We sold house/pool, and I'm maintaining the pool until closing in 2 weeks. Our pump motor is old (original equipt about 15 years old,), and this am when I went to turn it on, the motor didn't engage, and I heard a humming sound. I immediately turned it off, and tried it again, and it started ok. I then turned it on and off a few times and there was no problem. So now I'm nervous about leaving the pump off at night, is it ok just to let it run all the time? Thanks, Ed