We had a pond installed two years ago which included two Aquasurge 4000-8000 pumps. Today I was doing some pond maintenance and unplugged the two pumps which I do all the time. When I was done I plugged them back in but only one started. I switched outlets as they are on separate circuits. The one that hadn't started still didn't. I then turned on the manual switch on the remote box and the pump started but in this situation it only runs at the highest level. I turned the manual switch off and still could not get it to start with the remote. I even put a new battery in the remote even though the existing one tested fine. The pump still would not start. Does anyone have any suggestions what else I could try?