The pump turns on and sounds good but no water flow. I tried moving the impeller around to get any dirt out with my hand and then after that it started working as normal. Now it has stopped again. I don't know what might be wrong. Is there debris stuck in there or is something wrong electrically that the impeller is not working? Do I attempt to have it serviced or just buy a new pool pump? About how much is the labor for installation of a new pool pump in Florida?