arizona, so the motor works pretty darn hard in the summer.
Also, I noticed the elbow was a little loose (it's plastic on this motor - heavy metal on the filter motor), and I'm sure some water got in there.
So, question. Is the motor shot and it's been a slow progression over the last few weeks, but I was in denial? lol Should I wait to see in the wiring dries out and anything changes (I doubt this will matter, but thought I'd throw it out there). Lastly, is it normal to replace motors this often?? In 10 years, this is my 3rd motor on the infloor. I've only replaced the filter pump once, and it's lesser HP, but, also works a lot less.