My pool cleaner service has been saying that the pump has been having a problem priming at times. I called a repair place out and it seems to have no issue when he fires it up. Last Wednesday I got home and noticed the water not moving but the pump was running. I asked my wife and she said it was like that all day--my first thought was "why did you not shut it off". So 6-7 hours of pump run. I went out to the pump and there was NO water in the sight window (probably like that all day), regardless the pump still sounded fine and it has done this several times. I am wondering what is the next step, or does this look like a pump is shot. I am not sure how old the pump is because we purchased the home used. Any thoughts, like I said...this has happened before. As a matter of fact, it was operating perfectly the day before the pool cleaner service came, then it started to act up again intermittently. Oh yeah, I heard a strange gurgling sound from the pool equipment one night as it is outside of our bedroom window. The pool guy swapped out an O-ring and said that may be causing the prime portion...however, I still cannot get it to work.