I am trying to get my 15 yr old Life Spa going again after being empty a long time. I have power to the pump, I can hear it humming. It's a two speed pump. The "High Pump" red light is lit on the panel. It sounds like it is trying to activate, but clicks off after about 30 seconds. I have opened the prime knob and water is flowing out. I am unsure if I am priming it correctly, electrical, or maybe pump seizure? Has anyone come across this issue? Suggestions welcome. Thanks!