This is what cardone said when I sent them an email about this problem. "We would need this unit back to examine it to see what is happening. If you could have your parts store call so we can put a trace on this unit we can get it here and examine it. Have them call our tech line at 888-280-8324 and a tech can assist them on doing this." I guess I will need to pull this unit and ship it back. This now will make the 3rd unit I've put in from them. I wish I can find someone that could rebuild my orginal unit, it's in much better shape with no rust and low mileage. I took the pump and motor apart and cleaned it but still fails to turn on reliably.